US20020163301A1 - Large format emissive display - Google Patents
Large format emissive display Download PDFInfo
- Publication number
- US20020163301A1 US20020163301A1 US09/847,447 US84744701A US2002163301A1 US 20020163301 A1 US20020163301 A1 US 20020163301A1 US 84744701 A US84744701 A US 84744701A US 2002163301 A1 US2002163301 A1 US 2002163301A1
- Authority
- US
- United States
- Prior art keywords
- display
- backframe
- modules
- tiles
- backplate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
A backframe may be utilized to align a plurality of emissive display tiles precisely with respect to one another. The individual display tiles may be removable from the backframe for replacement or other reasons. As a result, the spacing between individual tiles in an overall large format display may be precisely controlled in some cases. In addition, regularly occurring gaps between adjacent tiles may be filled with a suitable light absorbing material to reduce the visibility of seams.
Description
- This invention relates generally to large format emissive displays.
- Large format displays may be utilized to create displays of a size greater than the size of conventional displays. For example, large format displays may combine the images produced from a plurality of conventional displays. The composite display may be able to produce an image which is much larger and more economical than that possible with existing display technologies.
- Emissive displays include light emitting diodes, liquid crystal displays, and organic light emitting displays. These displays actually emit light at the pixel level which can perceived by viewers. Emissive displays may be combined together to create a large format display.
- When emissive displays are combined to create a large format display, those displays may suffer from visible seams. The visible seams arise from the joints between the combined displays. The user looking at the large format display notices the individual displays which together are combined to create the overall image. Thus in some cases, the large format display may not produce a seamless image.
- Another problem with large format displays is that the individual displays that are combined to form the large format display may be misaligned with respect to one another. Even the slightest misalignment may result in an irregularity in the overall image that may be noticeable to anyone viewing the large format display.
- Thus, there is a need for better ways to combine emissive displays into large format displays.
- FIG. 1 is a perspective view of an emissive display tile in accordance with one embodiment of the present invention;
- FIG. 2 is a side elevational view of an emissive display module in accordance with one embodiment of the present invention; and
- FIG. 3 is a front elevational view of a large format display in accordance with one embodiment of the present invention.
- Referring to FIG. 1, an
emissive display tile 100 may include a plurality ofelectroluminescent cells 20 each producing a pixel or subpixel of monochrome or color light. Thus, thecells 20 in a givendisplay tile 100 may produce one or more pixels or subpixels of light which can contribute to the display of an image. In some cases, a large number ofcells 20 may be utilized. In another case, fewer cells may be appropriate. - The
display tile 100 may include an integratedcircuit driver chip 10. Thechip 10, mounted on the lower surface of thedisplay tile 100, actually drives thedisplay cells 20 by way of electrical connections in feedthroughs (not shown). - The
tile 100 may include abody 24. In one embodiment, thebody 24 may be a ceramic layer. Over thebody 24 is atransparent layer 104 which may be formed of glass. A black material 102 is applied in a grid pattern on the top surface of thetransparent layer 104. - The
emissive cells 20 may actually be formed on the bottom surface of thetransparent layer 104. Thecells 20 are then visible from above, as shown in FIG. 1, because of the transparent nature of thetransparent layer 104. In one embodiment, eachcell 20 may include three light emitting elements such as a red, green and blue light emitting element. - The black material102 includes an
intermediate section 102 a of greater width and aperipheral section 102 b that may be less than one-half the width of thematerial 102 a. Thus, whentiles 100 are butted one against the other and a slight gap is left between adjacent tiles, the combinedsections 102 b from twoadjacent tiles 100 have a resulting width approximately equal to that of thesection 102 a. As a result, when the combined display is viewed, it has a consistent matrix pattern of pixels. - The black material102 forms a matrix that covers the voids between
individual cells 20. This may reduce reflection from electrode structures (not shown) on the bottom surface of thetransparent layer 104 thereby increasing pixel contrast. The matrix 102 may be a grid of optically black absorbing material that covers the horizontal and vertical spaces between thecells 20 in the form of horizontal and vertical stripes. In one embodimentblack material 102 a may have a width that is a fraction, usually between 0.25 and 0.5 of the pixel-to-pixel spacing, to allow for misalignment between tiles when formed onto an array of tiles. Patterning may be achieved by transfer screen printing, ink jet printing or other methods capable of producing spatial positioning tolerances and feature sizes on the order of 10 microns. - The black matrix material102 may be optically absorbing to visible wavelengths of light and resistant to removal during cleaning of the completed assembly with water or mild solvents. As one example, a black emulsion, as typically used in photomask fabrication may be used for this purpose.
