Bezel-free display tile with edge-wrapped conductors and methods of manufacture
Display tiles comprising pixel elements on a first surface of a substrate connected by an electrode, a driver located opposite the first surface, and a connector wrapped around an edge surface of the substrate connecting the driver to the pixel elements. Displays comprised of display tiles and methods of manufacturing display tiles and displays are also disclosed.
1. A display tile comprising:
a first substrate comprising a first surface, a second surface opposite the first surface and an edge surface between the first surface and the second surface, the edge surface defining an outer perimeter;
the first surface comprising an array of pixel elements arranged in a plurality of rows of pixel elements and a plurality of columns of pixel elements, each row of pixel elements connected by a row electrode and each column of pixel elements connected by a column electrode;
a row driver that activates the rows of pixel elements and a column driver that activates the columns of pixel elements, the row and the column drivers located opposite the first surface;
a plurality of row electrode connectors, each row electrode connector wrapped around the edge surface and electrically connecting a row electrode, a row of pixel elements and the row driver; and
a plurality of column electrode connectors, each column electrode connector wrapped around the edge surface and electrically connecting a column electrode, a columns of pixel elements and the column driver,
wherein when any edge surface of the display tile is placed in close proximity to an adjacent display tile of a tile display, a pixel pitch across a tile-to-tile seam of the tile display is approximately matched to that within the display tile.
2. The display tile of claim 1 , wherein the display tile is free of a bezel around the outer perimeter.
3. The display tile of claim 1 , wherein each row electrode connector and each column electrode connector comprises a conductive coating, conductive layer or conductive ink deposited by electroplating, electroless plating, printing, aerojet printing, deposition, or ink jet printing.
4. The display tile of claim 3 , wherein the conductor is selected from copper and silver.
5. The display tile of claim 3 , wherein the row and the column drivers are on the second surface of the first substrate.
6. The display tile of claim 3 , wherein the second surface is on a second substrate.
7. The display tile of claim 6 , wherein the second substrate is in a stacked arrangement with the first substrate.
8. The display tile of claim 3 , wherein the first substrate comprises a glass-based substrate.
9. The display of claim 8 , wherein a thickness d 1 of the glass-based substrate ranges from about 0.1 mm to about 3 mm.
10. The display tile of claim 3 , wherein the conductive coating, conductive layer, or conductive ink comprises metal nanoparticles.
11. The display tile of claim 1 , wherein the second surface is on the first substrate and the edge surface is shaped so that a first corner is formed between the edge surface and the first surface and a second corner is formed between the edge surface and the second surface, and the first corner and the second corner do not include a 90 degree angle or undercut angle.
12. The display tile of claim 11 , wherein the edge surface is comprises a curved cross-section.
13. The display tile of claim 11 , wherein the edge surface comprises a polygonal cross-section.
14. The display tile of claim 11 , wherein the edge surface comprises an etched surface.
15. The display tile of claim 11 , where the edge surface comprises an edge-ground surface.
16. The display tile of claim 11 , wherein the edge surface comprises a plasma-treated surface.
17. The display tile of claim 11 , wherein the edge surface is non-linear and comprises a plurality of recessed areas.
18. The display tile of claim 17 , wherein at least one of the row electrode connectors and at least one of the column electrode connectors are disposed within a recessed area.
19. A display comprising a first display tile as defined by claim 1 .
20. The display tile of claim 19 , wherein the display comprises a micro LED and the pixel elements are located within 500 micrometers from the edge surface.
21. A display comprising the second display tile as defined by claim 1 in close proximity to the first substrate.
22. The display of claim 21 , wherein the display is selected from the group consisting of a liquid crystal display (LCD), a light emitting display (LED), a micro LED, electrophoretic, e-paper, and an organic light emitting display (OLED).