DISPLAY APPARATUS AND METHOD FOR DECREASING MOTION BLUR THEREOF

• US 20110279467A1
• Filed: 05/12/2011
• Published: 11/17/2011
• Est. Priority Date: 05/12/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Jung-jin, YUN, Sang-un, CHOI, Nak-won, KIM, Hyung-rae
• Application Number:
  US13/106,238
• Publication Number:
  US 20110279467A1
• Time in Patent Office: Days
• US Class Current: 345/581
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 2320/0606 Manual adjustment
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A display apparatus includes a backlight part comprising a light source group; a motion analyzer for dividing a screen of the liquid crystal display panel into a plurality of regions and analyzing a motion level in each region; and a backlight controller for controlling driving of the light source group during a unit of time until image characteristics reach a maximum response point, in at least one region selected from the plurality of the regions based on the analyzed motion level. Hence, the motion blur can be decreased.

Claims

1. A display apparatus comprising:

a backlight part comprising at least one light source group;

a motion analyzer which divides a screen of a liquid crystal display panel into a plurality of regions and which analyzes a motion level of each region; and

a backlight controller which controls driving of the light source group during a unit of time until image characteristics reach a maximum response point, in at least one region selected from the plurality of regions based on the analyzed motion level.

2. The display apparatus of claim 1, wherein the light source group comprises a plurality of Light Emitting Device (LED) light sources.

3. The display apparatus of claim 1, wherein the motion analyzer classifies the plurality of the regions into a still image without motion and a video frame with motion, classifies the plurality of the regions into an image with motion level over a threshold and an image with the motion level below the threshold, or extracts a region of an image having highest motion level from the plurality of regions.

4. The display apparatus of claim 1, wherein the light source group comprises first, second, third, and fourth light source groups,

wherein the first light source group is disposed in a row direction in a top edge region of the backlight part, the second light source group is disposed in the row direction in a bottom edge region of the backlight part, the third light source group is disposed in the row direction in the top edge region and the bottom edge region of the backlight part respectively, and the fourth light source group is disposed in the row direction in the top edge region and the bottom edge region of the backlight part respectively and in a column direction in part of left and right edge regions.

5. The display apparatus of claim 4, wherein the backlight part comprises a single light source group driven together, and

the backlight part drives the single light source group during a unit of time until image characteristics in a region of a maximum motion level reach a maximum response point.

6. The display apparatus of claim 5, wherein the single light source group comprises the first, second, third, and fourth light source groups.

7. The display apparatus of claim 4, wherein the backlight part comprises two light source groups independently driven, and

the backlight part drives the light source group which is close to a confirmed region, from the two light source groups, during a unit of time until image characteristics in the region of a confirmed maximum motion level reach a maximum response point.

8. The display apparatus of claim 4, wherein the backlight part comprises two light source groups independently driven, and

when the plurality of the regions have a maximum motion level, the backlight part drives the light source group which is close to any one of the plurality of regions, from the two light source groups, during a unit of time until image characteristics in one of the plurality of regions reach a maximum response point.

9. The display apparatus of claim 7, wherein the two light source groups comprise the third light source group and the fourth source group.

10. The display apparatus of claim 4, wherein the backlight part comprises three light source groups independently driven, and

the backlight part drives the light source group which is close to a confirmed region, from the three light source groups, during a unit of time until image characteristics in a region of a confirmed maximum motion level reach a maximum response point.

11. The display apparatus of claim 4, wherein the backlight part comprises three light source groups independently driven, and

when a plurality of regions have a maximum motion level, the backlight part drives the light source group which is close to any one of the plurality of regions with the maximum motion level, from the three light source groups, during a unit of time until image characteristics in one of the plurality of regions with the maximum motion level reach a maximum response point.

12. The display apparatus of claim 10, wherein the three light source groups comprise the fourth source group.

13. The display apparatus of claim 1, wherein the backlight controller repeatedly drives the light source groups per unit of time until image characteristics in at least one of the regions reach a maximum response point.