- Referring to FIG. 2, the
tile 100 may be mounted on abackplate 110. Eachmodule 101, composed of atile 100 with abackplate 110, may be optically, electrically and mechanically interchangeable with a plurality of other components in accordance with one embodiment of the present invention. The module assembly is performed at an optical alignment station that provides x,y and z dimensions to tolerances of about 10 microns in each direction. This means that the smallest pixel pitch for a seamless appearance is about one millimeter. - The
backplate 110 may provide mechanical support to thedisplay tile 100. Thebackplate 110 may assembled to thedisplay tile 100 using a thin, flexible epoxy adhesive in one embodiment. - A pair of
alignment elements 112 on thebackplate 110 provide x and y alignment control at display assembly between thedisplay tile 100 and thebackplate 110. A variety ofalignment elements 112 may be used including holes, grooves, tabs, and a variety of pin shapes as a few examples. Anexemplary backplate 110 thickness may be one millimeter or more. - The
backplate 110 may be smaller in size than thetile 100 by about one millimeter or more in one embodiment. Cut out regions (not shown) in thebackplate 110 may provide clearance for tile electronics such as thechip 10 and connectors that are disposed on the back side of thetile 100. Thebackplate 110 may also includefastener extensions 114 for attachment to a backframe (not shown in FIG. 2). - Referring to FIG. 3, the
backframe 120 may include a number ofalignment devices 124 to receive thealignment elements 112 andfasteners 114 of a plurality ofmodules 101. Thealignment devices 124 may be pins, holes, grooves, or tabs, as a few examples. Thealignment devices 124 mate with and align thealignment elements 112. As a result, a large number ofmodules 101 may be secured on thebackframe 120 in precise relative alignment. Thefasteners 114 may be secured onto thebackframe 120 usingnuts 122 as one example. However, any of a variety of other fasteners may be utilized as well, including rivets, releasable catches, friction welds, and solder, as additional examples. - The seams between
adjacent modules 101 can then be filled by an optically clear, substantially index matchinggap material 128. Thegap material 128 may be an adhesive such as an acrylic or silicone adhesive. Thegap material 128, for example, may be dispensed by syringe from the front side of thelarge format display 200. Thegap material 128 may reduce the amount light scattered from the edges of each panel which would otherwise cause a seam to be visible, particularly when viewed off-axis. - To aid in the replacement of the
individual display modules 101, a reworkable adhesive may be utilized as thegap material 128 in one embodiment. For example, an ultraviolet degradable epoxy may be used. - A black patterned
coating 126 may be applied to the front of thelarge format display 200 in a form of horizontal and vertical stripes to cover the front of the seams, for example using a syringe. The width of thecoating 126 may substantially match the width of the stripes ofmaterial 102 a patterned on theindividual tiles 100. The material used in thecoating 126 may be identical to or similar in optical and mechanical properties to the material 102 used to pattern the stripes on theindividual tiles 100. - The patterning results in a visual effect that presents a low contrast mesh pattern superimposed over the displayed image. This pattern may become part of the pixelated structure of the display, at a spatial frequency equal to that of the pixels. For normal viewing the distances between the fine structure of this pattern may not be resolvable in some embodiments. If one
tile 100 must be replaced, itsmodule 101 may be readily disconnected from thebackframe 120. - While the present invention has been described with respect to a limited number of embodiments, those skilled in the art will appreciate numerous modifications and variations therefrom. It is intended that the appended claims cover all such modifications and variations as fall within the true spirit and scope of this present invention.
Claims (30)
1. A large format display comprising:
a plurality of emissive display modules, each module including at least two alignment elements; and
a backframe including a plurality of alignment devices to mate with the alignment elements of said display modules.
2. The display of claim 1 wherein each module includes an electroluminescent display tile secured to a backplate, said backplate including said alignment elements.
3. The display of claim 2 , said display tile including front and back surfaces and including a driver chip on the back surface of said display tile and one more emissive elements on the front surface thereof.
4. The display of claim 3 , said modules including fasteners extending from said backplates.
5. The display of claim 4 including elements on said backframe that engage said fasteners to secure said backframe to said modules.
6. The display of claim 4 wherein said backframe removeably connects said modules to said backframe.
7. The display of claim 6 wherein said fasteners are threaded fasteners.
8. The display of claim 1 wherein each module includes a transparent layer and a plurality of spaced apart light emissive cells formed on said layer and defining regions between said cells.
9. The display of claim 8 including an optically absorbing material formed on said layer so as to overlay the region between the cells.
10. The display of claim 1 including a plurality of gaps between adjacent modules, said gaps being covered by an optically absorbing material.
