Samsung Display Co., Ltd.

Hayong Jung

Wook Su Lee

Sung Hwan Kim

Jaehoon Shin

Jung-taek Kim

Joonsuk Baik

Wook Jae Lee

A sensing driver includes a sensing channel which samples a first sensing voltage of a first sensing line in a first sampling period, samples a second sensing voltage of a second sensing line in a second sampling period, and includes a sampling capacitor, a first line selection switch which connects the first sensing line to the sensing channel in a first sub-sensing period, and a second line selection switch which connects the second sensing line to the sensing channel in a second sub-sensing period. A voltage having a first initialization level is applied to a first electrode of the sampling capacitor in a first capacitor initialization period, and a voltage having a second initialization level different from the first initialization level is applied to the first electrode of the sampling capacitor in a second capacitor initialization period.

Sensing driver, method of driving the same, and display device including the same

Disclosed is a display device including a display panel, a sensing driver, and a voltage generator. The display panel includes a sensing line, a pixel connected to the sensing line, and a first driving voltage line connected to the pixel. The pixel includes a light emitting element connected between the sensing line and the first driving voltage line. The sensing driver senses a sensing voltage through the sensing line during a sensing period. The voltage generator supplies a first driving voltage to the first driving voltage line. During the sensing period, the voltage generator varies the first driving voltage over time based on a change in the sensing voltage.

Display device including a voltage generator

A method of compensating for an output of a data driver of a display device includes measuring a first output value of a sensing circuit that senses pixels by applying an external voltage to the sensing circuit, measuring second output values of the sensing circuit by applying output voltages within an output range of the data driver to the sensing circuit through output amplifiers of the data driver, generating a compensation look-up table based on the first output value and the second output values, and compensating for the output voltages of the data driver based on the compensation look-up table.

Method of compensating for an output of a data driver

A sensing circuit of a display device includes a sensing line initialization circuit which substantially simultaneously initializes a first sensing line and a second sensing line in a first sub-sensing period of a sensing period, a first line selection switch which couples the first sensing line to a sensing channel in the first sub-sensing period, a second line selection switch which couples the second sensing line to the sensing channel in a second sub-sensing period of the sensing period, and the sensing channel which samples a first sensing voltage of the first sensing line in a first sampling period of the first sub-sensing period, and samples a second sensing voltage of the second sensing line in a second sampling period of the second sub-sensing period. The second sensing line is not initialized during a period from the first sampling period to the second sampling period.

Sensing circuit, display device and method of operating a sensing circuit

A sensing circuit includes a first line selection switch which connects a first sensing line to a sensing channel in a first sub-sensing period, a first noise selection switch which connects the first sensing line to a reference channel in a second sub-sensing period, a second line selection switch which connects a second sensing line to the sensing channel in the second sub-sensing period, and a second noise selection switch which connects the second sensing line to the reference channel in the first sub-sensing period. The sensing channel samples a first sensing voltage and noise of the first sensing line and the reference channel samples noise of the second sensing line in a first sampling period, and the sensing channel samples a second sensing voltage and noise of the second sensing line and the reference channel samples noise of the first sensing line in a second sampling period.

Sensing circuit, display device including sensing circuit, and method of driving sensing circuit

A sensing circuit includes a first input selecting circuit connected to a first sensing line and a second sensing line, a first path setting circuit that sets a path of a first sensing signal received from the first sensing line or a path of a second sensing signal received from the second sensing line, a second path setting circuit that sets a path of a sensing reference voltage, a first switch matrix connected to the first path setting circuit and the second path setting circuit, a first mode setting circuit connected to a first output terminal of the first switch matrix, a first common sensing amplifier connected to the first mode setting circuit, a second mode setting circuit connected to a second output terminal of the first switch matrix, and a second common sensing amplifier connected to the second mode setting circuit.

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Hwaseong-si, South Korea

Hayong Jung