Tiled display and image correction method
A tiled display includes a plurality of display devices respectively including a plurality of pixels, and a main controller that processes an input image signal to provide an image signal to the plurality of display devices. Based on distance data between adjacent display devices among the plurality of display devices, the main controller generates a corrected image signal that increases luminance near a boundary portion of the adjacent display devices.
1. A tiled display comprising:
a plurality of display devices respectively including a plurality of pixels; and
a main controller that processes an input image signal to provide an image signal to the plurality of display devices,
wherein, based on distance data between adjacent display devices among the plurality of display devices, the main controller generates a corrected image signal that increases luminance near a boundary portion of the adjacent display devices,
wherein the distance data is based on a distance between adjacent pixels in the adjacent display devices or a distance between outermost portions of the adjacent display devices,
wherein the main controller generates the corrected image signal when a distance provided by the distance data is within a predetermined value, and generates a normal image signal when the distance provided by the distance data is outside of the predetermined value, and
wherein even if the distance is within the predetermined value, when a black image is displayed near the boundary portion, the main controller generates a normal image signal.
2. The tiled display of claim 1 , wherein
the distance data is based on a distance between adjacent pixels in the adjacent display devices or a distance between outermost portions of the adjacent display devices.
3. The tiled display of claim 1 , wherein
increasing luminance near the boundary portion includes increasing luminance of one or more pixel rows or pixel columns adjacent to the boundary portion.
4. The tiled display of claim 1 , wherein
increasing luminance near the boundary portion includes gradually increasing luminance of a plurality of pixel rows or pixel columns adjacent to the boundary portion toward the boundary portion.
5. The tiled display of claim 1 , further comprising:
a distance measurer configured to generate distance data between the plurality of display devices to provide the distance data to the main controller.
6. The tiled display of claim 5 , wherein
the distance measurer includes a plurality of sensors respectively disposed in the plurality of display devices.
7. The tiled display of claim 6 , wherein
the plurality of sensors include a main sensor disposed in one of the plurality of display devices and a sub-sensor disposed at remaining display devices of the plurality of display devices, and
the main sensor measures a distance to the sub-sensor to generate the distance data.
8. The tiled display of claim 6 , wherein
the distance measurer generates off-center distance data between a central display device disposed at a center of the plurality of display devices and display devices surrounding the central display device, and
the main controller generates the corrected image signal based on the distance data and the off-center distance data.
9. An image correction method of a tiled display including a plurality of display devices, comprising:
generating distance data between adjacent display devices among the plurality of display devices;
generating a corrected image signal that increases luminance near a boundary portion of the adjacent display device, based on an input image signal and the distance data; and
displaying a corrected image with increased luminance near the boundary portion according to the corrected image signal,
wherein the corrected image signal generates the corrected image signal when a distance provided by the distance data is within a predetermined value, and
wherein even if the distance is within the predetermined value, when a black image is displayed near the boundary portion, a normal image signal is generated.
10. The image correction method of claim 9 , wherein
the distance data is generated based on a distance between adjacent pixels in the adjacent display devices or a distance between outermost portions of the adjacent display devices.
11. The image correction method of claim 9 , wherein
the displaying of the corrected image includes increasing luminance of one or more pixel rows or pixel columns adjacent to the boundary portion.
12. The image correction method of claim 9 , wherein
the displaying of the corrected image includes gradually increasing luminance of a plurality of pixel rows or pixel columns adjacent to the boundary portion toward the boundary portion.
13. The image correction method of claim 9 , wherein
the generating of the distance data includes measuring a distance between a plurality of sensors respectively disposed in the plurality of display devices.
14. The image correction method of claim 9 , wherein
the generating of the distance data includes measuring a distance between a plurality of sub-sensors disposed in the plurality of display devices and a main sensor disposed outside the tiled display.
15. The image correction method of claim 9 , further comprising
generating off-center distance data between a central display device disposed at a center among a plurality of display devices and display devices surrounding the central display device,
wherein the corrected image signal is generated based on the input image signal, the distance data, and the off-center distance data.
16. The image correction method of claim 15 , wherein
a corrected image in which luminance near the boundary portion is increased and luminance of a central portion of the tiled display is increased according to the corrected image signal is displayed.