Display device and luminance correction method of the same
A display device includes a display unit including a plurality of pixels to display a display image, a luminance detector to detect luminance of an image on the display unit, and a display driver. The display divider is to divide the display unit into image areas symmetrical to each other and to adjust a luminance of an image area having a relatively lower luminance value among the image areas symmetrical to each other based on a luminance detection result.
1. A display device, comprising:
a display unit including a plurality of pixels to display a display image;
a luminance detector to detect luminance of an image on the display unit;
a display driver to divide the display unit into image areas symmetrical to each other and to adjust a luminance of an image area having a relatively lower luminance value between the image areas symmetrical to each other based on a luminance detection result; and
a lens unit including a lens to focus the image on an eyeball of a user.
2. The display device as claimed in claim 1 , wherein the image includes the display image and a reflected image reflected by the lens.
3. The display device as claimed in claim 1 , wherein the display driver is to divide the image into the image areas to be symmetrical to each other about an optical axis of the lens.
4. The display device as claimed in claim 1 , wherein the display driver is to:
calculate a luminance difference between a first luminance of a first image area in which the image is displayed and a second luminance of a second image area symmetrical to the first image area among the image areas; and
adjust the second luminance so that the luminance difference is less than a reference luminance difference included in a look-up table, and
wherein the second luminance is less than the first luminance.
5. The display device as claimed in claim 4 , wherein the display driver is to gradually increase the second luminance so that the second luminance decreases toward a center of symmetry in the second image area.
6. The display device as claimed in claim 4 , wherein the display driver is to increase the second luminance of an entirety of the second image area.
7. The display device as claimed in claim 4 , wherein the reference luminance difference is set to correspond to reflectivity of the lens.
8. The display device as claimed in claim 4 , wherein the reference luminance difference is set based on reflectivity of the display unit.
9. The display device as claimed in claim 4 , wherein the look-up table includes reflectivity of the display unit, reflectivity of the lens, and the reference luminance difference.
10. A display device, comprising:
a display unit including a plurality of pixels to display a display image;
a luminance detector to detect luminance of an image on the display unit; and
a display driver to divide the display unit into image areas symmetrical to each other and to adjust a luminance of an image area having a relatively lower luminance value between the image areas symmetrical to each other based on a luminance detection result, wherein the display driver is to adjust luminances of the image areas so that luminance differences between image areas symmetrical to each other are less than a reference luminance difference.
11. A method of correcting luminance of a display device to display a display image, the method comprising:
detecting luminance of an image on a display unit;
dividing the image into image areas symmetrical to each other;
calculating a luminance difference between the image areas; and
adjusting a luminance of an image area having a relatively lower luminance value among the image areas symmetrical to each other based on the luminance difference, wherein dividing the image includes dividing the image into the image areas that are symmetrical to each other about an optical axis of a lens focusing the image on an eyeball of a user.
12. The method as claimed in claim 11 , wherein the image areas include a first image area in which the image is displayed having a first luminance and a second image area having a second luminance less than the first luminance.
13. The method as claimed in claim 12 , wherein adjusting the luminance includes gradually increasing the second luminance in the second image area so that the second luminance increases away from a center of symmetry in the second image area.
14. The method as claimed in claim 12 , wherein adjusting the luminance includes increasing the second luminance over an entirety of the second image area.
15. The method as claimed in claim 11 , wherein adjusting the luminance includes adjusting luminances so that luminance differences between image areas symmetrical to each other are less than a reference luminance difference.
16. The method as claimed in claim 15 , wherein the reference luminance difference is stored in a look-up table that includes reflectivity of the display unit and reflectivity of a lens focusing the image on the eyeball of the user.