TILED DISPLAY WITH OVERLAPPING FLEXIBLE SUBSTRATES

• US 20110057861A1
• Filed: 09/08/2009
• Published: 03/10/2011
• Est. Priority Date: 09/08/2009
• Status: Active Grant

• Current Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Original Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Inventors: Hamer, John W., Cok, Ronald S.
• Granted Patent: US 8,305,294 B2
• Time in Patent Office: Days
• US Class Current: 345/1.3
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/813 characterised by their shape
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/18 Tiled displays
• CPC Class Codes: H10K 59/80515 characterised by their shape
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

A tiled display apparatus includes at least five functionally identical transparent partially-overlapped display tiles arranged in two dimensions, each display tile including pixels arranged in a two-dimensional array, and the display tiles being disposed so that light emitted by pixels located beneath a neighboring display tile at the edge of the pixel array passes through the neighboring display tile.

Claims

1. A tiled display apparatus, comprising:

at least five functionally identical transparent partially-overlapped display tiles arranged in two dimensions, each display tile including pixels arranged in a two-dimensional array, and the display tiles being disposed so that light emitted by pixels located beneath a neighboring display tile at the edge of the pixel array passes through the neighboring display tile.

3. The tiled electro-luminescent display apparatus of claim 1, further including a black matrix material formed on the transparent flexible substrate or transparent flexible cover in the first transparent, second, third transparent or fourth tile areas of one or more display tiles.

4. The tiled electro-luminescent display apparatus of claim 1, wherein the transparent flexible substrate or transparent flexible cover has a vertical edge, and further including a black matrix material located on the vertical edge of the transparent flexible substrate or transparent flexible cover.

5. The tiled electro-luminescent display apparatus of claim 1, wherein the first transparent tile area or the third transparent tile area has a vertical edge that is located laterally between two pixels on the corresponding neighboring tile.

6. The tiled electro-luminescent display apparatus of claim 1,

a) wherein the second and fourth display tile areas are larger than the first and third transparent tile areas, respectively;

and

b) the first or second electrode has an extended electrode portion extending a distance greater than the corresponding inter-pixel distance into the second or fourth tile area, and the first or second electrode does not extend a distance greater than the corresponding inter-pixel distance into the corresponding first or third transparent tile area.

7. The tiled electro-luminescent display apparatus of claim 6, wherein at least a portion of the second tile area is disposed beneath the pixel array of the second neighboring display tile.

8. The tiled electro-luminescent display apparatus of claim 6, further including one or more display tile controller(s) located on the second or fourth tiles areas of one or more display tiles, the one or more display tile controller(s) being connected to the first or second electrodes of the corresponding display tile(s).

9. The tiled electro-luminescent display apparatus of claim 8, wherein the one or more display tile controller(s) are chiplets having separate substrates independent of the transparent flexible substrate or transparent flexible cover of the display tile(s).

10. The tiled electro-luminescent display apparatus of claim 8, wherein the display tile controller(s) are electrically connected to the display tile controller(s) of a neighboring tile with a communication buss.

11. The tiled electro-luminescent display apparatus of claim 8, wherein the one or more display tile controller(s) are passive-matrix controller(s) and the pixel array is controlled as a passive-matrix pixel array.

12. The tiled electro-luminescent display apparatus of claim 1, further including fifth and sixth neighboring display tiles and wherein:

a) the first transparent tile area of the third neighboring display tile is disposed above the second tile area of the fifth neighboring display tile so that light emitted from the second edge pixels of the fifth neighboring display tile is transmitted through the first transparent tile area of the third neighboring display tile,

b) the third transparent tile area of the first neighboring display tile is disposed above the fourth the area of the fifth neighboring display tile so that light emitted from the fourth edge pixels of the fifth neighboring display tile is transmitted through the third transparent tile area of the first neighboring tile;

c) the first transparent tile area of the sixth neighboring display tile is disposed above the second tile area of the third neighboring display tile so that light emitted from the second edge pixels of the third neighboring display tile is transmitted through the first transparent tile area of the sixth neighboring display tile,

d) the third transparent tile area of the second neighboring display tile is disposed above the fourth tile area of the sixth neighboring display tile so that light emitted from the fourth edge pixels of the sixth neighboring display tile is transmitted through the third transparent tile area of the second neighboring tile; and

e) wherein the pixels in the pixel arrays of the display tile and the fifth, sixth, third, and first neighboring display tiles do not overlap, form a regular, two-dimensional pixel array, and are separated by the respective inter-pixel distances in each of the dimensions.

