IP Library Granted Patent US 10,917,953
Granted Patent B2
US 10,917,953 · App. 15/704,630 · Granted Feb 9, 2021

Electrically parallel fused LEDs

Inventors: Matthew Meitl (Durham, NC); Ronald S. Cok (Rochester, NY); Christopher Bower (Raleigh, NC)
Assignee: X Display Company Technology Limited
H05B45/50H01L22/24H01L23/52H01L27/0288H01L27/153H01L33/62G09G3/3406G09G2300/0426G09G2330/045G09G2330/08H01L2933/0066
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 10,917,953
App. No.
15/704,630
Granted
Feb 9, 2021
Kind
B2
Abstract

An LED component comprises a plurality of fused light-emitting diodes (LEDs) (e.g., micro-transfer printable or micro-transfer printed LEDs). Each fused LED comprises an LED with first and second LED electrical connections for providing power to the LED and a fuse with first and second fuse electrical connections. The first LED electrical connection is electrically connected to the first electrode. The first fuse electrical connection is electrically connected to the second LED electrical connection and the second fuse electrical connection is electrically connected to the second electrode. A fused LED source wafer comprises an LED wafer having a patterned sacrificial layer forming an array of sacrificial portions separated by anchors and a plurality of fused LED components, each fused LED component disposed entirely on or over a corresponding sacrificial portion. A light-emission system comprises a system substrate and a plurality of fused LED components disposed on or over the system substrate.

Claims (44)

1. A fused light-emitting diode (LED) component, comprising:

a first electrode and a second electrode; and

a plurality of fused LEDs, each fused LED comprising:

an LED comprising a first LED electrical connection and a second LED electrical connection for providing power to the LED to cause the LED to emit light, wherein the first LED electrical connection is electrically connected to the first electrode, and

a fuse comprising a first fuse electrical connection and a second fuse electrical connection, the first fuse electrical connection electrically connected to the second LED electrical connection and the second fuse electrical connection electrically connected to the second electrode,

wherein the plurality of fused LEDs are electrically connected in parallel,

wherein the LED of each of the plurality of fused LEDs is a first LED and one or more of the plurality of fused LEDs each comprises a second LED comprising a first LED electrical connection and a second LED electrical connection for providing power to the second LED to cause the second LED to emit light, and

wherein, for each fused LED of the one or more of the plurality of fused LEDs, tithe first LED electrical connection of the first LED is electrically connected in common with the first electrical connection of the second LED, (ii) [[and ]]the second LED electrical connection of the first LED is electrically connected in common with the second LED electrical connection of the second LED so that the first LED and the second LED of the fused LED are electrically connected in parallel, and (iii) all of the current that passes through the first LED and all of the current that passes through the second LED passes through the fuse of the fused LED.

2. The fused LED component of claim 1 , wherein the LEDs all emit substantially the same color of light.

3. The fused LED component of claim 1 , wherein a combination of the LEDs together emit light that is perceived by a human visual system as white light.

4. The fused LED component of claim 1 , wherein at least one of the one or more of the fused LEDs comprises a third LED comprising a first LED electrical connection and a second LED electrical connection for providing power to the third LED to cause the third LED to emit light,

wherein, for each of the at least one of the one or more of the plurality of fused LEDs, the first LED electrical connection of the first LED is electrically connected in common with the first electrical connection of the third LED and the second LED electrical connection of the first LED is electrically connected in common with the second LED electrical connection of the third LED so that the first, second, and third LEDs are electrically connected in parallel.

5. The fused LED component of claim 1 , wherein the first electrode and the second electrode are disposed at least partially on a system substrate, and the fused LED component comprises one or more component substrates different from the system substrate on which one or more of the plurality of fused LEDs and at least a portion of the first electrode and at least a portion of the second electrode are disposed.

6. The fused LED component of claim 5 , wherein at least one of the one or more component substrates comprises a first connection post and a second connection post and at least one of (i) the first connection post is electrically connected to the first electrode, (ii) the second connection post is electrically connected to the second electrode, and (iii) the first connection post and the second connection post each have a peak area smaller than a base area.

7. The fused LED component of claim 1 , wherein one or more of the plurality of fused LEDs comprises an electrical jumper comprising a first connection post and a second connection post each having a peak area less than a base area that electrically connects the first fuse electrical connection and the second fuse electrical connections.

