US 11,892,895 B2
Display device
Jung Min Choi, Daejeon (KR)
Assigned to SILICON WORKS CO., LTD., Daejeon (KR)
Filed by SILICON WORKS CO., LTD., Daejeon (KR)
Filed on Jul. 25, 2022, as Appl. No. 17/872,905.
Application 17/872,905 is a continuation of application No. 17/082,854, filed on Oct. 28, 2020, granted, now 11,422,612.
Claims priority of application No. 10-2019-0147414 (KR), filed on Nov. 18, 2019.
Prior Publication US 2022/0357790 A1, Nov. 10, 2022
Int. Cl. G09G 3/20 (2006.01); G06F 1/3234 (2019.01)
CPC G06F 1/3265 (2013.01) [G09G 3/20 (2013.01); G09G 2310/08 (2013.01); G09G 2330/023 (2013.01); G09G 2330/028 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for processing a synchronization signal in a first integrated circuit, the method comprising:
generating a first synchronization signal as a touch synchronization signal that is divided into a display period set for displaying image data and a touch period set for a touch sensing operation; and
transmitting the first synchronization signal to a second integrated circuit which is included in a source readout integrated circuit, wherein
a first portion of the second integrated circuit is configured to operate in a low power mode during a touch period based on the first synchronization signal, and
a second portion of the second integrated circuit is configured to operate in the low power during a display period based on the first synchronization signal.
 
6. An integrated circuit comprising:
a first circuit configured to display image data; and
a second circuit configured to sense a touch or a proximity of an external object, wherein
the first circuit is configured to operate in a low power mode while the touch or the proximity of the external object is sensed,
the second circuit is configured to operate in the low power mode while the image data is displayed,
the integrated circuit is configured to receive a signal of a shared voltage which is commonly used in the first circuit and the second circuit from an external circuit,
the shared voltage comprises a first voltage level while the touch or the proximity of the external object is sensed by the second circuit, and a second voltage level that is different from the first voltage level while the image data is displayed by the first circuit,
the integrated circuit is configured to receive a control signal from a control circuit, the control signal controlling low power operations of the first circuit and the second circuit, and
the control signal comprises a touch synchronization signal that indicates a first time section where the image data is displayed on a panel and a second time section where the touch or the proximity of the external object is sensed.
 
13. A method for controlling power in a touch modulation integrated circuit, the method comprising:
receiving a first synchronization signal as a touch synchronization signal;
receiving a second synchronization signal as a power synchronization signal that is different from the first synchronization signal; and
outputting a common voltage signal for sensing a touch or a proximity of an external object during a touch period set for touch sensing operation, based on the first synchronization signal, wherein
the touch modulation integrated circuit is configured to operate in a low power mode during the touch period based on the second synchronization signal, and
the touch modulation integrated circuit is configured to receive the second synchronization signal from at least one of a microcontroller or a timing controller.