US 8,427,400 B2 · Image display device

Abstract

Provided is an image display device in which deterioration of a self-light-emitting element within a pixel is corrected accurately. A detection unit detects, within a detection period, a difference in characteristics between self-light-emitting elements of adjacent pixels. A first subtraction circuit outputs a differential voltage between a reference voltage and an image voltage to a self-light-emitting element that is determined by the detection unit as a deteriorated element. An amplifier amplifies an output of the first subtraction circuit with a gain [1/{1-(α/100)}]1/2 when a driver transistor is driven in a saturation region. The amplifier amplifies the output of the first subtraction circuit with a gain [1/{1-(α/100)}] when the driver transistor is driven in a linear region. A differential between the reference voltage and an output of the amplifier obtained by a second subtraction circuit is used as a corrected image voltage.

Claims18

Dependent claims

An image display device, comprising:

a plurality of pixels each including a self-light-emitting element and a driver transistor for driving the self-light-emitting element, the driver transistor being driven in a saturation region;
a plurality of signal lines through which an image voltage is input to the plurality of pixels;
detection means for detecting a difference in characteristics between the self-light-emitting elements of two adjacent pixels among the plurality of pixels;
a first calculation means for calculating a differential voltage between a reference voltage and the image voltage for the self-light-emitting element of the pixel that has been determined as a deteriorated self-light-emitting element by the detection means;
a second calculation means for multiplying a result of calculation made by the first calculation means by a non-linear light emission correction amount;
and
a third calculation means for subtracting a result of calculation made by the second calculation means from the reference voltage to obtain a corrected image voltage.

4 more elements

An image display device, comprising:

a plurality of pixels each including a self-light-emitting element and a driver transistor for driving the self-light-emitting element, the driver transistor being driven in a linear region;
a plurality of signal lines through which an image voltage is input to the plurality of pixels;
detection means for detecting a difference in characteristics between the self-light-emitting elements of two adjacent pixels among the plurality of pixels;
a first calculation means for calculating a differential voltage between a reference voltage and the image voltage for the self-light-emitting element of the pixel that has been determined as a deteriorated self-light-emitting element by the detection means;
a second calculation means for multiplying a result of calculation made by the first calculation means by a linear light emission correction amount;
and
a third calculation means for subtracting a result of calculation made by the second calculation means from the reference voltage to obtain a corrected image voltage.

4 more elements

An image display device, comprising:

a plurality of pixels each including a self-light-emitting element and a driver transistor for driving the self-light-emitting element;
a plurality of signal lines through which an image voltage is input to the plurality of pixels;
first driving means for driving the driver transistor in a saturation region;
second driving means for driving the driver transistor in a linear region;
detection means for detecting a difference in characteristics between the self-light-emitting elements of two adjacent pixels among the plurality of pixels;
a first calculation means for calculating a differential voltage between a reference voltage and the image voltage for the self-light-emitting element of the pixel that has been determined as a deteriorated self-light-emitting element by the detection means;
a second calculation means for multiplying a result of calculation made by the first calculation means by a non-linear light emission correction amount when the first driving means drives the driver transistor in the saturation region;
a third calculation means for subtracting a result of calculation made by the second calculation means from the reference voltage to obtain a corrected image voltage;
a fourth calculation means for multiplying the result of the calculation made by the first calculation means by a linear light emission correction amount when the second driving means drives the driver transistor in the linear region;
and
a fifth calculation means for subtracting a result of calculation made by the fourth calculation means from the reference voltage to obtain the corrected image voltage.

8 more elements

Dependencies are inferred from the claim text.

Image display device

Life of this patent

Image display device

Life of this patent

Abstract

Claims18