# US 12,602,131 B2 · Display device and driving method of the same

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- Number: US 12,602,131 B2
- Document ID: US12602131B2
- Status: Granted
- Kind: B2
- Application number: 18/807,816
- Filed: 2024-08-16
- Published: 2025-07-10
- Granted: 2026-04-14
- Earliest claimed: 2024-01-09
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Ji Hoon Kim; Jang Hui Kim; Keum Dong Jung
- Web page: https://patentgrep.com/patent/US12602131B2

## CPC

- G06F 3/041662: {using alternate mutual and self-capacitive scanning}
- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/04162: {for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware}
- G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)}
- G06F 3/0441: {using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals}
- G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

A display device includes a touch array including driving electrodes that extend in a first direction, and that are arranged in a second direction crossing the first direction, and sensing electrodes that extend in the second direction, and that are arranged in the first direction, and a touch driver configured to transmit uplink signals to an external device adjacent to the touch array through the driving electrodes and the sensing electrodes in a third sensing mode, and to sense a touch by applying a mutual driving signal to the touch array in a first sensing mode, the external device being configured to calculate position information using the uplink signals.

## Claims

### Claim 1

A display device comprising:
a touch array comprising:
driving electrodes that extend in a first direction, and that are arranged in a second direction crossing the first direction; and
sensing electrodes that extend in the second direction, and that are arranged in the first direction; and
a touch driver configured to:
transmit uplink signals to an external device adjacent to the touch array through the driving electrodes and the sensing electrodes in a third sensing mode;
sense a touch by applying a mutual driving signal to the touch array in a first sensing mode, the external device being configured to calculate position information by decoding the uplink signals;
supply charges to self-capacitances respectively formed in the driving electrodes and the sensing electrodes by applying a self-driving signal to the driving electrodes and the sensing electrodes in a second sensing mode;
sense a touch adjacent to first areas of the touch array to the exclusion of second areas of the touch array in the first sensing mode; and
sense a touch adjacent to the second areas of the touch array to the exclusion of the first areas in the first sensing mode,
wherein the touch driver is configured to sequentially sense the touch adjacent to the touch array in the second sensing mode, sense the touch adjacent to the first areas of the touch array in the first sensing mode, transmit the uplink signals through the touch array in the third sensing mode, and sense the touch adjacent to the second areas of the touch array in the first sensing mode.

### Claim 2 (depends on 1)

The display device of claim 1, wherein a mutual capacitance is formed between an adjacent pair of one of the driving electrodes and one of the sensing electrodes, and
wherein the touch driver is further configured to apply the mutual driving signal to the driving electrodes in the first sensing mode, and to sense a change in the mutual capacitance through a mutual sensing signal received from the sensing electrodes.

### Claim 3 (depends on 1)

The display device of claim 1, wherein the touch driver is further configured to sense a change in the self-capacitances.

### Claim 4 (depends on 3)

The display device of claim 3, wherein a period in which the touch driver is configured to transmit the uplink signals in the third sensing mode, a period in which the touch driver is configured to sense the touch in the first sensing mode, and a period in which the touch driver is configured to sense the touch in the second sensing mode, are different from one another.

### Claim 5

A method of driving a display device comprising a touch array comprising driving electrodes extending in a first direction and arranged in a second direction crossing the first direction, and sensing electrodes extending in the second direction and arranged in the first direction, the method comprising:
transmitting uplink signals to an external device adjacent to the touch array in a third sensing mode such that the external device calculates position information using the uplink signals;
sensing a touch adjacent to the touch array by applying a mutual driving signal to first ones of the driving electrodes to the exclusion of second ones of the driving electrodes, and subsequently applying the mutual driving signal to the second ones of the driving electrodes to the exclusion of the first ones of the driving electrodes, in a first sensing mode;
sensing a touch adjacent to the touch array by applying a self-driving signal to the driving electrodes and to the sensing electrodes in a second sensing mode;
sensing a touch adjacent to first areas of the touch array to the exclusion of second areas of the touch array in the first sensing mode; and
sensing a touch adjacent to the second areas of the touch array to the exclusion of the first areas in the first sensing mode,
wherein the sensing the touch adjacent to the touch array in the second sensing mode, the sensing the touch adjacent to the first areas of the touch array in the first sensing mode, the transmitting the uplink signals through the touch array in the third sensing mode, and the sensing the touch adjacent to the second areas of the touch array in the first sensing mode are sequentially performed.

### Claim 6 (depends on 5)

The method of claim 5, further comprising forming a mutual capacitance between an adjacent pair of one of the driving electrodes and one of the sensing electrodes, and
wherein the sensing the touch adjacent to the touch array in the first sensing mode comprises:
applying the mutual driving signal to the driving electrodes;
receiving a mutual sensing signal from the sensing electrodes; and
sensing a change in the mutual capacitance through the mutual sensing signal.

### Claim 7 (depends on 5)

The method of claim 5, wherein the sensing the touch adjacent to the touch array in the second sensing mode, the sensing the touch adjacent to the touch array in the first sensing mode, and the transmitting the uplink signals through the touch array in the third sensing mode are sequentially performed.

### Claim 8 (depends on 5)

The method of claim 5, wherein the sensing the touch adjacent to the touch array in the second sensing mode, the transmitting the uplink signals through the touch array in the third sensing mode, and the sensing the touch adjacent to the touch array in the first sensing mode are sequentially performed.

### Claim 9

A method of driving a display device comprising a touch array comprising dot electrodes comprising first to zth groups arranged in a first direction and in a second direction crossing the first direction, and not overlapping each other, the method comprising:
transmitting uplink signals through the touch array in a third sensing mode such that an external device adjacent to the touch array is configured to calculate position information using the uplink signals;
sensing a touch adjacent to the touch array by applying a self-driving signal to the dot electrodes in a second sensing mode; and
sequentially:
sensing a touch adjacent to a first plurality of the dot electrodes of the second to zth groups in the second sensing mode;
transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode; and
sensing a touch adjacent to a second plurality of the dot electrodes of the second to zth groups, which is different from the first plurality of the dot electrodes, in the second sensing mode,
wherein z is a positive integer.

### Claim 10 (depends on 9)

The method of claim 9, further comprising forming a self-capacitance in the dot electrodes,
wherein the sensing the touch adjacent to the touch array in the second sensing mode comprises:
supplying charges to the self-capacitance of the dot electrodes by applying the self-driving signal to the dot electrodes; and
sensing a change in the self-capacitance of the dot electrodes.

### Claim 11 (depends on 9)

The method of claim 9, further comprising concurrently or substantially simultaneously:
transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode; and
sensing a touch adjacent to dot electrodes of the second to zth groups in the second sensing mode.

### Claim 12 (depends on 11)

The method of claim 11, wherein the transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode comprises:
separating the dot electrodes of the first group into row groups;
sequentially transmitting the uplink signals for the row groups;
separating the dot electrodes of the first group into column groups; and
sequentially transmitting the uplink signals for the column groups.

### Claim 13 (depends on 9)

The method of claim 9, further comprising sequentially:
transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode; and
sensing a touch adjacent to dot electrodes of the second to zth groups in the second sensing mode.

### Claim 14 (depends on 13)

The method of claim 13, wherein the transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode comprises:
separating the dot electrodes of the first group into row groups;
sequentially transmitting the uplink signals for the row groups;
separating the dot electrodes of the first group into column groups; and
sequentially transmitting the uplink signals for the column groups.

### Claim 15 (depends on 9)

The method of claim 9, further comprising sequentially:
sensing a touch adjacent to the dot electrodes of the second to zth groups in the second sensing mode; and
transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode.

### Claim 16 (depends on 15)

The method of claim 15, wherein the transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode comprises:
separating the dot electrodes of the first group into row groups;
sequentially transmitting the uplink signals for the row groups;
separating the dot electrodes of the first group into column groups; and
sequentially transmitting the uplink signals for the column groups.

### Claim 17 (depends on 9)

The method of claim 9, wherein the transmitting the uplink signals through the dot electrodes of the first group in the third sensing mode comprises:
separating the dot electrodes of the first group into row groups;
sequentially transmitting the uplink signals for the row groups;
separating the dot electrodes of the first group into column groups; and
sequentially transmitting the uplink signals for the column groups.