Display apparatus, and electronic apparatus including the same

1 . A display apparatus, comprising:

a display panel including a first display area and a second display area disposed adjacent to the first display area; and

a display panel driver configured to determine an update boundary point indicating a boundary between the first display area and the second display area, determine whether the update boundary point differs from a previous boundary point, and in response to determining that the update boundary point differs from the previous boundary point, determines first pixels of the display panel that correspond to the first display area and second pixels of the display panel that correspond to the second display area based on the update boundary point, outputs a first data voltage to at least one of the first pixels for a grayscale value of a display image, and outputs a second data voltage different from the first data voltage to at least one of the second pixels for the same grayscale value when the first display area operates in a public mode and the second display area operates in a private mode, and

wherein a viewing angle of the display image displayed in the private mode is narrower than a viewing angle of the display image displayed in the public mode.

2 . The display apparatus of claim 1 , wherein when the first display area operates in the public mode and the second display area operates in the private mode, the first data voltage is generated based on a first gamma lookup table and the second data voltage is generated based on a second gamma lookup table different from the first gamma lookup table.

3 . The display apparatus of claim 2 , wherein a unit area luminance represented by a gamma reference voltage of the second gamma lookup table is higher than a unit area luminance represented by a gamma reference voltage of the first gamma lookup table.

4 . The display apparatus of claim 1 , wherein when both the first display area and the second display area operate in the public mode or both the first display area and the second display area operate in the private mode, the first data voltage output by the display panel driver to the first display area and the second data voltage output by the display panel driver to the second display area are about equal to each other for the same grayscale value.

5 . The display apparatus of claim 4 , wherein when both the first display area and the second display area operate in the public mode, the first data voltage output by the display panel driver to the first display area and the second data voltage output by the display panel driver to the second display area are generated based on a first gamma lookup table, and

wherein when both the first display area and the second display area operate in the private mode, the first data voltage output by the display panel driver to the first display area and the second data voltage output by the display panel driver to the second display area are generated based on a second gamma lookup table different from the first gamma lookup table.

6 . The display apparatus of claim 5 , wherein a unit area luminance represented by a gamma reference voltage of the second gamma lookup table is higher than a unit area luminance represented by a gamma reference voltage of the first gamma lookup table.

7 . The display apparatus of claim 1 , wherein when the first display area operates in the public mode and the second display area operates in the private mode, the display panel driver is configured to determine an update driving mode and the update boundary point.

8 . The display apparatus of claim 7 , wherein when a previous driving mode and the update driving mode are the same as each other and the previous boundary point and the update boundary point are the same as each other, the display panel driver is configured to maintain a previous gamma lookup table.

9 . The display apparatus of claim 7 , wherein when a previous driving mode and the update driving mode are different from each other or the previous boundary point and the update boundary point are different from each other and a scan direction of the display panel is perpendicular to a direction in which the first display area and the second display area are adjacent to each other, the display panel driver is configured to generate a data enable count signal by counting a data enable signal.

10 . The display apparatus of claim 9 , wherein when the previous driving mode and the update driving mode are different from each other or the previous boundary point and the update boundary point are different from each other, the scan direction of the display panel is perpendicular to the direction in which the first display area and the second display area are adjacent to each other, and the data enable count signal is less than the update boundary point, a data voltage of a present time point is generated using a first gamma lookup table, and

wherein when the previous driving mode and the update driving mode are different from each other or the previous boundary point and the update boundary point are different from each other, the scan direction of the display panel is perpendicular to the direction in which the first display area and the second display area are adjacent to each other, and the data enable count signal is equal to or greater than the update boundary point, the data voltage of the present time point is generated using a second gamma lookup table different from the first gamma lookup table.

11 . The display apparatus of claim 7 , wherein when a previous driving mode and the update driving mode are different from each other or the previous boundary point and the update boundary point are different from each other and a scan direction of the display panel is parallel to a direction in which the first display area and the second display area are adjacent to each other, the display panel driver is configured to generate a gate line count signal.

