Display Device For Low Speed Drive And Method For Driving The Same

• US 20140320478A1
• Filed: 04/28/2014
• Published: 10/30/2014
• Est. Priority Date: 04/30/2013
• Status: Abandoned Application

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: OH, Daeseok, SEO, Bogun, PARK, Yonghwa
• Application Number:
  US14/263,720
• Publication Number:
  US 20140320478A1
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G09G 2310/0218 with collection of electrodes in groups for n-dimensional addressing
• CPC Class Codes: G09G 2310/04 Partial updating of the display 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 3/2025 the sub-frames having all the same time duration
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general

Abstract

A display device for low speed drive includes a display panel formed with gate lines and data lines intersecting the gate lines, wherein a pixel is defined by each crossing of the gate lines and the data lines, a source driver supplying a data voltage to the data lines, a gate driver supplying a gate pulse to the gate lines, and a timing controller which time-divides one frame of received data into n sub-frames, where n is a positive integer equal to or greater than 4, groups the gate lines into n gate groups, controls the gate driver to scan the n gate groups in scan sub-frames corresponding to a portion of the n sub-frames, and control the scan order of the n gate groups in a zigzag form.

Claims

1. A display device for low speed drive comprising:

a display panel formed with a plurality of gate lines and a plurality of data lines intersecting with the plurality of gate lines, wherein a pixel is defined by each crossing of the gate lines and the data lines;

a source driver configured to supply data voltages to the data lines;

a gate driver configured to supply a gate pulse to the gate lines; and

a timing controller configured to time-divide each frame of received data into n sub-frames, where n is a positive integer equal to or greater than 4, group the gate lines into n gate groups, control the gate driver to scan the n gate groups in scan sub-frames corresponding to a portion of the n sub-frames, and control a scan order of the n gate groups to scan the n gate groups in a zigzag form.

2. The display device of claim 1, wherein the gate lines are grouped into the n gate groups based on position within a block of n adjacent gate lines, the block of n adjacent gate lines comprising one or more sub-blocks of gate lines wherein one gate line is scanned in each sub-block in each of the scan sub-frames, and wherein the timing controller is further configured to control the scan order of the n gate groups in the zigzag form such that within each sub-block, a line position corresponding to a gate line being scanned alternately increases and decreases between consecutive scan sub-frames.

3. The display device of claim 1, wherein the timing controller controls the gate driver to scan the gate lines according to the scan order such that gate lines scanned in any given scan sub-frame are non-adjacent.

4. The display device of claim 1, wherein the timing controller is further configured to control the gate drive to skip a scan operation of all of the gate groups in skip sub-frames corresponding to remaining sub-frames excluding the scan sub-frames from the n sub-frames,

wherein at least one of the skip sub-frames is disposed between every adjacent scan sub-frames.

5. The display device of claim 1, wherein at least two gate groups are scanned in each of the scan sub-frames.

6. The display device of claim 1, wherein the n sub-frames include first, third, fifth, and seventh sub-frames corresponding to the scan sub-frames and second, fourth, sixth, and eighth sub-frames corresponding to skip sub-frames and the gate lines are grouped into first to eighth gate groups, and wherein the timing controller is further configured to control the gate driver to scan the second and sixth gate groups in the first sub-frame, to scan the third and seventh gate groups in the third sub-frame, to scan the first and fifth gate groups in the fifth sub-frame, and to scan the fourth and eighth gate groups in the seventh sub-frame.

7. The display device of claim 1, wherein the n sub-frames include first, third, fifth, and seventh sub-frames corresponding to the scan sub-frames and second, fourth, sixth, and eighth sub-frames corresponding to skip sub-frames and the gate lines are grouped into first to eighth gate groups, and wherein the timing controller is configured to control the gate driver to scan the third and seventh gate groups in the first sub-frame, to scan the second and sixth gate groups in the third sub-frame, to scan the fourth and eighth gate groups in the fifth sub-frame, and to scan the first and fifth gate groups in the seventh sub-frame.

8. The display device of claim 1, wherein the source driver is configured to supply the data voltages to the data lines during the scan frames and not supply the data voltages to the data lines in skip sub-frames corresponding to sub-frames other than the n scan sub-frames.

