Electronic device and method for extending time interval during which upscaling is performed on basis of horizontal synchronization signal

Patent metadata

Field	Value
Publication number	US-2022036853-A1
Application number	US-201917277539-A
Country	US
Kind code	A1
Filing date	Sep 19, 2019
Priority date	Sep 21, 2018
Publication date	Feb 3, 2022
Grant date	—

Abstract

An electronic device according to various embodiments may include a display panel, a Display Driving Integrated Circuit (DDIC) operatively coupled to the display panel, and a processor operatively coupled to the DDIC. The DDIC may be configured to receive, from the processor, a signal indicating that a first resolution is to be converted to a second resolution while displaying an image at the first resolution through the display panel, based on a horizontal synchronization signal including a first porch interval, change a length of the porch interval in response to the reception, and display the image at the second resolution through the display panel, based on the horizontal synchronization signal including the porch interval having the changed length.

First claim

1 . An electronic device comprising:
a display panel; a Display Driving Integrated Circuit (DDIC) operatively coupled to the display panel; and a processor operatively coupled to the DDIC, wherein the DDIC is configured to: receive, from the processor, first data to display an image at a first resolution, which is transmitted based on a horizontal synchronization signal including a first porch interval; obtain second data to display the image at a second resolution higher than the first resolution, based at least on the first data; and display the image at the second resolution by using the display panel, based on the obtained second data, wherein a length of the first porch interval is longer than a length of a second porch interval included in a horizontal synchronization signal used to display the image at the first resolution.

2 . The electronic device of claim 1 , wherein the length of the first porch interval is longer than a length of a time interval for receiving the first data.

3 . The electronic device of claim 2 , wherein the second data is used to display part of the image at the second resolution in at least part of a line among a plurality of horizontal lines configuring a display area of the display panel.

4 . The electronic device of claim 3 , wherein the DDIC is configured to obtain the second data further based on third data received based on the horizontal synchronization signal including the first porch interval from the processor to display the image at the first resolution in another line below the line among the plurality of horizontal lines.

5 . The electronic device of claim 1 , wherein the DDIC is configured to obtain the second data converted from the first data by up-scaling the first data.

6 . The electronic device of claim 5 , wherein the DDIC is further configured to generate a virtual horizontal synchronization signal configured to perform the up-scaling of the first data every period shorter than a period of the horizontal synchronization signal including the first porch interval.

7 . The electronic device of claim 6 , wherein the virtual horizontal synchronization signal is generated within a time interval corresponding to the first porch interval.

8 . The electronic device of claim 1 , wherein the DDIC does not include an internal memory which records the first data received from the processor.

9 . The electronic device of claim 1 , wherein the DDIC is operatively coupled to the processor through a Mobile Industry Processor Interface (MIPI), and is configured to receive the first data for displaying the image at the first resolution, based on a video mode of the MIPI.

10 . The electronic device of claim 1 , wherein the first porch interval includes at least one of a front porch interval of the horizontal synchronization signal and a back porch interval of the horizontal synchronization signal.

11 . The electronic device of claim 1 , wherein a length of the first porch interval is changed depending on a relative ratio of the first resolution and the second resolution.

12 . The electronic device of claim 1 , wherein the DDIC is configured to obtain the second data, based at least on the first data, within the first porch interval having the length longer than the second porch interval.

13 - 15 . (canceled)

16 . An electronic device comprising:
a display panel; a Display Driving Integrated Circuit (DDIC) operatively coupled to the display panel; and a processor operatively coupled to the DDIC, wherein the DDIC is configured to: receive a signal for indicating that the first resolution is changed to the second resolution from the processor, during the image is displayed at the first resolution, based on the horizontal synchronization signal including the second porch interval; change the length of the second porch interval to the length of the first porch interval, in response to the reception; and display the image at the second resolution through the display panel, based on the horizontal synchronization signal having the changed length of the first porch interval.

17 . The electronic device of claim 16 , wherein the DDIC is configured to change the length of the porch section based on a ratio of the first resolution to the second resolution in response to the reception.

18 . The electronic device of claim 16 , wherein the DDIC is configured to:
obtain another data by up-scaling data received from the processor within the porch section having the changed length, and display the image at the second resolution through the display panel using the obtained another data.

19 . The electronic device of claim 18 , wherein the another data is obtained before another horizontal synchronization signal subsequent to the horizontal synchronization signal is generated.

20 . The electronic device of claim 18 , wherein the DDIC is configured to generate the virtual horizontal synchronization signal for identifying a timing for obtaining the another data, before the another horizontal synchronization signal subsequent to the horizontal synchronization signal is generated, and the number of the virtual horizontal synchronization signal is identified based on a ratio of the first resolution to the second resolution.

21 . The electronic device of claim 18 , further comprising:
a first interface connecting to the processor and the DDIC; and a second interface connecting the processor and the DDIC, wherein the signal is transmitted from the processor to the DDIC through the first interface, and wherein the data is transmitted from the processor to the DDIC through the second interface.

22 . The electronic device of claim 21 , wherein the second interface comprises a Mobile Industry Processor Interface (MIPI), and
wherein the DDIC is configured to receive the signal, change the length of the porch section in response to the reception, and display the image at the second resolution based on the horizontal synchronization signal including the porch section having the changed length, based on a video mode of the MIPI.

23 . The electronic device of claim 16 , wherein the porch interval having the changed length corresponds to a front porch interval of the horizontal synchronization signal or a back porch interval of the horizontal synchronization signal.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Bae Jongkon
• Kim Hojin
• Lee Yohan
• Hong Yunpyo
• Kim Donghui
• Seo Eunsook
• Han Dongkyoon

Classifications

• G09G5/18

  Timing circuits for raster scan displays (specially adapted for television H04N {; synchronisation between the display unit and other display units, videodisc player G09G5/12}) · CPC title

• G09G2340/04

  Changes in size, position or resolution of an image · CPC title

• G09G2340/0414

  Vertical resolution change · CPC title

• G09G5/391 Primary

  Resolution modifying circuits, e.g. variable screen formats · CPC title

• G09G2340/0435

  Change or adaptation of the frame rate of the video stream · CPC title