Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(20), P. 1624 - 1624
Published: Oct. 10, 2024
Naked-eye
3D
micro-LED
display
combines
the
characteristics
of
with
advantages
micro-LED.
However,
is
still
at
conceptual
stage,
limited
by
its
intrinsic
emission
properties
large
divergence
angle
and
non-coherence,
as
well
difficulties
in
achieving
viewing
angles
high
luminous
efficiency.
In
this
work,
we
propose
a
double-layer
metasurface
film
integrating
functions
collimation
multiple
deflections,
constituting
naked-eye
system.
The
system
characterized
through
numerical
simulations
using
finite-difference
time-domain
method.
simulation
results
show
that
restricts
90%
emitted
light
to
vicinity
0°
angle,
improving
spatial
coherence.
Subsequently,
large-angle,
low-crosstalk
outgoing
from
-45°
45°
achieved,
while
providing
deflection
efficiency
over
80%
pixel
density
up
605.
We
believe
design
provides
feasible
approach
for
realizing
displays
field
view,
low
crosstalk,
resolution.
Abstract
Wide
field
of
view
and
light
weight
optics
are
critical
for
advanced
eyewear,
with
applications
in
augmented/virtual
reality
night
vision.
Conventional
refractive
lenses
often
stacked
to
correct
aberrations
at
a
wide
view,
leading
limited
performance
increased
size
weight.
In
particular,
simultaneously
achieving
large
aperture
collection
is
desirable
but
challenging
realize
compact
form-factor.
Here,
we
demonstrate
(greater
than
60
∘
)
meta-optic
doublet
eyepiece
an
entrance
2.1
cm.
At
the
design
wavelength
633
nm,
achieves
comparable
lens-based
system.
This
meta-doublet
illustrates
potential
meta-optics
play
important
role
development
high-quality
monochrome
near-eye
displays
vision
systems.
Abstract
Retinal
projection
display
enables
the
direct
of
virtual
images
onto
retina
through
pupil
center
via
a
engine,
showing
promise
in
addressing
vergence‐accommodation
conflict
augmented
reality
near‐eye
displays.
However,
existing
RPD
architectures
universally
employ
passive
luminous
micro‐electromechanical
systems
or
spatial
light
modulators,
encountering
challenges
associated
with
beam
aperture
limitations
and
structural
inflexibility.
In
response
to
these,
this
paper
presents
novel
micro‐LED
retinal
architecture
that
integrates
active
full‐color
micro‐LEDs
pixel‐to‐pixel
imaging
fiber
bundle,
effectively
subverting
conventional
designs.
Additionally,
flexible
bundle
brings
an
adaptable
design
optoelectronic
separation
capabilities.
The
principles
feasibility
are
thoroughly
described
validated
simulations
experiments.
A
µRPD
prototype
is
developed,
demonstrating
sharp
across
extensive
focal
depth
range.
Remarkably,
exhibits
groundbreaking
advancement
enabling
underwater
AR
displays
without
necessitating
special
waterproof
treatments,
underscoring
its
potential
versatility
adaptability
challenging
environments.
This
paves
new
way
for
practical
applications
NEDs
complex
demanding
conditions,
thereby
contributing
evolution
NED
systems.
Abstract
GaN‐based
miniaturized
light‐emitting
diodes
(mini‐LEDs)
have
emerged
as
highly
promising
light
sources
for
high‐performance
aircraft
cockpit
displays.
Among
these
diodes,
vertically
stacked
blue‒green
dual‐color
mini‐LEDs
are
fabricated
and
show
excellent
color‐tunable
properties.
When
packaged
with
K
2
SiF
6
:Mn
4+
,
an
impressive
color
gamut
area
ratio
of
113.63%
NTSC
is
demonstrated.
However,
vertical
optical
crosstalk
originates
from
the
photoluminescence
(PL)
effect
green
epitaxial
layer
when
blue
mini‐LED
powered
on,
making
precise
chromatic
characteristics
difficult
to
obtain.
To
address
this
problem,
a
deep
neural
network
(DNN)
proposed,
which
combines
forward
modeling
inverse
design
in
tandem
architecture.
This
DNN
supports
current
modulation
scheme
that
enables
control
chromaticity
coordinates,
achieving
Δ
u
′
v
0.003.
These
advancements
materials
device
strategies
pave
way
developing
low
difference,
high‐resolution
display
systems
cockpits.
Optics Express,
Journal Year:
2024,
Volume and Issue:
32(8), P. 14876 - 14876
Published: April 1, 2024
Visible
light
communication
(VLC)
can
be
integrated
into
a
liquid
crystal
display
(LCD)
by
modulating
its
backlight
while
normally
showing
pictures.
Received
ordinary
cameras,
such
and
(IDAC)
systems
are
promising
for
the
Internet
of
Things
Metaverse.
However,
in
premise
unaffected
function,
capacity
current
IDAC
is
limited,
with
data
rates
very
few
kbps.
This
work
proposes
new
architecture:
multiple-input,
multiple-output
(MIMO)
VLC
mini-LED
LCD,
whose
many
segments
act
as
multiple
transmitters.
