Display device and image display method of display device

1 . A display device, comprising:

a display panel configured to display an input image on a screen;

a user gaze determiner configured to determine a user gaze on the display panel based on a sensor value obtained from a motion sensor;

an area divider configured to divide the display panel into a main field-of-view area and a peripheral field-of-view area based on the determined user gaze;

a scan time determiner configured to determine a scan time of a scan signal corresponding to the main field-of-view area and a scan time of a scan signal corresponding to the peripheral field-of-view area; and

a data driver configured to apply a data voltage to the display panel according to the determined scan time,

wherein a width of a turn-on level of the scan signal corresponding to the main field-of-view area is different from a width of a turn-on level of the scan signal corresponding to the peripheral field-of-view area,

wherein in response to it is determined by the user gaze determiner that the user gaze is fixed for a threshold time or more, the scan time determiner is configured to determine scan signals to have a same scan time for the entire display panel.

2 . The display device of claim 1 , wherein in response to the user gaze is determined as an area corresponding to an upper portion of the display panel by the user gaze determiner, the area divider is configured to determine the upper portion of the display panel as the main field-of-view area as, and determine a lower portion of the display panel as the peripheral field-of-view area.

3 . The display device of claim 1 , wherein in response to the user gaze is determined as an area corresponding to a lower portion of the display panel by the user gaze determiner, the area divider is configured to determine the lower portion of the display panel as the main field-of-view area, and determine an upper portion of the display panel as the peripheral field-of-view area.

4 . The display device of claim 1 , wherein in response to the user gaze is determined as an area corresponding to a central portion of the display panel by the user gaze determiner, the area divider is configured to determine the central portion of the display panel as the main field-of-view area, and determine an upper portion and a lower portion of the display panel as the peripheral field-of-view area.

5 . The display device of claim 1 , wherein the scan time determiner is configured to determine a scan time corresponding to the main field-of-view area and a scan time corresponding to the peripheral field-of-view area to be different from each other.

6 . The display device of claim 1 , wherein the scan time determiner is configured to determine a scan time corresponding to the main field-of-view area to be longer than a scan time corresponding to the peripheral field-of-view area.

7 . The display device of claim 1 , wherein the scan time determiner is configured to reduce a scan time of a scan signal corresponding to the peripheral field-of-view area as a distance between the peripheral field-of-view area and the main field-of-view area increases.

8 . The display device of claim 7 , wherein a mean of scan times of scan signals corresponding to the peripheral field-of-view area is smaller than the scan time of the main field-of-view area.

9 . The display device of claim 1 , wherein the display panel is disposed in a virtual reality (VR) system or an augmented reality (AR) system.

10 . An image display method, comprising:

receiving a sensor value of a user movement detected by a motion sensor;

determining a user gaze on a display panel based on the sensor value;

dividing the display panel into a main field-of-view area and a peripheral field-of-view area based on the determined user gaze;

determining a scan time of a scan signal corresponding to the main field-of-view area and a scan time of a scan signal corresponding the peripheral field-of-view area; and

applying a data voltage to the display panel according to the determined scan time,

wherein in response to it is determined that the user gaze is fixed for a threshold time or more, scan signals are configured to have a same scan time for the entire display panel.

11 . A display device, comprising:

a display panel including a plurality of sub-pixels;

a motion sensor configured to determine a movement of a user with respect to the display panel;

a controller communicatively coupled to the motion sensor, the controller configured to:

determine a user gaze at the display panel based on movement information of the user detected by the motion sensor; and

divide the display panel into a main field-of-view area and a peripheral field-of-view area based on the determined user gaze,

wherein the main field-of-view area in which at least one first sub-pixel among the plurality of sub-pixels is disposed is configured to have a first luminance level and the peripheral field-of-view area in which at least one second sub-pixel among the plurality of sub-pixels is disposed is configured to have a second luminance level different from the first luminance level, and

wherein a first scan pulse width corresponding to the at least one first sub-pixel in the main field-of-view area is different from a second scan pulse width corresponding to the at least one second sub-pixel in the peripheral field-of-view area.

12 . The display device of claim 11 , wherein the second luminance level is lower than the first luminance level.

13 . The display device of claim 11 , comprising a third sub-pixel in the peripheral field-of-view area, the third sub-pixel further from the main field-of-view area than the second sub-pixel, and

the controller is configured to control the third sub-pixel to have a third luminance level that is lower than the second luminance level.

14 . The display device of claim 11 , wherein the first sub-pixel includes a first storage capacitor, and the second sub-pixel includes a second storage capacitor;

the controlling the first sub-pixel to have the first luminance level includes controlling to charge the first storage capacitor for the first scan pulse width; and

the controlling the second sub-pixel to have the second luminance level includes controlling to charge the second storage capacitor for the second scan pulse width.

15 . The display device of claim 14 , wherein the second scan pulse width is smaller than the first scan pulse width.

16 . The display device of claim 11 , wherein the motion sensor includes one or more of a gyroscope or an accelerometer.

17 . The display device of claim 11 , wherein the motion sensor is configured to detect one or more of a head movement, a body movement, or an eye ball movement of the user.

18 . The display device of claim 11 , wherein the controller is configured to determine an area of the display where the user gaze is at as the main field-of-view area.

19 . The display device of claim 11 , wherein in response to determining that the user gaze have been fixed for a threshold time, the controller is configured to control the first sub-pixel and the second sub-pixel to have a same luminance level.