Display device, driving method thereof, and non-transitory computer readable recording medium

• US 10,460,650 B2
• Filed: 08/09/2017
• Issued: 10/29/2019
• Est. Priority Date: 12/01/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Hyeon, Byeong-cheol
• Primary Examiner(s): Eurice, Michael J
• Application Number:
  US15/672,453
• Publication Number:
  US 20180158399A1
• Time in Patent Office: 811 Days
• CPC Class Codes: G09G 2310/0213 controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
• CPC Class Codes: G09G 2310/0216 Interleaved control phases for different scan lines in the same sub-field, e.g. initialization, addressing and sustaining in plasma displays that are not simultaneous for all scan lines
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/16 Determination of a pixel data signal depending on the signal applied in the previous frame
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

A display device includes a display including a plurality of LED lines, a scan driver for successively supplying a power to the plurality of LED lines, and a processor for controlling the scan driver to successively supply the power to the plurality of LED lines in a repeated manner for each of a plurality of sub-periods that form a scan period and changing a turn-on order of the plurality of LED lines for each of the plurality of sub-periods.

Claims

1. A display device for displaying an image frame during a scan period, the display device comprising:

a display comprising a plurality of light-emitting diode (LED) lines;

a scan driver; and

a processor configured to;

based on the image frame being received, control the scan driver to supply a power to the plurality of LED lines during a first sub-period among a plurality of sub-periods into which the scan period is divided, and

control the scan driver to firstly supply, during a second sub-period among the plurality of sub-periods, the power to a LED line that is different than a LED line to which the power is firstly supplied during the first sub-period or a LED line to which the power is lastly supplied during the first sub-period, from among the plurality of LED lines,

wherein the second sub-period is next to the first sub-period among the plurality of sub-periods.

2. The display device as claimed in claim 1, wherein the processor is further configured to:

determine a random power supply order for which the power is supplied to remaining except for the LED line to which the power is firstly supplied during the second sub-period, and

control the scan driver to supply the power to the remaining according to the random power supply order during the second sub-period.

3. The display device as claimed in claim 1, wherein the LED line to which the power is firstly supplied during the second sub-period is apart for a predetermined number of lines from the LED line to which the power is firstly supplied during the first sub-period, from among the plurality of LED lines.

4. The display device as claimed in claim 1, wherein the LED line to which the power is firstly supplied during the second sub-period is included in a region from among two regions, into which the plurality of LED lines are divided, that is different from the other region comprising the LED line to which the power is firstly supplied during the first sub-period.

5. The display device as claimed in claim 1, wherein the processor is further configured to change a number of the plurality of sub-periods based on grayscale values of the image frame.

6. The display device as claimed in claim 1, the display device further comprising a driving integrated circuit (IC) for LED light emission,

wherein the processor is further configured to:

rearrange an order of video data to correspond to a turn-on order for which the power is supplied to the plurality of LED lines during each of the plurality of sub-periods, and

transmit the rearranged order of video data to the driving IC.

7. The display device as claimed in claim 6, wherein the driving IC comprises an internal memory configured to store the video data therein, and

the processor is further configured to:

rearrange the order of the video data based on the turn-on order and a type of the internal memory of the driving IC, and

transmit the rearranged video data to the driving IC.

8. A method for displaying an image frame during a scan period by driving a display device comprising a plurality of light-emitting diode (LED) lines, the method comprising:

based on the image frame being received, supplying a power to the plurality of LED lines during a first sub-period among a plurality of sub-periods into which the scan period is divided;

and

firstly supplying, during a second sub-period among the plurality of sub-periods, the power to a LED line that is different than a LED line to which the power is firstly supplied in the first sub-period or a LED line to which the power is lastly supplied in the first sub-period, from among the plurality of LED lines,

wherein the second sub-period is next to the first sub-period among the plurality of sub-periods.

9. The method as claimed in claim 8, the method further comprising:

determining a random power supply order for which the power is supplied to remaining except for the LED line to which the power is firstly supplied during the second sub-period; and

supplying the power to the remaining according to the random power supply order during the second sub-period.

10. The method as claimed in claim 8, wherein the LED line to which the power is firstly supplied during the second sub-period is apart for a predetermined number of lines from the LED line to which the power is firstly supplied during the first sub-period, from among the plurality of LED lines.

11. The method as claimed in claim 8, wherein the LED line to which the power is firstly supplied during the second sub-period is included in a region from among two regions, into which the plurality of LEI) lines are divided, that is different from the other region comprising the LED line to which the power is firstly supplied during the first sub-period.

12. The method as claimed in claim 8, the method further comprising rearranging an order of video data to correspond to a turn-on order for which the power is supplied to the plurality of LED lines during each of the plurality of sub-periods.

13. A non-transitory computer readable recording medium comprising a program for executing a method for displaying an image frame during a scan period by driving a display device comprising a plurality of light-emitting diode (LED) lines, the method comprising:

based on the image frame being received, supplying a power to the plurality of LED lines during a first sub-period among a plurality of sub-periods into which the scan period is divided;

and

firstly supplying, during a second sub-period among the plurality of sub-periods, the power to a LED line that is different than a LED line to which the power is firstly supplied in the first sub-period or a LED line to which the power is lastly supplied in the first sub-period, from among the plurality of LED lines.