13. The tiled electro-luminescent display apparatus of claim 12, wherein the fifth, third, and sixth neighboring display tiles are offset laterally with respect to the first and second neighboring display tiles.

14. The tiled electro-luminescent display apparatus of claim 1, wherein each display tile has a first flat portion located above the second tile area of the first neighboring display tile, a curved portion in the display area, and a second flat portion in the second tile area, the second flat portion being adjacent to, and in a common plane with, a second flat portion of the second tile area of the first neighboring display tile.

15. The tiled electro-luminescent display apparatus of claim 1, wherein the transparent flexible substrate and transparent flexible cover of one or more display tile(s) have respective edges and wherein the edges are jagged or stepped.

16. The tiled electro-luminescent display apparatus of claim 1, wherein the transparent flexible substrate and transparent flexible cover of the display tiles have respective edges and wherein the transparent flexible substrate and transparent flexible cover of the display tiles have different sizes so that the transparent flexible substrate extends beyond the edge of the transparent flexible cover, or the transparent flexible cover extends beyond the edge of the transparent flexible substrate, on one or more sides.

17. The tiled electro-luminescent display apparatus of claim 1, wherein the transparent flexible substrate or transparent flexible cover has a thickness equal to or less than the inter-pixel distance in one or both dimensions.

18. The tiled electro-luminescent display apparatus of claim 1, wherein the pixels have sizes in one or more dimensions and either or both of the transparent flexible substrate or transparent flexible cover has a thickness equal to or less than the pixel width in at least one dimension.

19. The tiled electro-luminescent display apparatus of claim 1, further comprising an emitted-light-diffusing element optically integrated with the one or more layers of light-emitting material.

20. The tiled electro-luminescent display apparatus of claim 1, further comprising an array of color filters located in correspondence with the pixels and a black matrix located between the color filters, and wherein the one or more layers of light-emitting material emit white light to form a full-color tiled display.

2. A tiled electro-luminescent display apparatus, comprising:

(a) a plurality of display tiles arranged in a regular two-dimensional array, each display tile including;

i) a transparent flexible substrate and a transparent flexible cover affixed to the transparent flexible substrate;

ii) a first electrode formed over the transparent flexible substrate, one or more layers of light-emitting material formed over the first electrode, and a second electrode formed over the one or more layers of light-emitting material;

iii) wherein the first or second electrode forms independently-controllable light-emitting pixels arranged in rows and columns of a regular, two-dimensional, four-sided pixel array defining a display area, the pixel array having first edge pixels located on the edge of a first side of the pixel array, second edge pixels located on the edge of a second side of the pixel array opposite the first side, third edge pixels located on the edge of a third side of the pixel array adjacent to the first and second sides, and fourth edge pixels located on the edge of a fourth side of the pixel array opposite the third side and adjacent to the first and second sides, each pixel separated from a neighboring pixel by a respective inter-pixel distance in each of the two dimensions;

iv) wherein the transparent flexible substrate or transparent flexible cover extends beyond the pixel array on all four sides of the pixel array a distance greater than the inter-pixel distance in the respective dimensions, the transparent flexible substrate or transparent flexible cover extensions defining a first transparent tile area on the first side of the pixel array, a second tile area on the second side of the pixel array opposite the first side, a third transparent tile area on the third side of the pixel array adjacent to the first and second sides, a fourth tile area on the fourth side of the pixel array opposite the third side and adjacent to the first and second sides; and

v) wherein the first, second, third and fourth tile areas do not include pixels; and

(b) wherein the display tiles are arranged so that;

i) the first transparent tile area of each display tile is disposed above the second tile area of a first neighboring display tile so that light emitted from the second edge pixels of the first neighboring display tile is transmitted through the first transparent tile area,

ii) the second tile area of each display tile is disposed below the first tile area of a second neighboring display tile so that light emitted from the second edge pixels is transmitted through the first transparent tile area of the second neighboring tile;

iii) the third transparent tile area of each display tile is disposed above the fourth tile area of a third neighboring display tile so that light emitted from the fourth edge pixels of the third neighboring display tile is transmitted through the third transparent tile area; and

iv) the fourth tile area of each display tile is disposed below the third transparent tile area of a fourth neighboring display tile so that light emitted from the fourth edge pixels is transmitted through the third transparent tile area of the fourth neighboring tile; and

v) wherein the pixels in the pixel arrays of each display tile and the neighboring display tiles do not overlap, form a regular, two-dimensional pixel array, and are separated by the respective inter-pixel distances in each of the dimensions.