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EP-3843079-B1 - ELECTRONIC DEVICE AND METHOD FOR EXTENDING A TIME INTERVAL DURING WHICH UPSCALING IS PERFORMED ON THE BASIS OF A HORIZONTAL SYNCHRONIZATION SIGNAL

EP3843079B1EP 3843079 B1EP3843079 B1EP 3843079B1EP-3843079-B1

Inventors

  • BAE, JONGKON
  • KIM, HOJIN
  • LEE, YOHAN
  • HONG, YUNPYO
  • Kim, Donghui
  • SEO, Eunsook
  • HAN, DONGKYOON

Dates

Publication Date
20260506
Application Date
20190919

Claims (14)

  1. An electronic device (300), comprising: a display panel (330); a processor (310) configured to generate an image to be displayed through the display panel, wherein the processor is configured to split the image to be displayed into a plurality of partial images, said processor being further configured to transmit information on each of the plurality of partial images based on a horizontal synchronization signal; and a Display Driving Integrated Circuit (DDIC) (320) operatively coupled to the display panel and to the processor, said DDIC comprising an up-scaler (326) for up-scaling configured to up-scale each of the plurality of partial images, and a timing controller (324) configured to generate a first horizontal synchronization signal that includes a first porch interval during a first time period, and to generate a second horizontal synchronization signal that includes a second porch interval during a second time period different from the first time period; wherein the DDIC is configured to: receive, from the processor, the information on the plurality of partial images, wherein the information on the plurality of partial images is transmitted by the processor based on the first horizontal synchronization signal, and display the image at a first resolution by using the display panel, based on the received information on the plurality of partial images; wherein the DDIC is further configured to: receive, from the processor, the information on the plurality of partial images, wherein the information on the plurality of partial images is transmitted by the processor based on the second horizontal synchronization signal; obtain second data by up-scaling with the up-scaler the information on the plurality of partial images; and display the image at a second resolution higher than the first resolution by using the display panel, based on the obtained second data; wherein a length of the second porch interval is longer than a length of the first porch interval such that the length of the second porch interval secures time for performing said up-scaling.
  2. The electronic device of claim 1, wherein the timing controller is configured to determine the length of the second porch interval according to a ratio of the first resolution to the second resolution.
  3. The electronic device of claim 1, wherein the timing controller is configured to determine the length of the second porch interval according to a length of time required for said up-scaling.
  4. The electronic device of claim 1, wherein the timing controller is configured to determine the length of the second porch interval to be longer than a length of a time interval requested by the processor to transmit information on a partial image among the plurality of partial images.
  5. The electronic device of claim 1, 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.
  6. The electronic device of claim 5, wherein the DDIC is configured to obtain the second data further based on third data received based on the second horizontal synchronization signal from the processor to display the image at the first resolution in another line below the line among the plurality of horizontal lines.
  7. The electronic device of claim 1, wherein the DDIC is further configured to generate a virtual horizontal synchronization signal configured to perform said up-scaling every period shorter than a period of the second horizontal synchronization signal.
  8. The electronic device of claim 7, wherein the virtual horizontal synchronization signal is generated within a time interval corresponding to the second porch interval.
  9. The electronic device of claim 1, wherein the DDIC does not include an internal memory which records the first data received from the processor.
  10. 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 information on each of the plurality of partial images, based on a video mode of the MIPI.
  11. The electronic device of claim 1, wherein the second 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.
  12. The electronic device of claim 1, wherein the DDIC is further configured to: receive a signal for indicating that the first resolution is changed to the second resolution from the processor, during a time at which the image is displayed at the first resolution, based on the horizontal synchronization signal including the first porch interval; change the length of the first porch interval to the length of the second porch interval, in response to the reception; and display the image at the second resolution through the display panel, based on the second horizontal synchronization signal.
  13. The electronic device of claim 1, wherein the second data is obtained before another horizontal synchronization signal subsequent to the horizontal synchronization signal is generated.
  14. The electronic device of claim 7, wherein a period for generating the virtual horizontal synchronization signal is identified based on a relative ratio of the first resolution and the second resolution.

Description

Technical Field Various embodiments described below relate to an electronic device for extending a time interval during which upscaling is performed based on a horizontal synchronization signal to convert a resolution of a screen displayed through a display panel, and a method thereof. Background Art An electronic device such as a smartphone, a tablet Personal Computer (PC), a smart watch, or the like may display a variety of content such as an image, a text, or the like. The display panel may be driven through a Display Driver Integrated Circuit (DDIC). The DDIC may display the content by using the display panel according to a specified timing signal, through a plurality of pixels constituting the display panel. Reference is made here to US 2014/0063069 A1, wherein, during downscaling of an image, a scaler may generate a specified number 'M' output lines of an output frame for each specified number 'N' input lines of an input frame, and store the output lines in a buffer. The scaler may keep the output horizontal line durations consistent throughout the active line period, with a horizontal line duration ratio of M/N between input and output frame streams. 'M' threshold values may be stored in a lookup table, and for each output line the relative position of the output line within the output frame may be used to look up a corresponding threshold value in the lookup table, and the timing generator may wait until the buffer occupancy reaches the corresponding threshold value before outputting the output line from the buffer. To guarantee even line widths, the threshold values may be assigned values that depend on the scaling ratio used. Disclosure of Invention Technical Problem A processor included in an electronic device may transmit data to a Display Driver Integrated Circuit (DDIC) included in the electronic device to display an image at a first resolution through a display panel included in the electronic device, based on a horizontal synchronization signal. The DDIC may up-scale the data to display the image at a second resolution higher than the first resolution through the display panel. Therefore, the electronic device may require a solution for extending a time interval for the up-scaling of the data. Technical problems to be solved in the disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned herein can be clearly understood by those skilled in the art to which the disclosure pertains from the following descriptions. FIG. 7 illustrates an example of up-scaling performed in an electronic device according to various embodiments;FIG. 8 illustrates an example of an operation of an electronic device for obtaining up-scaled data according to various embodiments; andFIG. 9 illustrates another example of an operation of an electronic device according to various embodiments. Best Mode for Carrying out the Invention Fig. 1 is a block diagram illustrating an electronic device 101 in a network environment 100 according to various embodiments. Referring to Fig. 1, the electronic device 101 in the network environment 100 may communicate with an electronic device 102 via a first network 198 (e.g., a short-range wireless communication network), or an electronic device 104 or a server 108 via a second network 199 (e.g., a long-range wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 via the server 108. According to an embodiment, the electronic device 101 may include a processor 120, memory 130, an input device 150, a sound output device 155, a display device 160, an audio module 170, a sensor module 176, an interface 177, a haptic module 179, a camera module 180, a power management module 188, a battery 189, a communication module 190, a subscriber identification module(SIM) 196, or an antenna module 197. In some embodiments, at least one (e.g., the display device 160 or the camera module 180) of the components may be omitted from the electronic device 101, or one or more other components may be added in the electronic device 101. In some embodiments, some of the components may be implemented as single integrated circuitry. For example, the sensor module 176 (e.g., a fingerprint sensor, an iris sensor, or an illuminance sensor) may be implemented as embedded in the display device 160 (e.g., a display). The processor 120 may execute, for example, software (e.g., a program 140) to control at least one other component (e.g., a hardware or software component) of the electronic device 101 coupled with the processor 120, and may perform various data processing or computation. According to one embodiment, as at least part of the data processing or computation, the processor 120 may load a command or data received from another component (e.g., the sensor module 176 or the communication module 190) in volatile memory 132, process the command or the data stored in the volatile memory 1