11. The display of claim 10 including an optically clear adhesive between adjacent modules.
12. A method comprising:
engaging a plurality of emissive display modules with a backframe; and
aligning said modules with respect one another using a characteristic of said backframe.
13. The method of claim 12 wherein aligning includes causing pins on one of said modules or said backframe to engage holes in one of said modules or said backframe.
14. The method of claim 12 including forming said modules by securing light emitting tiles to a backplate having alignment elements, and causing said alignment elements to engage alignment devices on said backframe.
15. The method of claim 14 including providing tiles with a plurality of light emitting cells, and coating a region visually between the cells with optically absorbent material.
16. The method of claim 14 including filling the seams between adjacent modules with an optical adhesive.
17. The method of claim 14 including threadedly securing said modules to said backframe.
18. The method of claim 17 including filling the seams between adjacent modules with an optical adhesive material and covering the adhesive material with an optically absorbing material.
19. A system to connect tiles together to form a large format display, said system comprising:
a backplate to mount a tile, said backplate including at least two alignment pins; and
a backframe including a plurality of alignment holes to receive the pins of said backplate.
20. The system of claim 19 wherein said backplate includes fasteners extending outwardly from a surface thereof.
21. The system of claim 20 wherein a threaded fastener is utilized to secure said backplate to said backframe.
22. A method comprising:
forming a display device having a plurality of spaced, light emitting cells; and
coating the device with a matrix of light absorbing material.
23. The method of claim 22 including forming said spaced light emitting cells on one side of a transparent layer.
24. The method of claim 23 including coating a second side of said transparent layer with said absorbing material.
25. The method of claim 24 including coating said transparent layer at locations overlying the regions between spaced, light emitting cells with first stripes of black material of a first width, coating the regions between the edge displays of the devices and the light emitting cells with a black second stripe of a smaller width, and joining display devices together so that said second stripes have a combined width approximately equal to the width of said first stripes.
26. A method of forming a large format display comprising:
securing a plurality of light emissive display tiles to one another;
defining gaps between adjacent display tiles; and
filing said gaps with a light absorbing material.
27. The method of claim 26 including adhesively coupling said display tiles to one another by injecting adhesive into said gaps and covering said adhesive with a light absorbing material.
28. The method of claim 27 including using display tiles having a plurality of light emitting cells and coating the regions between said cells with a light absorbing material.
29. The method of claim 26 including securing said tiles to a support and defining structure on said tiles and said support to align said tiles.
30. The method of claim 29 including removeably mounting said tiles on said support.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/847,447 US20020163301A1 (en) | 2001-05-02 | 2001-05-02 | Large format emissive display |
US11/325,961 US7654878B2 (en) | 2001-05-02 | 2006-01-05 | Large format emissive display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/847,447 US20020163301A1 (en) | 2001-05-02 | 2001-05-02 | Large format emissive display |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/325,961 Division US7654878B2 (en) | 2001-05-02 | 2006-01-05 | Large format emissive display |
Publications (1)
Publication Number | Publication Date |
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US20020163301A1 true US20020163301A1 (en) | 2002-11-07 |
Family
ID=25300643
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/847,447 Abandoned US20020163301A1 (en) | 2001-05-02 | 2001-05-02 | Large format emissive display |
US11/325,961 Expired - Fee Related US7654878B2 (en) | 2001-05-02 | 2006-01-05 | Large format emissive display |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US11/325,961 Expired - Fee Related US7654878B2 (en) | 2001-05-02 | 2006-01-05 | Large format emissive display |
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US (2) | US20020163301A1 (en) |
Cited By (13)
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US20060244731A1 (en) * | 2003-07-10 | 2006-11-02 | Jean-Jacques Mulleris | Dynamic display system with interchangeable removable digital screens with posters in a backlighted housing |
WO2006114670A2 (en) * | 2005-04-25 | 2006-11-02 | Acol Technologies Sa | Tiling of asymmtric light source elements |
EP2023187A1 (en) * | 2007-08-06 | 2009-02-11 | Barco N.V. | Seam hider for tiled displays |
