Organic light emitting diode display device and method for operating the same

1. An organic light emitting diode (OLED) display device comprising:

a communication unit configured to connect with a terminal;

a display unit including pixels constituted by OLEDs; and

a controller configured to:

receive mirroring image data, which corresponds to a screen displayed on the terminal, through the communication unit,

control the display unit to display a mirroring image on an area of the display unit based on the received mirroring image data, and

control the display unit not to display the displayed mirroring image on the area based on an average picture level (APL) of the displayed mirroring image.

2. The OLED display device of claim 1 , wherein the controller is configured to:

acquire an APL of a frame of the mirroring image from the mirroring image data,

calculate an APL variation by comparing the acquired APL with a previously-acquired APL, and

control the display unit not to display the displayed mirroring image, based on the calculated APL variation.

3. The OLED display device of claim 2 , wherein the controller is configured to:

control the display unit to maintain displaying the mirroring image when the acquired APL is less than the reference APL, and

control the display unit not to display the displayed mirroring image, based on the APL variation when the acquired APL is equal to or greater than a reference APL.

4. The OLED display device of claim 2 , wherein the controller is configured to:

acquire an APL at a predetermined frame interval of the mirroring image, and

control the display unit not to display the displayed mirroring image, when maintaining, for a threshold time, a state that the APL variation between the acquired APL and the previously-acquired APL is less than a reference variation.

5. The OLED display device of claim 4 , wherein the controller is configured to:

display a broadcast image, which is received from a broadcast reception unit, on the display unit,

display the mirroring image by overlaying the mirroring image with the area of the broadcast image, and

display an overlaid portion of the broadcast image on the area, by controlling the display unit not to display the mirroring image displayed on the area.

6. The OLED display device of claim 5 , wherein the controller is configured to:

adjust a transparency of the mirroring image, based on a time for maintaining the state that the APL variation is less than the reference variation.

7. The OLED display device of claim 4 , wherein the controller is configured to:

display a broadcast image, which is received from a broadcast reception unit, on a first region of the display unit,

display the mirroring image on the area which is not overlapped with the first region of the display unit, and

increase a size of the first region and reduces a size of the area as a time for maintaining the state that the APL variation is less than the reference variation is increased.

8. The OLED display device of claim 4 , wherein the controller is configured to:

display a broadcast image, which is received from a broadcast reception unit, on a first region of the display unit;

display the mirroring image on the area which is not overlapped with the first region of the display unit, and

display a screen protection image on the area, when the controller controls the display unit not to display the mirroring image on the area.

9. The OLED display device of claim 2 , wherein the controller is configured to:

periodically acquire an APL of the mirroring image,

increase a count when an APL variation between the acquired APL and the previously-acquired APL is less than a reference variation, and

control the display unit not to display the displayed mirroring image, when the count arrives at a threshold count or exceeds the threshold count.

10. The OLED display device of claim 1 , wherein the controller is configured to:

when controlling the display unit not to display the displayed mirroring image,

acquire an APL of the mirroring image at a predetermined frame interval based on the mirroring image data received from the terminal, and

control the display to display the mirroring image on the area, based on an APL variation between the acquired APL and the previously-acquired APL.

11. The OLED display device of claim 1 , wherein the controller is further configured to:

when controlling the display unit not to display the displayed mirroring image,

control the display unit to display the mirroring image, in response to a wake-up signal received from the terminal as a state of the terminal is changed.

12. The OLED display device of claim 1 , wherein the controller is further configured to:

display a mirroring menu on the display unit, and

after controlling the display unit not to display the displayed mirroring image, control the display unit to display the mirroring image in response to a selection input of the mirroring menu.

13. A method for operating an OLED display device, the method comprises:

receiving mirroring image data, which corresponds to a screen displayed on a terminal connected with the OLED display device, from the terminal;

controlling the display unit to display a mirroring image on an area of the display unit based on the received mirroring image data; and

controlling the display unit not to display the displayed mirroring image, based on an APL of the mirroring image.

14. The method of claim 13 , wherein the controlling the display unit not to display the displayed mirroring image includes:

acquiring an APL of a frame of the mirroring image from the mirroring image data;

calculating an APL variation by comparing the acquired APL with a previously-acquired APL; and

controlling the display unit not to display the displayed mirroring image, based on the calculated APL variation.

15. The method of claim 14 , wherein the controlling the display unit not to display the displayed mirroring image, based on the calculated APL variation includes:

controlling the display unit not to display the displayed mirroring image, based on the APL variation when the acquired APL is equal to or greater than a reference APL; and

controlling the display unit to maintain displaying the mirroring image when the acquired APL is less than the reference APL.

16. The method of claim 14 , wherein the acquiring of the APL of the frame of the mirroring image includes:

acquiring an APL at a predetermined frame interval of the mirroring image, and

wherein the controlling the display unit not to display the displayed mirroring image, based on the calculated APL variation includes:

controlling the display unit not to display the displayed mirroring image, when maintaining, for a threshold time, a state that the APL variation is less than a reference variation.

17. The method of claim 16 , wherein controlling the display unit to display the mirroring image on the area includes:

displaying a broadcast image, which is received from a broadcast reception unit, on the display unit; and

displaying the mirroring image by overlaying the mirroring image with the area of the broadcast image, and

wherein the controlling the display unit not to display the displayed mirroring image includes:

displaying an overlaid portion of the broadcast image on the area.

18. The method of claim 13 , wherein the controlling the display unit not to display the displayed mirroring image further includes:

acquiring an APL of the mirroring image at a predetermined frame interval based on the mirroring image data received from the terminal; and

controlling the display unit to display the mirroring image, when an APL variation between the acquired APL and the previously-acquired APL is equal to or greater than a reference variation.

19. The method of claim 13 , wherein the controlling the display unit not to display the displayed mirroring image further includes:

controlling the display unit to display the mirroring image, in response to a wake-up signal received from the terminal as a state of the terminal is changed.

20. The method of claim 13 , wherein the controlling the display unit to display the mirroring image further includes:

displaying a mirroring menu on the display unit, and

wherein the controlling the display unit not to display the displayed mirroring image further includes:

controlling the display unit to display the mirroring image in response to a selection input of the mirroring menu.