DISPLAY DEVICE, DRIVING METHOD THEREOF, AND NON-TRANSITORY COMPUTER READABLE RECORDING MEDIUM

• US 20180158399A1
• Filed: 08/09/2017
• Published: 06/07/2018
• Est. Priority Date: 12/01/2016
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: HYEON, Byeong-cheol
• Granted Patent: US 10,460,650 B2
• Time in Patent Office: 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 comprising:

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

a scan driver configured to successively supply a power to the plurality of LED lines; and

a processor configured to;

control 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

change a turn-on order of the plurality of LED lines for each of the plurality of sub-periods.

2. The display device as claimed in claim 1, wherein the processor is further configured to change the turn-on order of the plurality of LED lines to first supply the power to the LED line that is different than one of the plurality of LED lines to which the power was first supplied in a previous sub-period.

3. The display device as claimed in claim 2, wherein the processor is further configured to change the turn-on order of the plurality of LED lines to first supply the power to the LED line that is different than one of the plurality of LED lines to which the power was last supplied in the previous sub-period.

4. The display device as claimed in claim 2, wherein the processor is further configured to determine a random power supply order of the LED lines remaining excluding the LED line to which the power is first supplied in the changed turn-on order.

5. The display device as claimed in claim 1, wherein the processor is further configured to change the turn-on order of the plurality of LED lines to first supply the power to the LED line that is apart for a predetermined number of lines from one of the plurality of LED lines to which the power was first supplied in a previous sub-period.

6. The display device as claimed in claim 1, wherein the processor is further configured to divide the plurality of LED lines into two regions, and change the turn-on order of the plurality of LED lines to first supply the power to the LED line that belongs to a region from among the two regions that is different from the region to which the power was first supplied in a previous sub-period.

7. The display device as claimed in claim 1, 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 the changed turn-on order and transmit the rearranged order of video data to the driving IC.

8. The display device as claimed in claim 7, 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 in consideration of the changed turn-on order and a type of the internal memory of the driving IC, and transmit the rearranged video data to the driving IC.

9. The display device as claimed in claim 1, wherein the processor is further configured to change a number of the plurality of sub-periods that form the scan period in accordance with grayscale values being expressed.

10. A method for driving a display device including a plurality of light-emitting diode (LED) lines, comprising:

successively supplying a power to the plurality of LED lines in one sub-period from among a plurality of sub-periods that form a scan period;

changing a turn-on order of the plurality of LED lines so that the turn-on order becomes different from a power supply order of the one sub-period; and

successively supplying the power to the plurality of LED lines in a next sub-period from among the plurality of sub-periods in accordance with the changed turn-on order.

11. The method as claimed in claim 10, wherein the changing further comprises changing the turn-on order of the plurality of LED lines to first supply the power to the LED line that is different than one of the plurality of LED lines to which the power was first supplied in the one sub-period.

12. The method as claimed in claim 11, wherein the changing further comprises changing the turn-on order of the plurality of LED lines to first supply the power to the LED line that is different than one of the plurality of LED lines to which the power was last supplied in the one sub-period.

13. The method as claimed in claim 11, wherein the changing further comprises determining a random power supply order of the LED lines remaining excluding the LED line to which the power is first supplied in the changed turn-on order.

14. The method as claimed in claim 10, wherein the changing further comprises changing the turn-on order of the plurality of LED lines to first supply the power to the LED line that is apart for a predetermined number of lines from one of the plurality of LED lines to which the power was first supplied in the one sub-period.

15. The method as claimed in claim 10, wherein the changing comprises:

dividing the plurality of LED lines into two regions; and

changing the turn-on order of the plurality of LED lines to first supply the power to the LED line that belongs to a region from among the two regions that is different from the region to which the power was first supplied in the one sub-period.

16. The method as claimed in claim 10, further comprising rearranging an order of video data to correspond to the changed turn-on order.

17. A non-transitory computer readable recording medium comprising a program for executing a method for driving a display device comprising a plurality of light-emitting diode (LED) lines, the method comprising:

successively supplying a power to the plurality of LED lines in one sub-period from among a plurality of sub-periods that form a scan period;

changing a turn-on order of the plurality of LED lines so that the turn-on order becomes different from a power supply order of the one sub-period; and

successively supplying the power to the plurality of LED lines in a next sub-period from among the plurality of sub-periods in accordance with the changed turn-on order.