10. The method of claim 1, wherein grouping the gate lines into n gate groups comprises grouping the gate lines based on position within a block of n adjacent gate lines, the block of n adjacent gate lines comprising one or more sub-blocks of gate lines wherein one gate line is scanned in each sub-block in each of the scan sub-frames, and wherein controlling the scan order of the n gate groups in the zigzag form comprises using a scan order such that such that within each sub-block, a line position corresponding to a gate line being scanned alternately increases and decreases between consecutive scan sub-frames.

11. The display device of claim 1, wherein controlling the scan order comprises scanning such that gate lines scanned in any given scan sub-frame are non-adjacent.

16. The method of claim 8, further comprising:

controlling an operation of the source driver in the skip sub-frames to supply the data voltages during the scan frames and to not the data voltages to the data lines during the skip frames corresponding to sub-frames other than the n scan sub-frames.

9. A method for driving a display device for low speed drive including a display panel formed with a plurality of gate lines and a plurality of data lines intersecting with the plurality of gate lines, wherein a pixel is defined by each crossing of the gate lines and the data lines, a source driver supplying data voltages to the data lines, and a gate driver supplying a gate pulse to the gate lines, the method comprising:

time-dividing each frame of received data into n sub-frames, where n is a positive integer equal to or greater than 4;

grouping the gate lines into n gate groups; and

controlling the gate driver to scan the n gate groups in scan sub-frames corresponding to a portion of the n sub-frames and controlling the scan order of the n gate groups to scan the n gate groups in a zigzag form.

12. The method of claim 9, further in comprising:

skipping a scan operation of the gate lines in skip sub-frames corresponding to remaining sub-frames excluding the scan sub-frames from the n sub-frames,

wherein at least one of the skip sub-frames is disposed between every adjacent scan sub-frames.

13. The method of claim 9, wherein controlling the gate driver to dividedly scan the n gate groups in scan sub-frames comprising:

scanning at least two gate groups in each of the scan sub-frames.

14. The method of claim 9, wherein when the n sub-frames include first, third, fifth, and seventh sub-frames corresponding to the scan sub-frames and second, fourth, sixth, and eighth sub-frames corresponding to skip sub-frames and the gate lines are grouped into first to eighth gate groups, and wherein controlling the scan order of the n gate groups in the zigzag form includes:

scanning the second and sixth gate groups in the first sub-frame;

scanning the third and seventh gate groups in the third sub-frame;

scanning the first and fifth gate groups in the fifth sub-frame; and

scanning the fourth and eighth gate groups in the seventh sub-frame.

15. The method of claim 9, wherein when the n sub-frames include first, third, fifth, and seventh sub-frames corresponding to the scan sub-frames and second, fourth, sixth, and eighth sub-frames corresponding to skip sub-frames and the gate lines are grouped into first to eighth gate groups, wherein controlling the scan order of the n gate groups in the zigzag form includes:

scanning the third and seventh gate groups in the first sub-frame;

scanning the second and sixth gate groups in the third sub-frame;

scanning the fourth and eighth gate groups in the fifth sub-frame; and

scanning the first and fifth gate groups in the seventh sub-frame.

17. A display device for low speed drive comprising:

a display panel formed with a plurality of gate lines and a plurality of data lines intersecting the plurality of gate lines, wherein a pixel is defined by each crossing of the gate lines and the data lines;

a gate driver configured to supply a gate pulse to the gate lines;

a timing controller configured to receive data arranged in a sequence of frames, to time-divide a frame from the sequence of frames into a sequence of n sub-frames, wherein the n sub-frames includes a sequence of scan sub-frames interleaved with a sequence of skip sub-frames, to group the gate lines into n gate groups based on position within a block of n adjacent gate lines, the block of n adjacent gate lines comprising one or more sub-blocks of gate lines wherein the timing controller controls the gate drive to scan one gate line in each sub-block in each of the scan sub-frames, and to control the gate driver to scan the gate lines according to a scan order such that such that within each sub-block, a line position corresponding to a gate line being scanned alternately increases and decreases between consecutive scan sub-frames.

18. The display device of claim 17, wherein the gate driver does not supply the gate pulses or perform a scan operation during the skip sub-frames.

19. The display device of claim 17, further comprising:

a source driver configured to supply data voltages to the data lines during the scan sub-frames and not supply the data voltages to the data lines during the skip sub-frames.

20. The display device of claim 17, wherein the timing controller controls the gate driver to scan the gate lines according to the scan order such that gate lines scanned in any given scan sub-frame are non-adjacent.