Electronic device and control method thereof

1. An electronic device comprising:

an input unit; and

a processor configured to:

acquire a current duty of a plurality of first dimming blocks, respectively, for driving a backlight unit, based on pixel information of an image input through the input unit;

identify a second dimming block including a first dimming block among the plurality of first dimming blocks in the image, based on the pixel information of the image;

acquire a current value of the second dimming block based on a current duty of the first dimming block included in the second dimming block; and

acquire a driving signal for driving the backlight unit, based on the current duty of the plurality of first dimming blocks, respectively, and the current value of the second dimming block.

2. The electronic device as claimed in claim 1 , wherein the processor is further configured to variably identify at least one of a size or a shape of the second dimming block based on the pixel information of the image.

3. The electronic device as claimed in claim 1 , wherein the processor is further configured to acquire the current value of the second dimming block based on at least one of an average duty value, a maximum duty value, a minimum duty value, or an intermediate duty value of the first dimming block included in the second dimming block.

4. The electronic device as claimed in claim 3 , wherein the processor is further configured to acquire a current duty corresponding to the second dimming block by applying a predetermined weight to the at least one of the maximum duty value, the minimum duty value, or the intermediate duty value of the first dimming block included in the second dimming block, and acquire the current value of the second dimming block based on the acquired current duty.

5. The electronic device as claimed in claim 1 , further comprising a storage unit configured to store information about a current value corresponding to the current duty of the plurality of first dimming blocks, respectively,

wherein the processor is further configured to acquire the current value corresponding to the current duty of the first dimming block included in the second dimming block, and acquire the current value of the second dimming block based on the acquired current value.

6. The electronic device as claimed in claim 1 , wherein the processor is further configured to acquire a gain value according to the current duty of the first dimming block included in the second dimming block, and acquire the current value of the second dimming block by applying the gain value to a predetermined current value.

7. The electronic device as claimed in claim 1 , wherein the processor is further configured to identify the image as a plurality of areas according to grayscale, and identify at least one second dimming block within each area.

8. The electronic device as claimed in claim 1 , wherein the processor is further configured to, based on a black area larger than a predetermined size being included in the image, identify the second dimming block in a remaining area other than the black area.

9. The electronic device as claimed in claim 1 , wherein the processor is further configured to, based on a logo area being included in the image, identify the logo area as the second dimming block.

10. The electronic device as claimed in claim 1 , further comprising:

a display panel; and

the backlight unit,

wherein the processor is further configured to drive the backlight unit based on the acquired driving signal.

11. A control method of an electronic device, the control method comprising:

acquiring a current duty of a plurality of first dimming blocks, respectively, for driving a backlight unit based on pixel information of an input image;

identifying a second dimming block including a first dimming block among the plurality of first dimming blocks in the input image based on the pixel information of the input image;

acquiring a current value of the second dimming block based on the current duty of the first dimming block included in the second dimming block; and

acquiring a driving signal for driving the backlight unit based on the current duty of the plurality of first dimming blocks, respectively, and the current value of the second dimming block.

12. The control method as claimed in claim 11 , wherein the identifying the second dimming block further comprises:

variably identifying at least one of a size or a shape of the second dimming block based on the pixel information of the input image.

13. The control method as claimed in claim 11 , wherein the acquiring the current value of the second dimming block further comprises:

acquiring the current value of the second dimming block based on at least one of an average duty value, a maximum duty value, a minimum duty value, or an intermediate duty value of the first dimming block included in the second dimming block.

14. The control method as claimed in claim 13 , wherein the acquiring the current value of the second dimming block further comprises:

acquiring the current duty corresponding to the second dimming block by applying a predetermined weight to the at least one of the maximum duty value, the minimum duty value, or the intermediate duty value of the first dimming block included in the second dimming block, and

acquiring the current value of the second dimming block based on the acquired current duty.

15. The control method as claimed in claim 11 , wherein the acquiring the current value of the second dimming block further comprises:

acquiring the current value corresponding to the current duty of the first dimming block included in the second dimming block, and

acquiring the current value of the second dimming block based on the acquired current value.