A
camera
utilizes
rolling
shutter
effect
independent
pixel
columns
to
form
outputs.
The
thus
significantly
multiplied
column
number.
In
addition,
local
dimming,
which
favorable
an
LCD’s
contrast
power
consumption,
exploited
achieve
efficient
signal
modulation.
We
built
LCD
prototype
8-by-20
experimental
verification.
multiplex
video-rate
dimming
high-frequency
(∼34
kHz)
modulated
through
multi-pulse
position
modulation
(MPPM)
VLC.
By
taking
photographs
1.1
m
away
from
screen,
record-high
rate
201.6
kbps
(approximately
ten
times
faster
than
systems)
was
experimentally
achieved
bit
error
satisfying
forward
correction.
Improved
image
due
also
observed.
Energy Technology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 9, 2025
The
transparent
displays
can
provide
unprecedented
see‐through
visual
experiences,
facilitating
the
implementation
of
augmented
reality
and
human–machine
interaction
in
metaverse
era.
In
recent
years,
self‐emissive
technology
has
been
increasingly
applied
development
displays.
This
review
introduces
latest
advancements
display
technologies
that
employ
small‐pitch
light‐emitting
diodes
(LEDs),
organic
LEDs,
mini‐LEDs,
micro‐LEDs,
quantum
dots.
Additionally,
it
highlights
basic
principles,
key
devices,
future
pathways
for
achieving
high‐performance
Discover Nano,
Journal Year:
2024,
Volume and Issue:
19(1)
Published: May 28, 2024
Abstract
In
this
research,
we
introduce
an
advanced
methodology
for
the
calculation
of
bulk
light
sources
tailored
free-form
surface
design,
focusing
on
principle
energy
conservation.
This
method
is
especially
relevant
evolving
needs
micro-LED
packaging,
highlighting
its
potential
in
burgeoning
field.
Our
work
includes
development
algorithm
creating
freeform-designed
chip-scale
package
(FDCSP)
components.
These
components
seamlessly
integrate
LEDs
and
lenses,
underscoring
our
commitment
to
advancing
design
chip-level
packaging.
By
adhering
conservation,
approach
facilitates
a
meticulous
comparison
simulation
outcomes
with
predefined
target
functions.
enables
iterative
correction
discrepancies,
employing
layering
techniques
refine
until
simulated
results
closely
align
goals,
as
demonstrated
by
appropriate
difference
curve.
The
practical
application
these
simulations
leads
innovative
FDCSP
devices.
Notably,
devices
are
not
just
suitable
traditional
applications
backlight
modules
but
explicitly
optimized
emerging
sector
successful
demonstration
within
represents
significant
achievement.
It
underscores
effectiveness
strategy
expansive
transform
packaging
solutions.
research
only
contributes
theoretical
understanding
conservation
lighting
also
paves
way
groundbreaking
module
technologies.
Crystals,
Journal Year:
2024,
Volume and Issue:
14(11), P. 922 - 922
Published: Oct. 25, 2024
Miniaturized-light-emitting
diode
(mini-LED)
backlights
have
emerged
as
the
state-of-the-art
technology
for
liquid
crystal
display
(LCD),
facilitating
improvement
in
a
high
dynamic
range
(HDR)
and
power
saving.
The
local
dimming
divides
backlight
into
several
zones.
Employing
mini-LEDs,
whose
size
ranges
from
100
to
200
μm,
light
sources
can
enlarge
number
of
zones
backlight,
fulfilling
requirement
HDR.
However,
halo
effect
still
acts
one
primary
technological
bottlenecks
mini-LED
backlights.
In
this
review,
packaging
LEDs,
color
conversion,
driving
scheme
been
discussed.
strategies
reduce
optical
crosstalk
adjacent
areas
by
various
improved
structures
or
suppress
LCDs
are
summarized.
development
trends
also
Optics Express,
Journal Year:
2024,
Volume and Issue:
33(2), P. 2019 - 2019
Published: Dec. 27, 2024
Waveguide
coupling
design
is
one
of
the
most
challenging
topics
in
augmented
reality
(AR)
near-eye
displays
(NED).
The
primary
challenge
stems
from
necessity
to
simultaneously
address
two
competing
factors:
overall
volume
AR
system
and
occurrence
chromatic
aberration.
To
this
issue,
what
we
believe
be
a
novel
tandem
trilayer
achromatic
metasurface
specifically
designed
for
waveguide
NEDs,
capable
achieving
an
effect
nanometer-thin
layer.
By
analyzing
influence
unit
structure
parameters
on
phase
delay
input
electromagnetic
waves,
optimal
are
determined
established.
Simulation
results
show
that
incident
light
can
deflected
by
45°,
46°,
45°
at
wavelengths
440
nm
∼
470
nm,
520
550
620
660
respectively.
angular
deviation
error
three
colors
maintained
lower
than
1°
waveguide,
ensuring
satisfactory
effect.
This
provides
new
solution
developing
ultra-thin
compact
optical
systems
full-color
NEDs.
