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US 11,144,143 B2Granted
Touch display panel and device
AssigneeLG Display Co., Ltd.
InventorsSungChul Kim, HoonBae Kim, SunYeop Kim, Seongkyu Kang
Life of this patent
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Abstract
A touch display panel and a touch display device are discussed. A data voltage, supplied to subpixels corresponding to a touch electrode, has a polarity pattern configured to minimize the cumulative transition value of the data voltage. Noise in touch sensing signals, caused by the transition of the data voltage, can be prevented, and touch sensing performance can be improved. A data voltage having polarities opposite to those of a previous frame is supplied in every specific frames, or some subpixels of a frame are set to have opposite polarities. Deteriorations in subpixels, caused by inversion driving for improving touch sensing performance, can be prevented.
Claims16
A touch display device comprising:
- a plurality of touch electrodes disposed in a panel;
- a plurality of subpixels corresponding to one touch electrode among the plurality of touch electrodes and arrayed in P number of rows and Q number of columns, where P and Q are positive numbers;
- a plurality of data lines connected to the plurality of subpixels;
- and
- a data driver circuit configured to supply a data voltage having a first polarity and a data voltage having a second polarity to the plurality of data lines,
- wherein subpixels arrayed in R number of rows and the Q number of columns, among the plurality of subpixels corresponding to the one touch electrode among the plurality of touch electrodes, constitute a single subpixel block, where P≥R≥2 and R is a positive number,
- the plurality of data lines are comprised of N number of data line groups respectively including 2K number of adjacent data lines among the plurality of data lines, where N and K are positive numbers,
- in the single subpixel block, a total of differences, from a difference between a data voltage supplied ith and a data voltage supplied (i+1)th to each of data lines of a first data line group among the N number of data line groups to a difference between a data voltage supplied ith and a data voltage supplied (i+1)th to each of data lines of the Nth data line group among the N number of data line groups, is within a predetermined range from a predetermined value, where i is a positive number, and
- in the single subpixel block, polarities of data voltages, supplied Yth to data lines of an Xth data line group, among the plurality of data lines, in a next frame, are opposite to polarities of data voltages supplied Yth to the data lines of the Xth data line group in a current frame, where N≥X≥1 and Y is a positive number.
6 more elements
A touch display device comprising:
- a plurality of touch electrodes disposed in a panel;
- a plurality of subpixels corresponding to one touch electrode among the plurality of touch electrodes;
- a plurality of data lines connected to the plurality of subpixels;
- and
- a data driver circuit configured to supply a data voltage having a first polarity and a data voltage having a second polarity to the plurality of data lines,
- wherein the plurality of data lines are comprised of N number of data line groups respectively including 2K number of adjacent data lines among the plurality of data lines, where N and K are positive numbers,
- in a first frame to a (Z−1)th frame among Z number of frames, a total of differences, from a difference between a data voltage supplied ith and a data voltage supplied (i+1)th to each of data lines of a first data line group among the N number of data line groups to a difference between a data voltage supplied ith and a data voltage supplied (i+1)th to each of data lines of the Nth data line group among the N number of data line groups, is within a predetermined range from a predetermined value, where Z≥2 and i is a positive number, and
- a polarity of a data voltage, supplied Yth to each of the plurality of data lines in a Zth frame among the Z number of frames, is opposite to a polarity of a data voltage supplied Yth to each of the plurality of data lines in the (Z−1)th frame, where Y is a positive number.
5 more elements
A touch display panel comprising:
- a plurality of touch electrodes on a substrate;
- a plurality of subpixels corresponding to one touch electrode among the plurality of touch electrodes;
- a plurality of data lines connected to the plurality of subpixels;
- and
- a data driver circuit configured to supply a data voltage having a first polarity and a data voltage having a second polarity to the plurality of data lines,
- wherein the plurality of data lines are comprised of N number of data line groups respectively including 2K number of adjacent data lines among the plurality of data lines, where N and K are positive numbers,
- a total of differences, from a difference between a data voltage supplied ith and a data voltage supplied (i+1)th to each of data lines of a first data line group among the N number of data line groups to a difference between a data voltage supplied ith and a data voltage supplied (i+1)th to each of data lines of the Nth data line group among the N number of data line groups, is within a predetermined range from a predetermined value, where i is a positive number, and
- in at least one data line group among the N number of data line groups, a polarity of a data voltage, supplied Yth in a next frame, is opposite to a polarity of a data voltage supplied Yth in a current frame, where Y is a positive number.
5 more elements
Dependencies are inferred from the claim text.