Patent
US 11,067,879ULTRA-DENSE LED PROJECTOR USING THINNED GALLIUM NITRIDE
Kwong-Hin Henry Choy, Paul Scott Martin
US
Copyright © 2026 Matter42. All rights reserved.
Patent
Atlas literature
Patent
US 11,067,879Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um, wherein the individual LED pillars form at least a 200x200 array of color pixels. Currently amended
The display device of claim 1 wherein the individual LED pillars produce blue light, and the display device further comprises: a first color conversion material on top of a first subset of the individual LED pillars, the first color conversion material converting the blue light produced by the first subset of individual LED pillars to green light; and a second color conversion material on top of a second subset of the individual LED pillars, the second color conversion material converting the blue light produced by the second subset of individual LED pillars to red light. Original
The display device of claim 1 wherein adjacent individual LED pillars are separated by trenches that have a width of not more than 0.5 um. Original
The display device of claim 1 wherein sidewalls of the individual LED pillars are passivated, and the display device further comprises: electrical contacts to top contacts of the individual LED pillars. Original
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a multi-layer dielectric stack on top of at least some of the individual LED pillars, the multi-layer dielectric stack providing wavelength selectivity. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Currently amended
The display device of claim 3 wherein the color conversion material comprises quantum dots. Original
The display device of claim 3 wherein the color conversion material comprises individual pillars of color conversion material on top of the individual LED pillars. Original
Canceled
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein the display device is sufficiently small to fit into a contact lens. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein thinning the gallium nitride region reduces a ratio of the height to the width to less than 5:1. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a metal layer to metal layer bond attaching the frontplane die to the backplane die. Currently amended
The display device of claim 11 wherein the bond uses a bonding agent selected from aluminum; indium tin oxide; aluminum-doped zin c oxide; aluminum with a surface coating of silicon, germanium or titanium; Sn solder and In solder. Original
The display device of claim 11 wherein the backplane substrate is a silicon substrate, the LED driver circuits are CMOS circuits, and the metal layer on the backplane substrate is a copper layer. Original
An eye-mounted display comprising: a contact lens containing a femtoprojector display, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; wherein the individual LED pillars form at least a 200x200 array of color pixels, and an optical system that projects the light from the array of individual LED pillars onto a user's retina. Currently amended
The eye-mounted display of claim 17 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
A display system comprising: eyewear containing a femtoprojector display that is not larger than 2 mm x 2 mm x 2 mm, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; and an optical system that projects an image from the light from the array of individual LED pillars. Original
The display system of claim 19 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
Layer stacks claimed or described, ordered top of device to substrate.
femtoprojector display device (200x200 color pixel array)
display device with multi-layer dielectric wavelength-selective stack
Materials described outside the worked examples.
gallium nitride
GaN
InGaN quantum wells
InGaN
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0.5–1 mm | — |
Thickness | 4–6 um |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,067,879Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um, wherein the individual LED pillars form at least a 200x200 array of color pixels. Currently amended
The display device of claim 1 wherein the individual LED pillars produce blue light, and the display device further comprises: a first color conversion material on top of a first subset of the individual LED pillars, the first color conversion material converting the blue light produced by the first subset of individual LED pillars to green light; and a second color conversion material on top of a second subset of the individual LED pillars, the second color conversion material converting the blue light produced by the second subset of individual LED pillars to red light. Original
The display device of claim 1 wherein adjacent individual LED pillars are separated by trenches that have a width of not more than 0.5 um. Original
The display device of claim 1 wherein sidewalls of the individual LED pillars are passivated, and the display device further comprises: electrical contacts to top contacts of the individual LED pillars. Original
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a multi-layer dielectric stack on top of at least some of the individual LED pillars, the multi-layer dielectric stack providing wavelength selectivity. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Currently amended
The display device of claim 3 wherein the color conversion material comprises quantum dots. Original
The display device of claim 3 wherein the color conversion material comprises individual pillars of color conversion material on top of the individual LED pillars. Original
Canceled
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein the display device is sufficiently small to fit into a contact lens. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein thinning the gallium nitride region reduces a ratio of the height to the width to less than 5:1. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a metal layer to metal layer bond attaching the frontplane die to the backplane die. Currently amended
The display device of claim 11 wherein the bond uses a bonding agent selected from aluminum; indium tin oxide; aluminum-doped zin c oxide; aluminum with a surface coating of silicon, germanium or titanium; Sn solder and In solder. Original
The display device of claim 11 wherein the backplane substrate is a silicon substrate, the LED driver circuits are CMOS circuits, and the metal layer on the backplane substrate is a copper layer. Original
An eye-mounted display comprising: a contact lens containing a femtoprojector display, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; wherein the individual LED pillars form at least a 200x200 array of color pixels, and an optical system that projects the light from the array of individual LED pillars onto a user's retina. Currently amended
The eye-mounted display of claim 17 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
A display system comprising: eyewear containing a femtoprojector display that is not larger than 2 mm x 2 mm x 2 mm, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; and an optical system that projects an image from the light from the array of individual LED pillars. Original
The display system of claim 19 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
Layer stacks claimed or described, ordered top of device to substrate.
femtoprojector display device (200x200 color pixel array)
display device with multi-layer dielectric wavelength-selective stack
Materials described outside the worked examples.
gallium nitride
GaN
InGaN quantum wells
InGaN
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0.5–1 mm | — |
Thickness | 4–6 um |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,067,879Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um, wherein the individual LED pillars form at least a 200x200 array of color pixels. Currently amended
The display device of claim 1 wherein the individual LED pillars produce blue light, and the display device further comprises: a first color conversion material on top of a first subset of the individual LED pillars, the first color conversion material converting the blue light produced by the first subset of individual LED pillars to green light; and a second color conversion material on top of a second subset of the individual LED pillars, the second color conversion material converting the blue light produced by the second subset of individual LED pillars to red light. Original
The display device of claim 1 wherein adjacent individual LED pillars are separated by trenches that have a width of not more than 0.5 um. Original
The display device of claim 1 wherein sidewalls of the individual LED pillars are passivated, and the display device further comprises: electrical contacts to top contacts of the individual LED pillars. Original
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a multi-layer dielectric stack on top of at least some of the individual LED pillars, the multi-layer dielectric stack providing wavelength selectivity. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Currently amended
The display device of claim 3 wherein the color conversion material comprises quantum dots. Original
The display device of claim 3 wherein the color conversion material comprises individual pillars of color conversion material on top of the individual LED pillars. Original
Canceled
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein the display device is sufficiently small to fit into a contact lens. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein thinning the gallium nitride region reduces a ratio of the height to the width to less than 5:1. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a metal layer to metal layer bond attaching the frontplane die to the backplane die. Currently amended
The display device of claim 11 wherein the bond uses a bonding agent selected from aluminum; indium tin oxide; aluminum-doped zin c oxide; aluminum with a surface coating of silicon, germanium or titanium; Sn solder and In solder. Original
The display device of claim 11 wherein the backplane substrate is a silicon substrate, the LED driver circuits are CMOS circuits, and the metal layer on the backplane substrate is a copper layer. Original
An eye-mounted display comprising: a contact lens containing a femtoprojector display, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; wherein the individual LED pillars form at least a 200x200 array of color pixels, and an optical system that projects the light from the array of individual LED pillars onto a user's retina. Currently amended
The eye-mounted display of claim 17 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
A display system comprising: eyewear containing a femtoprojector display that is not larger than 2 mm x 2 mm x 2 mm, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; and an optical system that projects an image from the light from the array of individual LED pillars. Original
The display system of claim 19 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
Layer stacks claimed or described, ordered top of device to substrate.
femtoprojector display device (200x200 color pixel array)
display device with multi-layer dielectric wavelength-selective stack
Materials described outside the worked examples.
gallium nitride
GaN
InGaN quantum wells
InGaN
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0.5–1 mm | — |
Thickness | 4–6 um |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 11,067,879Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um, wherein the individual LED pillars form at least a 200x200 array of color pixels. Currently amended
The display device of claim 1 wherein the individual LED pillars produce blue light, and the display device further comprises: a first color conversion material on top of a first subset of the individual LED pillars, the first color conversion material converting the blue light produced by the first subset of individual LED pillars to green light; and a second color conversion material on top of a second subset of the individual LED pillars, the second color conversion material converting the blue light produced by the second subset of individual LED pillars to red light. Original
The display device of claim 1 wherein adjacent individual LED pillars are separated by trenches that have a width of not more than 0.5 um. Original
The display device of claim 1 wherein sidewalls of the individual LED pillars are passivated, and the display device further comprises: electrical contacts to top contacts of the individual LED pillars. Original
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a multi-layer dielectric stack on top of at least some of the individual LED pillars, the multi-layer dielectric stack providing wavelength selectivity. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Currently amended
The display device of claim 3 wherein the color conversion material comprises quantum dots. Original
The display device of claim 3 wherein the color conversion material comprises individual pillars of color conversion material on top of the individual LED pillars. Original
Canceled
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein the display device is sufficiently small to fit into a contact lens. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and wherein thinning the gallium nitride region reduces a ratio of the height to the width to less than 5:1. Currently amended
A display device comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate; a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; and a metal layer to metal layer bond attaching the frontplane die to the backplane die. Currently amended
The display device of claim 11 wherein the bond uses a bonding agent selected from aluminum; indium tin oxide; aluminum-doped zin c oxide; aluminum with a surface coating of silicon, germanium or titanium; Sn solder and In solder. Original
The display device of claim 11 wherein the backplane substrate is a silicon substrate, the LED driver circuits are CMOS circuits, and the metal layer on the backplane substrate is a copper layer. Original
An eye-mounted display comprising: a contact lens containing a femtoprojector display, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; wherein the individual LED pillars form at least a 200x200 array of color pixels, and an optical system that projects the light from the array of individual LED pillars onto a user's retina. Currently amended
The eye-mounted display of claim 17 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
A display system comprising: eyewear containing a femtoprojector display that is not larger than 2 mm x 2 mm x 2 mm, the femtoprojector display comprising: a backplane die comprising an array of LED driver circuits on a backplane substrate, the backplane die receiving data and converting the data into drive currents; and a frontplane structure attached to the backplane die, the frontplane structure comprising a thinned gallium nitride region patterned into an array of individual LED pillars having an active region of width not more than 2um, wherein the gallium nitride region is thinned to reduce a height of the individual LED pillars as measured from the active region to a top of the gallium nitride region to less than 3um; the individual LED pillars driven by the drive currents to produce light; and an optical system that projects an image from the light from the array of individual LED pillars. Original
The display system of claim 19 wherein the femtoprojector display is a color display, and the femtoprojector display further comprises: color conversion material on top of at least some of the individual LED pillars, the color conversion material converting light produced by the individual LED pillars to a different wavelength. Original
Layer stacks claimed or described, ordered top of device to substrate.