12 . The display apparatus of claim 11 , wherein when the previous driving mode and the update driving mode are different from each other or the previous boundary point and the update boundary point are different from each other, the scan direction of the display panel is parallel to the direction in which the first display area and the second display area are adjacent to each other, and the gate line count signal is less than the update boundary point, a data voltage of a present time point is generated using a first gamma lookup table, and

wherein when the previous driving mode and the update driving mode are different from each other or the previous boundary point and the update boundary point are different from each other, the scan direction of the display panel is parallel to the direction in which the first display area and the second display area are adjacent to each other, and the gate line count signal is equal to or greater than the update boundary point, the data voltage of the present time point is generated using a second gamma lookup table different from the first gamma lookup table.

13 . The display apparatus of claim 1 , wherein the display panel includes a normal pixel and a viewing angle control pixel, and

wherein a viewing angle of the viewing angle control pixel is narrower than a viewing angle of the normal pixel.

14 . The display apparatus of claim 13 , wherein a size of a light-emitting area of a subpixel of the viewing angle control pixel is smaller than a size of a light-emitting area of a subpixel of the normal pixel.

15 . The display apparatus of claim 13 , wherein the normal pixel is turned on and the viewing angle control pixel is turned off in the public mode, and

wherein the normal pixel is turned off and the viewing angle control pixel is turned on in the private mode.

16 . The display apparatus of claim 13 , wherein the normal pixel is turned on and the viewing angle control pixel is turned on in the public mode, and

wherein the normal pixel is turned off and the viewing angle control pixel is turned on in the private mode.

17 . The display apparatus of claim 13 , wherein the display panel includes:

a first color first normal subpixel, a second color first normal subpixel and a third color first normal subpixel which are sequentially disposed in a first pixel row; and

a first color first viewing angle control subpixel, a second color first viewing angle control subpixel, a third color 1-1 viewing angle control subpixel and a third color 1-2 viewing angle control subpixel which are sequentially disposed in a second pixel row.

18 . The display apparatus of claim 17 , wherein a size of a light-emitting area of the first color first normal subpixel is larger than a size of a light-emitting area of the first color first viewing angle control subpixel,

wherein a size of a light-emitting area of the second color first normal subpixel is larger than a size of a light-emitting area of the second color first viewing angle control subpixel, and

wherein a size of a light-emitting area of the third color first normal subpixel is larger than a sum of a size of a light-emitting area of the third color 1-1 viewing angle control subpixel and a size of a light-emitting area of the third color 1-2 viewing angle control subpixel.

19 . The display apparatus of claim 13 , wherein the display panel includes:

a first color first normal subpixel, a second color 1-1 normal subpixel, a second color 1-2 normal subpixel and a third color first normal subpixel disposed in a rhombic shape; and

a first color first viewing angle control subpixel, a second color 1-1 viewing angle control subpixel, a second color 1-2 viewing angle control subpixel and a third color first viewing angle control subpixel disposed in a rhombic shape.

20 . An electronic device, comprising:

a processor;

a memory having stored application programs for execution by the processor;

a display apparatus, comprising:

a display panel including a first display area and a second display area disposed adjacent to the first display area;

a display panel driver configured to determine an update boundary point indicating a boundary between the first display area and the second display area, determine whether the update boundary point differs from a previous boundary point, and in response to determining that the update boundary point differs from the previous boundary point, determines first pixels of the display panel that correspond to the first display area and second pixels of the display panel that correspond to the second display area based on the update boundary point, outputs a first data voltage to at least one of the first pixels for a grayscale value of a display image, and outputs a second data voltage different from the first data voltage to at least one of the second pixels for the same grayscale value when the first display area operates in a public mode and the second display area operates in a private mode, and

wherein a viewing angle of the display image displayed in the private mode is narrower than a viewing angle of a display image displayed in the public mode; and

a user interface configured to sense user input via touch or cursor select of an icon presented on the display panel, wherein the processor is caused to execute one or more of the stored application programs upon receipt of the user input.