Display with fused LEDs
View Patent ↗A display having fused light-emitting diodes (LEDs) includes a display substrate and an array of pixel components disposed on the display substrate. Each pixel component comprises a light-emitting diode and an electrical fuse electrically connected in series with the light-emitting diode. The micro-transfer printable pixel components include an LED having first and second LED electrical contacts for providing power to the LED to cause the LED to emit light, a fuse having first and second fuse electrical contacts, the first fuse electrical contact electrically connected in series with the first LED electrical contact, a first electrode connected to the second fuse electrical contact, and a second electrode connected to the second LED electrical contact.
1. A display having fused light-emitting diodes (LEDs), comprising:
a display substrate; and
an array of pixel components disposed on, over, or in the display substrate, each pixel component comprising:
a plurality of light-emitting diodes electrically connected in parallel, and
a common electrical fuse electrically connected in series with all of the plurality of light-emitting diodes,
wherein the common electrical fuse is an electrically conductive, sacrificial, low-resistance resistor that becomes permanently non-conductive when a pre-determined current passes through the common electrical fuse.
2. The display of claim 1 , wherein each pixel component comprises a red LED that emits red light, a green LED that emits green light, and a blue LED that emits blue light, and wherein the red, green, and blue LEDs are electrically connected to a common electrical connection.
3. The display of claim 1 , comprising a fuse controller that provides sufficient electrical power to render each fuse non-conductive.
4. The display of claim 3 , wherein the fuse controller provides electrical power to the LEDS in a forward-biased direction.
5. The display of claim 3 , wherein the fuse controller provides electrical power to the LEDS in a reverse-biased direction.
6. The display of claim 3 , wherein the fuse controller provides image control signals that cause the array of LEDs to display an image and fuse control signals that can render each fuse non-conductive.
7. The display of claim 3 , wherein the fuse controller is a passive-matrix controller.
8. The display of claim 3 , wherein the fuse controller is an active-matrix controller and wherein each pixel component comprises a pixel controller electrically connected to the LED, the pixel controller comprising circuitry that, in combination with the fuse controller, provides sufficient electrical power to render each fuse non-conductive.
9. The display of claim 1 , wherein one or more of the fuses comprises separate conductors connected in parallel.
10. The display of claim 1 , wherein each pixel component comprises a pixel substrate separate, independent, distinct from the display substrate and the pixel substrates are disposed on the display substrate.
11. The display of claim 1 , wherein the fuses, the LEDs, or the pixel components are provided in a micro-transfer printable component.
12. The display of claim 1 , wherein each pixel component is provided in a micro-transfer printable component and either or both of the fuses and the LEDs are provided in a micro-transfer printable component.
13. A method of operating a display having fused light-emitting diodes, comprising:
providing a display, the display comprising a display substrate and an array of pixel components disposed on, over, or in the display substrate, each pixel component comprising a plurality of light-emitting diodes (LEDs) electrically connected in parallel and a common electrical fuse electrically connected in series with all of the plurality of LEDs;
operating the display to determine an operational status of the plurality of LEDs in each pixel component;
determining one or more LEDs in the array of pixel components that have an electrical short; and
providing an electrical current through the shorted one or more LEDs and through each common electrical fuse electrically connected in series to at least one of the shorted one or more LEDs that renders each common electrical fuse electrically connected in series to the at least one of the shorted one or more LEDs non-conductive,
wherein the common electrical fuse is an electrically conductive, sacrificial, low-resistance resistor that becomes permanently non-conductive when a pre-determined current passes through the common electrical fuse.