US20110080665A1 (en) * | 2009-10-05 | 2011-04-07 | Delphi Technologies, Inc. | Visual gap mitigation apparatus for a segmented display panel |
WO2014070684A1 (en) | 2012-11-01 | 2014-05-08 | Lellan, Inc | Seamless illuminated modular panel |
WO2017213368A1 (en) * | 2016-06-10 | 2017-12-14 | Samsung Electronics Co., Ltd. | Display module and method for coating the same |
US9899456B2 (en) | 2015-05-01 | 2018-02-20 | Emagin Corporation | Large area OLED microdisplay and method of manufacturing same |
US10297645B2 (en) | 2016-08-22 | 2019-05-21 | Emagin Corporation | Arrangement of color sub-pixels for full color OLED and method of manufacturing same |
WO2020050652A1 (en) * | 2018-09-05 | 2020-03-12 | Samsung Electronics Co., Ltd. | Display device and method for manufacturing the same |
WO2020101172A1 (en) * | 2018-11-15 | 2020-05-22 | Samsung Electronics Co., Ltd. | Display module and display device including inorganic light emitting element and light blocking member on connecting member |
US11164934B2 (en) * | 2019-03-12 | 2021-11-02 | X Display Company Technology Limited | Tiled displays with black-matrix support screens |
US11437451B2 (en) | 2016-09-22 | 2022-09-06 | Emagin Corporation | Large area display and method for making same |
US11561424B2 (en) * | 2020-04-21 | 2023-01-24 | Samsung Display Co., Ltd. | Tiled display device |
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US7839560B2 (en) * | 2006-12-29 | 2010-11-23 | Texas Instruments Incorporated | Packaged spatial light modulator and a display system using the same |
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US9899329B2 (en) | 2010-11-23 | 2018-02-20 | X-Celeprint Limited | Interconnection structures and methods for transfer-printed integrated circuit elements with improved interconnection alignment tolerance |
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Cited By (26)
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US20060244731A1 (en) * | 2003-07-10 | 2006-11-02 | Jean-Jacques Mulleris | Dynamic display system with interchangeable removable digital screens with posters in a backlighted housing |
WO2006114670A2 (en) * | 2005-04-25 | 2006-11-02 | Acol Technologies Sa | Tiling of asymmtric light source elements |
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EP2023187A1 (en) * | 2007-08-06 | 2009-02-11 | Barco N.V. | Seam hider for tiled displays |
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EP2312378A1 (en) | 2009-10-05 | 2011-04-20 | Delphi Technologies, Inc. | Visual gap mitigation apparatus for a segmented display panel |
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CN109219986A (en) * | 2016-06-10 | 2019-01-15 | 三星电子株式会社 | Display module and method for coating the display module |
WO2017213368A1 (en) * | 2016-06-10 | 2017-12-14 | Samsung Electronics Co., Ltd. | Display module and method for coating the same |
US10251224B2 (en) | 2016-06-10 | 2019-04-02 | Samsung Electronics Co., Ltd. | Display module and method for coating the same |
US10560988B2 (en) | 2016-06-10 | 2020-02-11 | Samsung Electronics Co., Ltd. | Display module and method for coating the same |
US10297645B2 (en) | 2016-08-22 | 2019-05-21 | Emagin Corporation | Arrangement of color sub-pixels for full color OLED and method of manufacturing same |
US11437451B2 (en) | 2016-09-22 | 2022-09-06 | Emagin Corporation | Large area display and method for making same |
US11088304B2 (en) | 2018-09-05 | 2021-08-10 | Samsung Electronics Co., Ltd. | Display device and method for manufacturing the same |
WO2020050652A1 (en) * | 2018-09-05 | 2020-03-12 | Samsung Electronics Co., Ltd. | Display device and method for manufacturing the same |
US11646399B2 (en) | 2018-09-05 | 2023-05-09 | Samsung Electronics Co., Ltd. | Display device including display modules and light absorbing pattern for covering gap between display modules and method for manufacturing the same |
WO2020101172A1 (en) * | 2018-11-15 | 2020-05-22 | Samsung Electronics Co., Ltd. | Display module and display device including inorganic light emitting element and light blocking member on connecting member |
US11462522B2 (en) | 2018-11-15 | 2022-10-04 | Samsung Electronics Co., Ltd. | Display module and display device including inorganic light emitting element and light blocking member on connecting member |
US11164934B2 (en) * | 2019-03-12 | 2021-11-02 | X Display Company Technology Limited | Tiled displays with black-matrix support screens |
US20220093724A1 (en) * | 2019-03-12 | 2022-03-24 | X Display Company Technology Limited | Tiled displays with black-matrix support screens |
US11489037B2 (en) * | 2019-03-12 | 2022-11-01 | X Display Company Technology Limited | Tiled displays with black-matrix support screens |
US11561424B2 (en) * | 2020-04-21 | 2023-01-24 | Samsung Display Co., Ltd. | Tiled display device |
Also Published As
Publication number | Publication date |
---|---|
US7654878B2 (en) | 2010-02-02 |
US20060116046A1 (en) | 2006-06-01 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |