CN111247578A

CN111247578A - Sub-display and tiled display made from sub-displays

Info

Publication number: CN111247578A
Application number: CN201880068597.XA
Authority: CN
Inventors: 米向东
Original assignee: Corning Inc
Current assignee: Corning Inc
Priority date: 2017-09-28
Filing date: 2018-09-26
Publication date: 2020-06-05
Also published as: JP2020536270A; KR20200049826A; TW201921330A; WO2019067500A1

Abstract

A secondary display for a tiled display, the secondary display comprising a central region and a first peripheral region is disclosed. The central region comprises an array of pixels, wherein each pixel comprises a first region and at least one first light source. The first peripheral region includes a first array of sub-pixels, wherein each first sub-pixel includes a second region and at least one second light source. Each second area is smaller than each first area, and each second light source first emits a lower luminous flux than each first light source.

Description

Sub-display and tiled display made from sub-displays

Cross Reference to Related Applications

This application claims priority from U.S. provisional application No. 62/564,578 filed on 28.9.2017, which is the basis of this application and is incorporated herein by reference in its entirety.

Technical Field

The present disclosure relates generally to tiled displays (tiled displays). More particularly, the present disclosure relates to tiled micro LED (micro LED) displays comprising a plurality of sub-displays arranged adjacent to one another to form a larger display.

Background

It may not be practical to fabricate large area displays on a single large area substrate. For example, the size of the display may be larger than existing processing equipment can handle and/or the yield of large display sizes may be much lower than the yield of smaller display sizes. In these cases, it is advantageous to manufacture the display by splicing a plurality of smaller sub-displays. The tiling of smaller subdisplays to create larger displays is applicable to display technologies including micro-LEDs, Organic Light Emitting Diodes (OLEDs), and Liquid Crystal Displays (LCDs). A common problem with tiled displays is visible seams between tiles due to imperfect registration (registration), pixel variation between tiles, and/or other manufacturing related factors.

Micro LEDs are small (e.g., typically less than 100 μm x 100 μm) light emitting components. They are inorganic semiconductor components, resulting in high brightness up to 5000 million nit (nit). Thus, micro LEDs are particularly suitable for high resolution and large tiled displays. However, visible seams between sub-displays of a tiled micro LED display may be unacceptable. Accordingly, disclosed herein are sub-displays and tiled displays that are fabricated from sub-displays to form seams that are less visible or invisible under expected viewing conditions.

Disclosure of Invention

Some embodiments herein relate to a secondary display for a tiled display. The secondary display includes a central region and a first peripheral region. The central region comprises an array of pixels, wherein each pixel comprises a first region and at least one first light source. The first peripheral region includes a first array of sub-pixels, wherein each first sub-pixel includes a second region and at least one second light source. Each second area is smaller than each first area, and each second light source emits a lower luminous flux than each first light source.

Another embodiment herein relates to a tiled display. The tiled display includes a first sub-display and a second sub-display adjacent to the first sub-display. Each of the first and second sub-displays includes a central region and a first peripheral region. The central region includes an array of first pixels, wherein each first pixel includes at least one first light source. The first peripheral region includes a first array of sub-pixels, wherein each first sub-pixel includes at least one second light source. Each first sub-pixel is smaller than the size of each first pixel. The first sub-pixel array of the first sub-display is adjacent to the first sub-pixel array of the second sub-display to provide a first stitched pixel array.

Other embodiments herein relate to a method for manufacturing a display. The method includes providing a plurality of secondary displays. Each sub-display comprises: the display device comprises a central area and a peripheral area, wherein the central area comprises a plurality of first pixels, and the peripheral area comprises a plurality of first sub-pixels. Each first pixel comprises at least one first micro LED and each first sub-pixel comprises at least one second micro LED, the luminous flux emitted by the at least one second micro LED being lower than the luminous flux emitted by each first micro LED. The method further includes arranging the plurality of sub-displays adjacent to one another such that the first sub-pixel of each sub-display is adjacent to the first sub-pixel of an adjacent sub-display to provide a plurality of seam pixels extending between the adjacent sub-displays.

The tiled display disclosed herein has a lower visible seam between the sub-displays. Tiled displays may also have large manufacturing errors due to lower requirements for registration (registration) of edge pixels and adjacent sub-displays.

Additional features and advantages will be set forth in the description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the embodiments described herein, including the embodiments described below, the claims, and the appended drawings.

It is to be understood that both the foregoing general description and the following detailed description describe various embodiments and are intended to provide an overview or framework for understanding the nature and character of the claimed subject matter. The accompanying drawings are included to provide a further understanding of the various embodiments, and are incorporated in and constitute a part of this specification. The drawings illustrate various embodiments described herein and together with the description serve to explain the principles and operations of the claimed subject matter.

Drawings

FIG. 1 schematically depicts an example of a sub-display;

FIG. 2 schematically depicts another example of a secondary display;

FIG. 3 schematically depicts one example of a tiled display;

FIG. 4A schematically depicts another example of a tiled display;

FIG. 4B is an enlarged view of a corner area of a sub-display of the tiled display of FIG. 4A;

FIG. 5 schematically depicts one example of a seam of a tiled display;

FIG. 6 schematically depicts another example of a seam of a tiled display;

FIG. 7 schematically depicts another example of a seam of a tiled display;

FIG. 8 schematically depicts another example of a seam of a tiled display;

FIG. 9 schematically depicts another example of a seam of a tiled display;

FIG. 10 schematically depicts another example of a seam of a tiled display; and

fig. 11 is a flowchart illustrating one example of a method for manufacturing a display.

Detailed Description

Reference will now be made in detail to the present embodiments, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. This document may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Ranges may be expressed herein as from "about" one particular value, and/or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another embodiment. It will be further understood that the endpoints of each of the ranges are both significant relative to the other endpoint, and independent of the other endpoint.

Directional phrases used herein, such as, for example, upper, lower, right, left, front, rear, top, bottom, vertical, horizontal, are used only with reference to the drawings that are drawn and are not intended to imply absolute orientations.

Unless expressly stated otherwise, it is in no way intended that any method described herein be construed as requiring that its steps be performed in a specific order, nor that it require any apparatus, specific orientation. Accordingly, where a method claim does not actually recite an order to be followed by its steps, or where any apparatus claim does not actually recite an order or direction to individual components, or where no particular recitation in the claims or specification is to the order of limitations or a particular order or direction to components of an apparatus is intended, no order or direction is intended in any way to be inferred, in any respect. This applies to any possible non-expressive basis for interpretation, including: logical issues regarding step arrangement, operational flow, component order, or component orientation; simple connotations derived from grammatical organization or punctuation, and; the number or type of embodiments described in the specification.

As used herein, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a" or "an" element includes aspects having two or more such elements, unless the context clearly dictates otherwise.

As used herein, the brightness of a pixel is the luminous flux emitted by the pixel divided by the area of the pixel per projected solid angle in a given direction.

Although the following exemplary subdisplays described and illustrated herein are square or rectangular in shape, the present disclosure is applicable to subdisplays having any suitable shape (e.g., hexagonal), wherein the subdisplays may be tiled to provide a larger display. Thus, while square or rectangular subdisplays have edges and thus peripheral regions that are orthogonal (i.e., 90 °) to one another (e.g., regions adjacent the edges), subdisplays having other shapes may have edges and thus peripheral regions that intersect at other angles (e.g., 120 ° hexagons). Thus, "orthogonal" perimeter regions and "corner" regions described herein with reference to square or rectangular sub-displays are also applicable to sub-displays having other shapes in which perimeter regions intersect at intersecting (i.e., corner) regions. Referring now to FIG. 1, an exemplary secondary display 100 is depicted. The sub-display 100 includes a central area 102 and first

peripheral areas

122a and 122 b. The central region 102 is located between the first peripheral region 122a and the first peripheral region 122 b. The central region 102 includes an array of pixels 104. In this example, the central region 102 includes a two-dimensional (2D) array of pixels 104. The array of pixels 104 may include any suitable number of rows and columns. Although the central region 102 depicted in fig. 1 includes the same number of rows and columns of pixels 104, in other examples, the central region 102 may include a different number of rows and columns.

Each pixel 104 includes a first region defined by a width indicated at 106 and a length indicated at 108. Each pixel 104 also includes a first light source 110. The first light source 110 of each pixel 104 may be a Light Emitting Diode (LED), such as a micro LED, or other suitable component for generating light. Although each pixel 104 depicted in fig. 1 includes one light source 110, in other examples, each pixel 104 may include two, three, four, or more light sources. In this example, each light source 110 is rectangular in shape. In other examples, each light source 110 may have other suitable shapes, such as square or circular.

The first peripheral region 122a includes a first array of subpixels 124. Each first sub-pixel 124 includes a second region defined by a width indicated at 126 and a length indicated at 128. Each first subpixel 124 also includes a second light source 130. The second light source 130 of each first sub-pixel 124 may be an LED, such as a micro LED, or other suitable component for generating light. Although each first subpixel 124 depicted in fig. 1 includes one light source 130, in other examples, each first subpixel 124 may include two, three, four, or more light sources. In this example, each light source 130 is square. In other examples, each light source 130 may have other suitable shapes, such as a non-square rectangle or a circle. The first peripheral region 122b is similar to the first peripheral region 122a including the first array of sub-pixels 124. In one example, one of the

first perimeter regions

122a, 122b is excluded, such as for a tiled display that includes only two subdisplays in a row (i.e., where the first perimeter region is disposed only on a side of a subdisplay, the perimeter region immediately adjacent to the other subdisplay).

Each second area defined by the width 126 and length 128 of each first sub-pixel 124 is smaller than each first area defined by the width 106 and length 108 of each pixel 104. In the exemplary embodiment shown, the length 128 of each first subpixel 124 is approximately equal to each length 108 of each pixel 104, and the width 126 of each first subpixel 124 is less than the width 106 of each pixel 104. In one example, each second region is approximately half the size of each first region, such that the width 126 of each first sub-pixel 124 is approximately half the width 106 of each pixel 104. Each second light source 130 of the first sub-pixel 124 emits a lower luminous flux than each first light source 110 of the pixel 104. In one example, the brightness of each pixel 104 is approximately equal to the brightness of each first subpixel 124. In another example, each second light source 130 of the first sub-pixel 124 is smaller than each first light source 110 of the pixel 104. In one example, each second light source 130 of the first sub-pixel 124 is approximately half the size of each first light source 110 of the pixel 104. When each second light source 130 is approximately the same size as each first light source 110, each second light source 130 may be driven at a lower current than each first light source 110 to emit a lower luminous flux than each first light source 110. When each second light source 130 is smaller than each first light source 110, each second light source 130 may be driven at the same current as each first light source 110 to emit a lower luminous flux than each first light source 110.

Fig. 2 schematically depicts another example of the sub-display 150. Sub-display 150 includes central region 102 and first

peripheral regions

122a and 122b, as previously described and illustrated with reference to fig. 1. In addition, the sub-display 150 includes second

peripheral areas

152a and 152b and

corner areas

162a, 162b, 162c, and 162 d. The second

peripheral regions

152a and 152b are orthogonal to the first

peripheral regions

122a and 122 b. The corner region 162a is located at the intersection of the first peripheral region 122a and the second peripheral region 152 a. The corner region 162b is located at the intersection of the first peripheral region 122b and the second peripheral region 152 a. The corner region 162c is located at the intersection of the first peripheral region 122b and the second peripheral region 152 b. The corner region 162d is located at the intersection of the first peripheral region 122a and the second peripheral region 152 b.

The second peripheral region 152a includes a second array of subpixels 154. Each second sub-pixel 154 includes a second region defined by a width indicated at 156 and a length indicated at 158. Each second sub-pixel 154 further includes a second light source 130. The second light source 130 of each second sub-pixel 154 may be an LED, such as a micro LED, or other suitable component for generating light. Although each second sub-pixel 154 depicted in fig. 2 includes one light source 130, in other examples, each second sub-pixel 154 may include two, three, four, or more light sources. In this example, each light source 130 is square. In other examples, each light source 130 may have other suitable shapes, such as a non-square rectangle or a circle. The second peripheral region 152b is similar to the second peripheral region 152a including the second array of subpixels 154.

Each second area defined by the width 156 and length 158 of each second sub-pixel 154 is smaller than each first area defined by the width 106 and length 108 of each pixel 104. In this example, the width 156 of each second subpixel 154 is approximately equal to each width 106 of each pixel 104, and the length 158 of each second subpixel 154 is less than the length 108 of each pixel 104. In one example, each second region is approximately half the size of each first region, such that the length 158 of each second sub-pixel 154 is approximately half the length 108 of each pixel 104. Each second light source 130 of the second sub-pixel 154 emits a lower luminous flux than each first light source 110 of the pixel 104. In one example, the brightness of each pixel 104 is approximately equal to the brightness of each second sub-pixel 154. In another example, each second light source 130 of the second sub-pixel 154 is smaller than each first light source 110 of the pixel 104. In one example, each second light source 130 of the second sub-pixel 154 is approximately half the size of each first light source 110 of the pixel 104. Each second light source 130 of the second subpixel 154 may have the same orientation or a different orientation than each second light source 130 of the first subpixel 124.

Each of the

corner regions

162a, 162b, 162c, and 162d includes a third sub-pixel 164. Each third sub-pixel 164 includes a third region defined by a width indicated at 166 and a length indicated at 168. Each third sub-pixel 164 further includes a third light source 170. The third light sources 170 of each third sub-pixel 164 may be LEDs, such as micro-LEDs, or other suitable components for generating light. Although each third sub-pixel 164 depicted in fig. 2 includes one light source 170, in other examples, each third sub-pixel 164 may include two, three, four, or more light sources. In this example, each light source 170 is rectangular. In other examples, each light source 170 may have other suitable shapes, such as circular. In one example, the first perimeter region 122b, the second perimeter region 152b, and the

corner regions

162b, 162c, and 162d are excluded, for example, for a tiled display including four sub-displays arranged in two columns and two rows.

Each third region defined by the width 166 and length 168 of each third sub-pixel 164 is smaller than each first region defined by the width 106 and length 108 of each pixel 104. In this example, a length 168 of each third subpixel 164 is approximately equal to each length 158 of each second subpixel 154, and a width 166 of each third subpixel 164 is approximately equal to the width 126 of each first subpixel 124. In one example, each third region is approximately one-fourth the size of each first region, such that the width 166 of each third subpixel 164 is approximately one-half the width 106 of each pixel 104, and the length 168 of each third subpixel 164 is approximately one-half the length 108 of each pixel 104. Each third light source 170 of the third sub-pixel 164 emits a lower luminous flux than each first light source 110 of the pixel 104 and emits a lower luminous flux than each second light source 130 of the first sub-pixel 124 and the second sub-pixel 154. In one example, the brightness of each pixel 104 is approximately equal to the brightness of each first sub-pixel 124 and the brightness of each second sub-pixel 154 and the brightness of each third sub-pixel 164. In another example, each third light source 170 of the third sub-pixel 164 is smaller than each first light source 110 of the pixel 104 and smaller than each second light source 130 of the first sub-pixel 124 and the second sub-pixel 154. In one example, each third light source 170 of the third subpixel 164 is approximately one-fourth the size of each first light source 110 of the pixel 104 and approximately one-half the size of each second light source 130 of the first subpixel 124 and the second subpixel 154.

Fig. 3 schematically depicts an exemplary tiled display 190. The tiled display 190 includes a first subdisplay 200a and a second subdisplay 200b, collectively subdisplays 200. Although two subdisplays 200 are depicted in fig. 3, tiled display 190 may include any suitable number of subdisplays 200 arranged in a single column, such as three, four, or more subdisplays 200. The first sub-display 200a is adjacent to the second sub-display 200b and a seam 192 is defined between the first sub-display 200a and the second sub-display 200 b.

Each secondary display 200 includes a central area 202 and first

peripheral areas

222a and 222b, collectively referred to as first peripheral areas 222. Each central region 202 is between a first peripheral region 222a and a first peripheral region 222 b. Each central region 202 includes an array of pixels 204. In this example, each central region 202 includes a 2D array of pixels 204. Each array of pixels 204 may include any suitable number of columns and rows. Although each central region 202 depicted in fig. 3 includes the same number of columns and rows of pixels 204, in other examples, each central region 202 may include a different number of columns and rows.

Each pixel 204 includes a

first light source

210a, 210b, 210c, and 210d, collectively referred to as first light sources 210. Each first light source 210 of each pixel 204 may be an LED, such as a micro LED, or other suitable component for generating light. In one example, the first light source 210a may be a first blue light source, such as a first blue micro LED, and the first light source 210b may be a first red light source, such as a first red micro LED. In this example, the first light source 210c may be a green light source, such as a first green micro LED, and the first light source 210d may be a first white light source, such as a first white micro LED. Although the shape of each first light source 210 is rectangular in the example shown in fig. 3, in other examples, each light source 210 may have other suitable shapes, such as circular.

Each first peripheral region 222 includes a first array of subpixels 224. Each of the first sub-pixels 224 includes second

light sources

230a, 230b, 230c and 230d, collectively referred to as second light sources 230. Each second light source 230 of each first sub-pixel 224 may be an LED, such as a micro LED, or other suitable component for generating light. In one example, the second light source 230a may be a second blue light source, e.g., a second blue micro LED, and the second light source 230b may be a second red light source, e.g., a second red micro LED. In this example, the second light source 210c may be a second green light source, such as a second green micro LED, and the second light source 210d may be a second white light source, such as a second white micro LED. Although the shape of each second light source 230 is rectangular in the example shown in fig. 3, in other examples, each light source 230 may have other suitable shapes, such as square or circular. In this example, each second light source 230 is orthogonal to each first light source 210. In other examples, other orientations may be selected.

Each first sub-pixel 224 of each peripheral region 222 emits approximately half the light flux of each pixel 204 of each central region 202. Each second light source 230 of the first sub-pixel 224 emits approximately half the light flux of each first light source 210 of the pixel 204. The peripheral region 222a of the sub-display 200a is adjacent to the peripheral region 222b of the sub-display 200 b. Thus, the first array of sub-pixels 224 of the peripheral region 222a of the first sub-display 200a is adjacent to the first array of sub-pixels 224 of the peripheral region 222b of the second sub-display 200b to provide a first array of seam pixels. Each first seam pixel includes two sub-pixels 224 and is approximately equal in size to each first pixel 204 of each central region 202. The brightness and color of each sub-pixel 224 may be independently controlled to minimize or effectively eliminate the visibility of the seam 192 between the sub-displays 200a and 200 b.

FIG. 4A schematically depicts another example of a tiled display 240. The tiled display 240 includes a first sub-display 250a, a second sub-display 250b, a third sub-display 250c, and a fourth sub-display 250d, collectively sub-displays 250. Although four subdisplays 250 are depicted in fig. 4A, tiled display 240 may include any suitable number of subdisplays 250 arranged in any suitable number of columns and rows. The first sub-display 250a is adjacent to the second sub-display 250b and the third sub-display 250 c. The fourth sub-display 250d is adjacent to the second sub-display 250b and the third sub-display 250 c. First (i.e., vertical) seams 242 are defined between the first and second subdisplays 250a and 250b, and between the third and

fourth subdisplays

250c and 250 d. A second (i.e., horizontal) seam 244 is defined between the first sub-display 250a and the third sub-display 250c, and between the second sub-display 250b and the fourth sub-display 250 d.

Each secondary display 250 includes a central region 202 and a first peripheral region 222, as previously described and illustrated with reference to fig. 3. In addition, each sub-display 250 includes second

peripheral areas

252a and 252b (collectively, second peripheral areas 252) and

corner areas

262a, 262b, 262c, and 262d (collectively, corner areas 262). An enlarged corner area 262 is shown in fig. 4B. Each second peripheral region 252 is orthogonal to each first peripheral region 222. Each corner region 262 is located at the intersection of the first perimeter region 222 and the second perimeter region 252.

Each second peripheral region 252 includes a second array of subpixels 254. Each of the second sub-pixels 254 includes the

second light sources

230a, 230b, 230c, and 230d as previously described. In this example, the second light sources 230 of each second sub-pixel 254 of the second peripheral region 252 are orthogonal to each second light source 230 of each first sub-pixel 224 of the first peripheral region 222. Each second sub-pixel 254 of each second peripheral region 252 is approximately half the size of each pixel 204 of each central region 202.

Each corner region 262 includes a third sub-pixel 264. Each third sub-pixel 264 includes third

light sources

270a, 270b, 270c and 270d, collectively referred to as third light sources 270. Each third light source 270 of each third sub-pixel 264 may be an LED, such as a micro LED, or other suitable component for generating light. In one example, the third light source 270a may be a third blue light source, e.g., a third blue micro LED, and the third light source 270b may be a third red light source, e.g., a third red micro LED. In this example, the third light source 270c may be a third green light source, such as a third green micro LED, and the third light source 270d may be a third white light source, such as a third white micro LED. Although the shape of each third light source 270 is rectangular in the example shown in fig. 4A to 4B, in other examples, each light source 270 may have other suitable shapes, such as circular. In this example, each third light source 270 of each third sub-pixel 264 of each corner region 262 is parallel to each second light source 230 of each second sub-pixel 254 of each second corner region 252. In other examples, other orientations may be selected.

Each third sub-pixel 262 is approximately one-fourth the size of each first pixel 204. Each third light source 270 of the third sub-pixel 264 emits approximately one quarter of the luminous flux of each first light source 210 of the pixel 204 and approximately one half of the luminous flux of each second light source 230 of the first and second sub-pixels 224 and 254. The first perimeter region 222a of the first sub-display 250a is adjacent to the first perimeter region 222b of the second sub-display 250 b. The second peripheral region 252a of the first sub-display 250a is adjacent to the second peripheral region 252b of the third sub-display 250 c. The second peripheral region 252a of the second sub-display 250b is adjacent to the second peripheral region 252b of the fourth sub-display 250 d. The first peripheral region 222a of the third sub-display 250c is adjacent to the first peripheral region 222b of the fourth sub-display 250 d.

Thus, the first array of subpixels 224 of the first peripheral region 222a of the first sub-display 250a is adjacent to the first array of subpixels 224 of the first peripheral region 222b of the second sub-display 250b to provide a first array of seam pixels. Each first seam pixel includes two sub-pixels 224 and is approximately equal in size to each first pixel 204 of each central region 202. The second array of sub-pixels 254 of the second peripheral region 252a of the first sub-display 250a is adjacent to the second array of sub-pixels 254 of the second peripheral region 252b of the third sub-display 250c to provide a second array of seam pixels. Each second seam pixel includes two sub-pixels 254 and is approximately equal in size to each first pixel 204 of each central region 202. The first array of subpixels 224 of the first peripheral region 222a of the third sub-display 250c is adjacent to the first array of subpixels 224 of the fourth peripheral region 222b of the fourth sub-display 250d to provide a third array of seam pixels. Each third seam pixel includes two sub-pixels 224 and is approximately equal in size to each first pixel 204 of each central region 202. The second array of subpixels 254 of the second peripheral region 252a of the second sub-display 250b is adjacent to the second array of subpixels 254 of the second peripheral region 252b of the fourth sub-display 250d to provide a fourth array of seam pixels. Each fourth seam pixel includes two sub-pixels 254 and is approximately equal in size to each first pixel 204 of each central region 202.

The corner area 262d of the first sub-display 250a is adjacent to the corner area 262c of the second sub-display 250 b. Corner area 262b of the first sub-display 250a is adjacent to corner area 262c of the third sub-display 250 c. The corner area 262a of the second sub-display 250b is adjacent to the corner area 262d of the fourth sub-display 250 d. The corner area 262a of the third sub-display 250c is adjacent to the corner area 262b of the fourth sub-display 250 d. The corner area 262a of the first sub-display 250a, the corner area 262b of the second sub-display 250b, the corner area 262d of the third sub-display 250c, and the corner area 262c of the fourth sub-display 250d are adjacent to each other to provide corner seam pixels. The corner seam pixels include four corner sub-pixels 264 and are approximately equal in size to each first pixel 204 of each central region 202. The brightness and color of each first subpixel 224, each second subpixel 254, and each corner subpixel 264 may be independently controlled to minimize or effectively eliminate the visibility of first seam 242 and second seam 244 between subdisplays 250a, 250b, 250c, and 250 d.

Fig. 5 schematically depicts an exemplary seam 300a of a tiled display (e.g., tiled display 190 of fig. 3 or tiled display 240 of fig. 4A). The seam 300a is formed by arranging a perimeter region 302a of the first sub-display adjacent to a perimeter region 302b of the second sub-display. Peripheral region 302a includes an array of sub-pixels 304a, and peripheral region 302b includes an array of sub-pixels 304 b. Each

subpixel

304a and 304b includes a

light source

306a, 306b, 306c, and 306d, collectively referred to as light sources 306. Each light source 306 of each subpixel 304a and 304b may be an LED, such as a micro LED, or other suitable component for generating light. In one example, light source 306a may be a blue light source, such as a blue micro LED, and light source 306b may be a red light source, such as a red micro LED. In this example, light source 306c may be a green light source, such as a green micro LED, and light source 306d may be a white light source, such as a white micro LED. Although the shape of each light source 306 is rectangular in the example shown in fig. 5, in other examples, each light source 306 may have other suitable shapes, such as circular. In this example, the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304a are aligned with the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304b, respectively. The brightness and color of each sub-pixel 304a and 304b may be independently controlled to minimize or effectively eliminate the visibility of the seam 300 a.

Fig. 5 shows an arrangement of light sources in a seam pixel, where the same type of light sources are symmetrical for the seam line. In the following fig. 6 to 10, alternative arrangements of light sources in seam pixels are depicted. In each arrangement, the average brightness and color across the seam pixels may be the same. The spatial brightness and color within the seam pixel may be slightly different. The most suitable arrangement of light sources within the seam pixel may be selected based on the particular application.

Fig. 6 schematically depicts another example of a seam 300b of a tiled display (e.g., tiled display 190 of fig. 3 or tiled display 240 of fig. 4A). The seam 300b is formed by arranging the perimeter region 302a of the first sub-display adjacent to the perimeter region 302b of the second sub-display. Peripheral region 302a includes an array of sub-pixels 304a, and peripheral region 302b includes an array of sub-pixels 304 b. Each

subpixel

304a and 304b includes a

light source

306a, 306b, 306c, and 306d as previously described. In this example, the order of the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304b is reversed relative to the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304 a. Thus, the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304a are aligned with the

light sources

306d, 306c, 306b, and 306a of each sub-pixel 304b, respectively. The brightness and color of each sub-pixel 304a and 304b may be independently controlled to minimize or effectively eliminate the visibility of the seam 300 b.

Fig. 7 schematically depicts another example of a seam 300c of a tiled display (e.g., tiled display 190 of fig. 3 or tiled display 240 of fig. 4A). The seam 300c is formed by arranging the perimeter region 302a of the first sub-display adjacent to the perimeter region 302b of the second sub-display. Peripheral region 302a includes an array of sub-pixels 304a, and peripheral region 302b includes an array of sub-pixels 304 b. Each

subpixel

304a and 304b includes a

light source

306a, 306b, 306c, and 306d as previously described. In this example, each

light source

306a, 306b, 306c, and 306d of each sub-pixel 304a and 304b is arranged at an angle. In one example, each light source is arranged at an angle between 10 degrees and 80 degrees with respect to each light source (not shown) of the central region of each sub-display. The brightness and color of each sub-pixel 304a and 304b may be independently controlled to minimize or effectively eliminate the visibility of the seam 300 c.

Fig. 8 schematically depicts another example of a seam 300d of a tiled display (e.g., tiled display 190 of fig. 3 or tiled display 240 of fig. 4A). The seam 300d is formed by arranging the perimeter region 302a of the first sub-display adjacent to the perimeter region 302b of the second sub-display. Peripheral region 302a includes an array of sub-pixels 304a, and peripheral region 302b includes an array of sub-pixels 304 b. Each

subpixel

304a and 304b includes a

light source

306a, 306b, 306c, and 306d as previously described. In this example, each

light source

306a, 306b, 306c, and 306d of each sub-pixel 304a and 304b is arranged at an angle, and the order of the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304b is reversed relative to the

light sources

306a, 306b, 306c, and 306d of each sub-pixel 304 a. The brightness and color of each sub-pixel 304a and 304b may be independently controlled to minimize or effectively eliminate the visibility of the seam 300 d.

Fig. 9 schematically depicts another example of a seam 300e of a tiled display (e.g., tiled display 190 of fig. 3 or tiled display 240 of fig. 4A). The seam 300e is formed by arranging the perimeter region 302a of the first sub-display adjacent to the perimeter region 302b of the second sub-display. Peripheral region 302a includes an array of sub-pixels 304a, and peripheral region 302b includes an array of sub-pixels 304 b. Each

subpixel

304a and 304b includes a

light source

306a, 306b, 306c, and 306d as previously described. In this example, each

light source

306a, 306b, 306c, and 306d of each sub-pixel 304a and 304b is arranged at an angle that switches between adjacent sub-pixels 304a in the perimeter region 302a and between adjacent sub-pixels 304b in the perimeter region 302 b. Further, the order of

light sources

306a, 306b, 306c, and 306d alternates between adjacent subpixels 304a in the perimeter region 302a and between adjacent subpixels 304b in the perimeter region 302 b. Furthermore, the order of the

light sources

306a, 306b, 306c and 306d of each sub-pixel 304b is reversed with respect to the

light sources

306a, 306b, 306c and 306d of each directly adjacent sub-pixel 304 a. The brightness and color of each sub-pixel 304a and 304b may be independently controlled to minimize or effectively eliminate the visibility of the seam 300 e.

Fig. 10 schematically depicts another example of a seam 300f of a tiled display (e.g., tiled display 190 of fig. 3 or tiled display 240 of fig. 4A). The seam 300f is formed by arranging the perimeter region 302a of the first sub-display adjacent to the perimeter region 302b of the second sub-display. Peripheral region 302a includes an array of sub-pixels 304a, and peripheral region 302b includes an array of sub-pixels 304 b. Each

subpixel

304a and 304b includes a

light source

306a, 306b, 306c, and 306d as previously described. In this example, the arrangement of each

light source

306a, 306b, 306c, and 306d of each sub-pixel 304a varies between adjacent sub-pixels 304a within the perimeter region 302a in a first semi-random pattern. Further, the arrangement of each

light source

306a, 306b, 306c, and 306d of each sub-pixel 304b varies between adjacent sub-pixels 304b within the perimeter region 302b in a second semi-random pattern. Further, the

light sources

306a, 306b, 306c, and 306d within each sub-pixel 304a and 304b may be arranged offset from each other, at an angle, in a different order, and/or combinations thereof to provide a semi-random pattern between immediately adjacent sub-pixels 304a and 304b along the seam 304 f. The brightness and color of each sub-pixel 304a and 304b may be independently controlled to minimize or effectively eliminate the visibility of the seam 300 f.

FIG. 11 is a flow chart illustrating one example of a method 400 for manufacturing a display. At 402, method 400 includes providing a plurality of sub-displays, each sub-display comprising a central region and a peripheral region, the central region comprising a plurality of first pixels, the peripheral region comprising a plurality of first sub-pixels, each first pixel comprising at least one first micro LED, and each first sub-pixel comprising at least one second micro LED, the second micro LED emitting a luminous flux that is lower than the luminous flux emitted by each first micro LED. At 404, the method 400 includes arranging a plurality of sub-displays adjacent to each other such that the first sub-pixel of each sub-display is adjacent to the first sub-pixel of an adjacent sub-display to provide a plurality of seam pixels extending between the adjacent sub-displays.

In one example, the plurality of sub-displays are arranged such that each seam pixel includes an area equal to an area (area) of each first pixel. The peripheral region of each sub-display may further comprise corner sub-pixels. Each corner sub-pixel includes at least one third micro LED that emits a luminous flux lower than that of each second micro LED. In this case, the method 400 may further include arranging the plurality of sub-displays adjacent to each other such that the corner sub-pixels of each sub-display are directly adjacent to the corner sub-pixels of three adjacent sub-displays to provide corner pixels extending between the adjacent sub-displays. The plurality of sub-displays may be arranged such that each corner pixel includes an area equal to an area of each first pixel.

It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present disclosure without departing from the spirit and scope of the disclosure. Thus, it is intended that the present disclosure cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A secondary display for a tiled display (tiled display), the secondary display comprising:

a central region comprising an array of pixels, each pixel comprising a first region and at least one first light source; and

a first peripheral region comprising an array of first sub-pixels, each first sub-pixel comprising a second region and at least one second light source,

each second area is smaller than each first area, and each second light source emits a lower luminous flux than each first light source.

2. The secondary display of claim 1, wherein each second area is half the size of each first area, and

the brightness of each pixel of the central region is equal to the brightness of each first sub-pixel.

3. The secondary display of any of claims 1-2, wherein each second region is half the size of each first region, and

wherein each second light source is half the size of each first light source.

4. The sub-display of any of claims 1-3, wherein each of the first light sources comprises a first micro LED, and

each of the second light sources includes a second micro LED.

5. The sub-display of claim 4, wherein each pixel comprises a first red micro LED, a first green micro LED, and a first blue micro LED, and

each first sub-pixel includes a second red micro LED, a second green micro LED, and a second blue micro LED.

6. The sub-display of claim 5, wherein each pixel comprises a first white micro LED, and

each first sub-pixel includes a second white micro LED.

7. The sub-display of claim 5, wherein the second red, second green, and second blue micro-LEDs of each first sub-pixel are offset with respect to each other.

8. The sub-display of any one of claims 1 to 7, wherein each second light source is orthogonal to each first light source.

9. The secondary display of any one of claims 1-7 wherein each second light source is arranged at an angle of between 10 degrees and 80 degrees relative to each first light source.

10. The sub-display of any one of claims 1 to 9, further comprising:

a second peripheral region comprising a second array of sub-pixels, each second sub-pixel comprising a second region and at least one second light source,

and the second array of subpixels is orthogonal to the first array of subpixels.

11. The sub-display of claim 10, further comprising:

a corner region including a third sub-pixel including a third region and at least one third light source,

the third area is smaller than each second area, and the third light source emits a lower luminous flux than each second light source.

12. The secondary display of claim 11, wherein the third area is one-fourth the size of each first area, and

the brightness of each pixel of the central region is equal to the brightness of each third sub-pixel.

13. The secondary display of any of claims 11-12, wherein the third area is one-fourth the size of each first area, and

the third light sources are one-fourth the size of each first light source.

14. A tiled display comprising:

a first sub-display and a second sub-display, the second sub-display being adjacent to the first sub-display,

each of the first and second sub-displays comprising:

a central region comprising an array of first pixels, each first pixel comprising at least one first light source; and

a first peripheral region comprising an array of first sub-pixels, each first sub-pixel comprising at least one second light source,

wherein each of the first sub-pixels is smaller than a size of each of the first pixels, and

the first subpixel array of the first sub-display is adjacent to the first subpixel array of the second sub-display to provide a first seam pixel array.

15. The tiled display of claim 14, wherein each sub-display further comprises:

a second peripheral region comprising a second array of subpixels; and

corner subpixels at an intersection of the first and second subpixel arrays,

wherein the corner sub-pixels are smaller than a size of each of the first sub-pixels.

16. The tiled display of claim 15 wherein each of the first sub-pixels is half the size of each of the first pixels and the corner sub-pixels are one quarter the size of each of the first pixels.

17. The tiled display according to any of claims 15 to 16, further comprising:

a third sub-display adjacent to the first sub-display,

the second array of subpixels of the first sub-display is adjacent to the second array of subpixels of the third sub-display to provide a second array of seam pixels.

18. The tiled display of claim 17, further comprising:

a fourth sub-display adjacent to the second sub-display and the third sub-display,

the first array of subpixels of the third sub-display is adjacent to the first array of subpixels of the fourth sub-display to provide a third array of seam pixels,

the second array of subpixels of the second sub-display is adjacent to the second array of subpixels of the fourth sub-display to provide a fourth array of seam pixels, an

Wherein the corner-falling sub-pixel of the first sub-display, the corner-falling sub-pixel of the second sub-display, the corner-falling sub-pixel of the third sub-display, and the corner-falling sub-pixel of the fourth sub-display are adjacent to each other to provide a corner seam pixel.

19. The tiled display of claim 14 wherein each first sub-pixel of the first sub-display comprises a plurality of micro-LEDs arranged in a first configuration, and

each first sub-pixel of the second sub-display comprises a plurality of micro-LEDs arranged in a second configuration different from the first configuration.

20. A method for manufacturing a display, the method comprising the steps of:

providing a plurality of sub-displays, each sub-display comprising a central region and a peripheral region, the central region comprising a plurality of first pixels, the peripheral region comprising a plurality of first sub-pixels, each first pixel comprising at least one first micro LED, and each first sub-pixel comprising at least one second micro LED configured to emit a lower luminous flux than each first micro LED; and

the plurality of sub-displays are arranged adjacent to each other such that the first sub-pixel of each sub-display is adjacent to the first sub-pixel of an adjacent sub-display to provide a plurality of seam pixels extending between the adjacent sub-displays.

21. The method of claim 20, wherein the plurality of sub-displays are arranged such that each seam pixel comprises an area equal to an area of each first pixel.

22. The method of any one of claims 20-21, wherein the perimeter region of each sub-display further comprises corner sub-pixels, each corner sub-pixel comprising at least one third micro LED configured to emit a lower luminous flux than each second micro LED, the method further comprising the steps of:

arranging the plurality of sub-displays adjacent to each other such that the corner sub-pixels of each sub-display are directly adjacent to the corner sub-pixels of three adjacent sub-displays to provide corner pixels extending between adjacent sub-displays.

23. The method of claim 22, wherein the plurality of sub-displays are arranged such that each corner pixel comprises an area equal to an area of each first pixel.