8. The fused LED component of claim 5 , comprising a component substrate on which the plurality of fused LEDs and at least a portion of the first and second electrodes are disposed.

9. A method of making a fused LED component, comprising:

providing the fused LED component on a component substrate, wherein the fused LED component comprises:

a first electrode and a second electrode; and

a plurality of fused LEDs, each fused LED comprising:

an LED comprising a first LED electrical connection and a second LED electrical connection for providing power to the LED to cause the LED to emit light, wherein the first LED electrical connection electrically connected to the first electrode, and

a fuse comprising a first fuse electrical connection and a second fuse electrical connection, the first fuse electrical connection electrically connected to the second LED electrical connection and the second fuse electrical connection electrically connected to the second electrode,

providing a replacement fused LED on the component substrate, wherein the replacement fused LED comprises (i) a replacement LED comprising a first replacement LED electrical connection and a second replacement LED electrical connection and (ii) a replacement fuse comprising a first replacement fuse electrical connection and a second replacement fuse electrical connection; and

electrically connecting the first replacement LED electrical connection of the replacement LED to the first LED electrical connection of a defective LED and the second replacement LED electrical connection of the replacement LED to the first replacement fuse electrical connection of the replacement fuse,

wherein the plurality of fused LEDs are electrically connected in parallel,

wherein at least one of the LEDs in the fused LED component is a defective LED that is electrically shorted; and

applying electrical power to the first and second electrodes so that each fuse associated with the at least one of the LEDs that is a defective LED is rendered non-conductive.

10. The method of claim 9 , comprising:

providing an electrical jumper comprising a first connection post and a second connection post each having a peak area less than a base area for each non-defective LED in the fused LED component; and

disposing each electrical jumper in electrical contact with the second electrode and the second electrical connection of each fused LED in the fused LED component.

11. The method of claim 9 , comprising:

providing a light emission standard;

testing the light output of each LED;

comparing the light output to the light-emission standard;

determining if each LED in the LED component meets the standard; and

for each LED that does not meet the standard, rendering non-conductive at least one of (i) the first and second LED electrical connection of the LED and (ii) the first and second fuse electrical connection of the fuse corresponding to the LED.

12. A fused light-emitting diode (LED) component, comprising:

a first electrode and a second electrode; and

a plurality of fused LEDs, each fused LED comprising:

an LED comprising a first LED electrical connection and a second LED electrical connection for providing power to the LED to cause the LED to emit light, wherein the first LED electrical connection is electrically connected to the first electrode, and

a fuse comprising a first fuse electrical connection and a second fuse electrical connection, the first fuse electrical connection electrically connected to the second LED electrical connection and the second fuse electrical connection electrically connected to the second electrode,

wherein the plurality of fused LEDs are electrically connected in parallel,

wherein the LED of each of the plurality of fused LEDs is a first LED and one or more of the plurality of fused LEDs comprises a second LED comprising a first LED electrical connection and a second LED electrical connection for providing power to the second LED to cause the second LED to emit light,

wherein, for each fused LED of the one or more of the plurality of fused LEDs, (i) the second LED electrical connection of the first LED is electrically connected to the first LED electrical connection of the second LED so that the first LED and the second LED of the fused LED are electrically connected in series and (ii) all of the current that passes through the first LED and all of the current that passes through the second LED passes through the fuse of the fused LED.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 28, 2026
From: X DISPLAY COMPANY TECHNOLOGY LIMITED
To: DAKTRONICS, INC.
Reel/Frame 075482/0209 →
CHANGE OF NAME Recorded Sep 15, 2021
From: X-CELEPRINT LIMITED
To: X DISPLAY COMPANY TECHNOLOGY LIMITED
Reel/Frame 057494/0631 →
CHANGE OF NAME Recorded May 11, 2020
From: X-CELEPRINT LIMITED
To: X DISPLAY COMPANY TECHNOLOGY LIMITED
Reel/Frame 052631/0800 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 9, 2017
From: MEITL, MATTHEW; COK, RONALD S.; BOWER, CHRISTOPHER
To: X-CELEPRINT LIMITED
Reel/Frame 044084/0120 →
Continuity (4)
Continuation In Part 15438319 · Feb 21, 2017
Provisional Application 62311288 · Mar 21, 2016
Provisional Application 62395001 · Sep 15, 2016
Related Publication 20180007750A1 · Jan 4, 2018