Granted Patent B2

US 12,585,357 · App. 19/054,647 · Granted Mar 24, 2026

Inventors: Kyounghun Been (Yongin-si, KR); Hyojin Lee (Yongin-si, KR); Byeongkyu Jeon (Yongin-si, KR)

Assignee: Samsung Display Co., Ltd.

G06F3/0418G06F3/04162G06F3/04166

Abstract

Claims (58)

1 . An electronic device comprising:

a display layer configured to display an image;

a driving controller configured to receive an input image signal and a control signal and to output a horizontal synchronization signal and image data;

a data driving circuit configured to provide a data signal to the display layer in response to the horizontal synchronization signal and the image data;

a sensor layer on the display layer; and

a sensor driver configured to drive the sensor layer and to receive sensing signals from the sensor layer,

wherein the sensor driver is configured to:

output a horizontal synchronization control signal of a first level during a touch sensing mode of detecting a touch input; and

output the horizontal synchronization control signal of a second level different from the first level during a pen sensing mode of detecting a pen input, and

wherein the driving controller is configured to change a horizontal period of the horizontal synchronization signal in response to the horizontal synchronization control signal.

2 . The electronic device of claim 1 , wherein the driving controller is configured to:

output the horizontal synchronization signal including a first horizontal period based on the horizontal synchronization control signal being at the first level; and

output the horizontal synchronization signal including a second horizontal period different from the first horizontal period based on the horizontal synchronization control signal being at the second level.

3 . The electronic device of claim 2 , wherein the second horizontal period of the horizontal synchronization signal is set such that a frequency of noise included in the sensing signals does not overlap a frequency of a downlink signal from an input device.

4 . The electronic device of claim 2 , wherein the horizontal synchronization signal includes a plurality of pulses, and

wherein each of the plurality of pulses includes the second horizontal period during the pen sensing mode.

5 . The electronic device of claim 2 , wherein the horizontal synchronization signal includes a plurality of pulses, and

wherein a time of the second horizontal period of each of the plurality of pulses is differently set during the pen sensing mode.

6 . The electronic device of claim 1 , wherein the driving controller is configured to:

output the horizontal synchronization signal including a first back porch period based on the horizontal synchronization control signal being at the first level; and

output the horizontal synchronization signal including a second back porch period different from the first back porch period based on the horizontal synchronization control signal being at the second level.

7 . The electronic device of claim 1 , wherein the driving controller is configured to:

output the horizontal synchronization signal including a first horizontal blank period based on the horizontal synchronization control signal being at the first level; and

output the horizontal synchronization signal including a second horizontal blank period different from the first horizontal blank period based on the horizontal synchronization control signal being at the second level.

8 . The electronic device of claim 1 , wherein the sensor driver is configured to:

determine a frequency of noise based on the sensing signals based on an approach of an input device being detected in the touch sensing mode; and

output the horizontal synchronization control signal of the second level based on the frequency of the noise overlapping a downlink frequency of the input device.

9 . The electronic device of claim 1 , wherein the sensor driver is configured to:

determine an amplitude of noise based on the sensing signals based on an approach of an input device being detected in the touch sensing mode; and

output the horizontal synchronization control signal of the second level based on the amplitude of the noise being greater than a reference value.

10 . The electronic device of claim 1 , wherein the driving controller is configured to output a noise pattern signal of an active level based on a pattern of the input image signal being a noise pattern.

11 . The electronic device of claim 10 , wherein the sensor driver is configured to output the horizontal synchronization control signal of the second level based on an approach of an input device being detected in the touch sensing mode and the noise pattern signal being at the active level.

12 . A method of driving an electronic device, the method comprising:

operating in a touch sensing mode of detecting a touch input;

outputting a horizontal synchronization control signal of a first level;

outputting a horizontal synchronization signal of a first horizontal period in response to the horizontal synchronization control signal of the first level;

determining whether an input device is approaching;

outputting the horizontal synchronization control signal of a second level different from the first level based on an approach of the input device being detected; and

outputting the horizontal synchronization signal of a second horizontal period in response to the horizontal synchronization control signal of the second level.

13 . The method of claim 12 , further comprising:

displaying an image on a display layer in response to the horizontal synchronization signal; and

receiving sensing signals from a sensor layer on the display layer.

14 . The method of claim 13 , wherein the second horizontal period of the horizontal synchronization signal is set such that a frequency of noise included in the sensing signals does not overlap a frequency of a downlink signal from the input device.

15 . The method of claim 13 , wherein the outputting of the horizontal synchronization control signal of the second level different from the first level based on the approach of the input device being detected includes:

determining a frequency of noise based on the sensing signals; and

outputting the horizontal synchronization control signal of the second level based on the frequency of the noise overlapping a downlink frequency of the input device.

16 . The method of claim 13 , wherein the outputting of the horizontal synchronization control signal of the second level different from the first level based on the approach of the input device being detected includes:

determining an amplitude of noise based on the sensing signals; and

outputting the horizontal synchronization control signal of the second level based on the amplitude of the noise being greater than a reference value.

17 . The method of claim 12 , wherein the horizontal synchronization signal includes a first back porch period based on the horizontal synchronization control signal being at the first level, and

wherein the horizontal synchronization signal includes a second back porch period different from the first back porch period based on the horizontal synchronization control signal being at the second level.

18 . The method of claim 12 , wherein the horizontal synchronization signal includes a first horizontal blank period based on the horizontal synchronization control signal being at the first level, and

wherein the horizontal synchronization signal includes a second horizontal blank period different from the first horizontal blank period based on the horizontal synchronization control signal being at the second level.

19 . The method of claim 12 , wherein the horizontal synchronization signal includes a plurality of pulses, and

wherein a time of the second horizontal period of each of the plurality of pulses of the horizontal synchronization signal is differently set based on the approach of the input device being detected.

20 . The method of claim 12 , further comprising:

determining whether a pattern of an input image signal is a noise pattern,

wherein the outputting of the horizontal synchronization control signal of the second level different from the first level based on the approach of the input device being detected includes outputting the horizontal synchronization control signal of the second level based on the pattern of the input image signal being the noise pattern.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (16)