Method of driving organic light emitting diode display device in an interlaced scanning mode in which a single frame is divided
View Patent ↗A method of driving an organic light emitting diode (OLED) display device that displays grayscales in a time-division manner and can prevent the occurrence of false contours and flickers at an interface between neighboring grayscales when displaying sequential images, such as moving images, at a high speed. The method is an interlaced scanning method in which a single frame is divided into an odd-numbered field and an even-numbered field that are sequentially driven, and includes dividing each of the odd-numbered field and the even-numbered field into x sub-frame groups; dividing each of a plurality of sub-frames corresponding to bits of driving data into y divided sub-frame portions; and disposing the y divided sub-frame portions in different ones of the x sub-frame groups.
1. A method of driving an organic light emitting diode (OLED) display device in an interlaced scanning mode in which a single frame is divided into an odd-numbered field and an even-numbered field that are sequentially driven, the method comprising:
dividing each of the odd-numbered field and the even-numbered field into x sub-frame groups;
dividing each of a plurality of sub-frames corresponding to bits of driving data into y divided sub-frame portions, the sub-frame portions not being further divided;
disposing the y divided sub-frame portions in different ones of the x sub-frame groups; and
disposing a black sub-frame between two of the y divided sub-frame portions in a same one of the x sub-frame groups,
wherein:
each of x and y is a natural number, y being a single natural number;
the y divided sub-frame portions divided from a respective one of the sub-frames are respectively arranged in a same temporal order of display and at a same position in the different ones of the x sub-frame groups;
some of the plurality of sub-frames corresponding to the bits of the driving data are undivided sub-frames;
all of the undivided sub-frames are arranged in a same one of the x sub-frame groups; and
the black sub-frame is not formed from the bits of driving data and is disposed in at least one of the x sub-frame groups other than the one of the x sub-frame groups in which all of the undivided sub-frames are disposed.
2. The method of claim 1 , wherein each of x and y is a multiple of 2 or a multiple of 3, and y is smaller than x.
3. The method of claim 1 , wherein x is equal to y.
4. The method of claim 1 , wherein the y divided sub-frame portions divided from a respective one of the sub-frames have a same brightness ratio.
5. A method of driving an organic light emitting diode (OLED) display device in an interlaced scanning mode in which a single frame is divided into an odd- numbered field and an even-numbered field that are sequentially driven, the method comprising:
dividing each of the odd-numbered field and the even-numbered field into x sub-frame groups;
dividing at least two and less than all of a plurality of sub-frames corresponding to bits of driving data into y divided sub-frame portions, the sub-frame portions not being further divided;
disposing the y divided sub-frame portions in different ones of the x sub-frame groups; and
disposing a black sub-frame between two of the y divided sub-frame portions in a same one of the x sub-frame groups,
wherein:
each of x and y is a natural number, y being a single natural number;
the y divided sub-frame portions divided from a respective one of the sub-frames are respectively arranged in a same temporal order of display and at a same position in the different ones of the x sub-frame groups;
some of the plurality of sub-frames corresponding to the bits of the driving data are undivided sub-frames
all of the undivided sub-frames are arranged in a same one of the x sub-frame groups; and
the black sub-frame is not formed from the bits of driving data and is disposed in at least one of the x sub-frame groups other than the one of the x sub-frame groups in which all of the undivided sub-frames are disposed.
6. The method of claim 5 , wherein each of x and y is a multiple of 2 or a multiple of 3, and wherein y is smaller than x.
7. The method of claim 5 , wherein x is equal to y.
8. The method of claim 7 , wherein the black sub-frame is for displaying a black grayscale and has a same brightness ratio as a combination of all of the undivided sub-frames.
9. The method of claim 8 , wherein all of the undivided sub-frames and the black sub-frame are disposed at a same position in respective ones of the x sub-frame groups.
10. The method of claim 5 , wherein the sub-frames that are divided into the y sub-frame portions correspond to a predetermined number of most significant bits of the driving data.
11. The method of claim 10 , wherein the predetermined number of most significant bits is 4.