14. The display apparatus of claim 1, wherein the maximum response point is calculated in advance based on a timing of the input image signal, a delay of the input image signal, a delay of a driver for driving the liquid crystal display panel, and a response speed of the liquid crystal display panel.

24. The display apparatus of claim 8, wherein the two light source groups comprise the third light source group and the fourth light source group.

25. The display apparatus of claim 11, wherein the three light source groups comprise the fourth light source group.

15. A method of decreasing motion blur of a display apparatus, comprising:

dividing a screen of a liquid crystal display panel into a plurality of regions and analyzing a motion level in each of the plurality of regions; and

driving a light source group of a backlight part during a unit of time until image characteristics in at least one of the plurality of regions reach a maximum response point, based on the analyzed motion level.

16. The method of claim 15, wherein the light source group comprises a plurality of Light Emitting Device (LED) light sources arranged in edge regions of the backlight part.

17. The method of claim 15, wherein the light source group comprises first, second, third, and fourth light source groups,

wherein the first light source group is disposed in a row direction in a top edge region of the backlight part, the second light source group is disposed in the row direction in a bottom edge region of the backlight part, the third light source group is disposed in the row direction in the top edge region and the bottom edge region of the backlight part respectively, and the fourth light source group is disposed in the row direction in the top edge region and the bottom edge region of the backlight part respectively and in a column direction in part of left and right edge regions.

18. The method of claim 17, wherein the driving comprises driving together light sources in a single light source group of the liquid crystal display panel, during a unit of time until image characteristics in a region of a maximum motion level reach a maximum response point.

19. The method of claim 17, wherein the driving comprises independently driving the light source group which is close to a confirmed region, from two light source groups in the liquid crystal display panel, during a unit of time until image characteristics in the confirmed region with a maximum motion level reach a maximum response point.

20. The method of claim 17, wherein, when the plurality of the regions have a maximum motion level, the driving comprises independently driving the light source group which is close to any one of the plurality of the regions, from two light source groups in the liquid crystal display panel, during a unit of time until image characteristics in one of the regions reach a maximum response point.

21. The method of claim 17, wherein the driving comprises independently driving the light source group which is close to a confirmed region, from three light source groups in the liquid crystal display panel, during a unit of time until image characteristics in the confirmed region with a maximum motion level reach a maximum response point.

22. The method of claim 17, wherein, when the plurality of the regions has a maximum motion level, the driving comprises independently driving the light source group which is close to any one of the plurality of the regions, from three light source groups in the liquid crystal display panel, during a unit of time until image characteristics in one of the plurality of the regions reach a maximum response point.

23. The method of claim 15, wherein the driving comprises repeatedly driving the light source groups per unit of time until image characteristics in at least one of the regions reach a maximum response point.

26. A method of driving a light source group, the method comprising:

dividing a screen of a liquid crystal display panel into a plurality of regions;

determining at least one region from the plurality of regions with a highest motion level; and

driving the light source group of a backlight part based on the determining.

27. The method of claim 26, wherein the driving comprises driving the light source group of a backlight part until image characteristics in the at least one region with a highest motion level reaches a maximum response point.

28. The method of claim 26, wherein the light source group is driven together and comprises a first light source subgroup positioned in a horizontal row direction in a top edge region of the backlight part and a second light source subgroup positioned in a horizontal direction in a bottom edge region of the backlight part.

29. The method of claim 28, wherein the light source group further comprises a third light source subgroup positioned in a vertical column direction in a left edge region and a right edge region of the backlight part.

30. The method of claim 29, wherein the first, second, and third light source subgroups are driven together as a single light source group.

31. The method of claim 29, wherein the first and second light source subgroups are driven independently from the third light source subgroup such that the light source subgroup closest to a region with a highest motion level is driven until characteristics in the region with the highest motion level reach a maximum response point.