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US 2022/0189416 A1Published application
Data driving circuit and display device
AssigneeLG Display Co., Ltd.
InventorsJinhee Jung, MooKyoung Hong
Life of this patent
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Abstract
Two or more sensing switches are included in a sensing unit for detecting a characteristic value of a subpixel, and are electrically coupled to a reference voltage line. The two or more sensing switches share a sampling switch with a sensing capacitor included in the sensing unit, which reduces size of the sensing unit. Sensing may include driving simultaneously two or more sensing switches sharing a sensing capacitor, or sensing may be performed through continuous and short driving after simultaneous driving. Overall sensing time can be reduced and sensing accuracy improved.
Claims19
A display device comprising:
- a plurality of subpixels disposed on a display panel;
- a plurality of reference voltage lines electrically coupled to a part of the plurality of subpixels;
- and
- a data driving circuit configured to drive the plurality of reference voltage lines,
- wherein the data driving circuit includes:
- a plurality of first switches electrically coupled to each of the plurality of reference voltage lines;
- a capacitor electrically coupled to two or more first switches included in a group among the plurality of first switches;
- and
- a second switch electrically coupled to the capacitor,
- wherein the two or more first switches included in the group are configured to be turned on substantially simultaneously during at least a part of a period for detecting a value of the subpixel through a reference voltage line electrically coupled to one of the two or more first switches among the plurality of reference voltage lines.
7 more elements
A display device comprising:
- a plurality of subpixels disposed on a display panel;
- a plurality of reference voltage lines electrically coupled to some of the plurality of subpixels;
- and
- a data driving circuit configured to drive the plurality of reference voltage lines,
- wherein the data driving circuit includes:
- a first sensing switch electrically coupled to a first reference voltage line among the plurality of reference voltage lines, and a second sensing switch electrically coupled to a second reference voltage line among the plurality of reference voltage lines;
- a sensing capacitor electrically coupled to the first sensing switch and the second sensing switch;
- and
- a sampling switch electrically coupled to the sensing capacitor,
- wherein the data driving circuit is configured to detect a characteristic value of the subpixel by the first reference voltage line when the first sensing switch is turned on in a first sensing period, and to detect the characteristic value of the subpixel by the second reference voltage line when the second sensing switch is turned on in a second sensing period,
- wherein, in a display driving period between the first sensing period and the second sensing period, a compensation voltage determined based on the characteristic value of the subpixel detected through the first reference voltage line is supplied to the subpixel electrically coupled to the first reference voltage line and the subpixel electrically coupled to the second reference voltage line.
8 more elements
A data driving circuit comprising:
- a plurality of sensing switches electrically coupled to each of a plurality of reference voltage lines;
- a sensing capacitor electrically coupled to two or more sensing switches included in one sensing group among the plurality of sensing switches;
- and
- a sampling switch electrically coupled to the sensing capacitor,
- wherein the two or more sensing switches included in the one sensing group are configured to be turned on substantially simultaneously during at least a part of a sensing period for detecting a characteristic value of a subpixel through a reference voltage line electrically coupled to the two or more sensing switches among the plurality of reference voltage lines.
2 more elements
Dependencies are inferred from the claim text.