femtoprojector display device (200x200 color pixel array)
display device with multi-layer dielectric wavelength-selective stack
Materials described outside the worked examples.
gallium nitride
GaN
InGaN quantum wells
InGaN
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Thickness | 0.5–1 mm | — |
Thickness | 4–6 um |
Related documents with shared materials, methods, properties, or citations.
display device with color conversion material on LED pillars
display device with metal-to-metal bonded frontplane and backplane
eye-mounted femtoprojector display in contact lens
eyewear femtoprojector display system (≤2 mm x 2 mm x 2 mm)
multi-layer dielectric stack
color conversion material
quantum dots
aluminum
Al
indium tin oxide
ITO
aluminum-doped zinc oxide
AZO
aluminum with surface coating of silicon, germanium or titanium
Sn solder
Sn
In solder
In
silicon
Si
copper
Cu
transparent conductive oxide (TCO)
phosphor
sapphire
Al₂O₃
| — |
Thickness | 0.2–0.3 um | — |
Thickness | 2–4 um | — |
Thickness | 1–3 um | — |
Thickness | ≤ 2 um | — |
Thickness | ≤ 1 mm | — |
Thickness | ≥ 2 um | — |
Thickness | ≥ 3 um | — |
Thickness | ≤ 3 um | — |
Thickness | ≥ 0.5 um | — |
display device with color conversion material on LED pillars
display device with metal-to-metal bonded frontplane and backplane
eye-mounted femtoprojector display in contact lens
eyewear femtoprojector display system (≤2 mm x 2 mm x 2 mm)
multi-layer dielectric stack
color conversion material
quantum dots
aluminum
Al
indium tin oxide
ITO
aluminum-doped zinc oxide
AZO
aluminum with surface coating of silicon, germanium or titanium
Sn solder
Sn
In solder
In
silicon
Si
copper
Cu
transparent conductive oxide (TCO)
phosphor
sapphire
Al₂O₃
| — |
Thickness | 0.2–0.3 um | — |
Thickness | 2–4 um | — |
Thickness | 1–3 um | — |
Thickness | ≤ 2 um | — |
Thickness | ≤ 1 mm | — |
Thickness | ≥ 2 um | — |
Thickness | ≥ 3 um | — |
Thickness | ≤ 3 um | — |
Thickness | ≥ 0.5 um | — |
display device with color conversion material on LED pillars
display device with metal-to-metal bonded frontplane and backplane
eye-mounted femtoprojector display in contact lens
eyewear femtoprojector display system (≤2 mm x 2 mm x 2 mm)
multi-layer dielectric stack
color conversion material
quantum dots
aluminum
Al
indium tin oxide
ITO
aluminum-doped zinc oxide
AZO
aluminum with surface coating of silicon, germanium or titanium
Sn solder
Sn
In solder
In
silicon
Si
copper
Cu
transparent conductive oxide (TCO)
phosphor
sapphire
Al₂O₃
| — |
Thickness | 0.2–0.3 um | — |
Thickness | 2–4 um | — |
Thickness | 1–3 um | — |
Thickness | ≤ 2 um | — |
Thickness | ≤ 1 mm | — |
Thickness | ≥ 2 um | — |
Thickness | ≥ 3 um | — |
Thickness | ≤ 3 um | — |
Thickness | ≥ 0.5 um | — |
display device with color conversion material on LED pillars
display device with metal-to-metal bonded frontplane and backplane
eye-mounted femtoprojector display in contact lens
eyewear femtoprojector display system (≤2 mm x 2 mm x 2 mm)
multi-layer dielectric stack
color conversion material
quantum dots
aluminum
Al
indium tin oxide
ITO
aluminum-doped zinc oxide
AZO
aluminum with surface coating of silicon, germanium or titanium
Sn solder
Sn
In solder
In
silicon
Si
copper
Cu
transparent conductive oxide (TCO)
phosphor
sapphire
Al₂O₃
| — |
Thickness | 0.2–0.3 um | — |
Thickness | 2–4 um | — |
Thickness | 1–3 um | — |
Thickness | ≤ 2 um | — |
Thickness | ≤ 1 mm | — |
Thickness | ≥ 2 um | — |
Thickness | ≥ 3 um | — |
Thickness | ≤ 3 um | — |
Thickness | ≥ 0.5 um | — |