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US 10,504,391 B2Granted
Data driver and display device using the same
AssigneeLG Display Co., Ltd.
InventorsMyunggi Lim, Kyoungdon Woo, Seokhyun Hong, Hyuckjun Kim
Life of this patent
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Abstract
A display device comprises a display panel that displays an image and has a data line and a sensing line, a data driver that drives the display panel, and a power supply part that delivers a driving reference voltage through a wiring line connected to the data driver. The data driver supplies a data signal to the data line, supplies the driving reference voltage through the sensing line, senses the sensing line based on an internally generated sensing reference voltage, and integrates a sensing result.
Claims11
A display device comprising:
- a display panel that displays an image and has a data line and a sensing line;
- a data driver that drives the display panel;
- and
- a power supply part that delivers a driving reference voltage through a wiring line connected to the data driver,
- wherein the data driver supplies a data signal to the data line, supplies the driving reference voltage through the sensing line, senses the sensing line based on an internally generated sensing reference voltage, and integrates a sensing result wherein the data driver comprises:
- an integration circuit part for sensing the sensing line based on the sensing reference voltage;
- and
- an offset correction part that corrects for variations in the sensing reference voltage, along with the integration circuit part, by using the driving reference voltage as a reference,
- wherein the integration circuit part comprises:
- an amp circuit, a first terminal of which is connected to a first terminal of the offset correction part;
- an integrating capacitor, one end of which is connected to a second terminal of the amp circuit, and another end of which is connected to an output terminal of the amp circuit;
- and
- a reset switch, one end of which is connected to the second terminal of the amp circuit, and another end of which is connected to the output terminal of the amp circuit.
10 more elements
A data driver comprising:
- an integration circuit part that applies an externally supplied driving reference voltage to an external sensing line, senses the external sensing line based on an internally generated sensing reference voltage, and integrates a sensing result;
- and
- an offset correction part that corrects for variations in the sensing reference voltage, along with the integration circuit part, by using the driving reference voltage as a reference,
- wherein the integration circuit part comprises:
- an amp circuit, a first terminal of which is connected to a first terminal of the offset correction part;
- an integrating capacitor, one end of which is connected to a second terminal of the amp circuit, and another end of which is connected to an output terminal of the amp circuit;
- and
- a reset switch, one end of which is connected to the second terminal of the amp circuit, and another end of which is connected to the output terminal of the amp circuit.
5 more elements
Dependencies are inferred from the claim text.