DISPOSITIF D'ECLAIRAGE A DIODE ELECTROLUMINESCENTE, EN FORME DE DISQUE

DISC-SHAPED LIGHT-EMITTING DIODE ILLUMINATION DEVICE

Abrégé français

Un dispositif d'éclairage à diode électroluminescente comprend un culot pour ampoule standard permettant de recevoir une alimentation électrique en C.A., un bloc d'alimentation fixé solidement et branché électriquement au culot pour ampoule standard, un disque planaire fixé solidement au bloc d'alimentation, et plusieurs puces à diodes électroluminescentes haute efficacité montées solidement sur la surface inférieure du disque planaire et reliées électriquement au bloc d'alimentation. Le culot pour ampoule standard peut être vissé dans une douille d'ampoule standard sur un plafond ou un mur de salle. Dans un autre mode de réalisation de l'invention, le disque planaire peut être positionné dans une grille de plafond suspendu ou dans une grille de mur de salle. Le dispositif d'éclairage à diode électroluminescente peut également comporter un écran monté solidement en dessous de la pluralité de puces à diodes électroluminescentes haute efficacité, et la principale utilisation de la présente invention concerne les lampes de plafond et les lampes de mur d'une salle.

Abrégé anglais

A light-emitting diode illumination device comprises a standard light-bulb base for receiving AC electrical power, a power supply assembly securely attached and electrically connected to the standard light-bulb base, a planar disc securely attached to the power supply assembly, and a plurality of high-efficiency light-emitting diode chips securely mounted on the bottom surface of the planar disc and electrically connected to the power supply assembly. The standard light-bulb base has the capability of being screwed into a standard light-bulb socket on a ceiling or a wall of a room. In another embodiment of the invention, the planar disc has the capability of being positioned into a grid of a suspended ceiling or a grid of a wall of a room. The light-emitting diode illumination device may further comprise a screen securely mounted below the plurality of high-efficiency light-emitting diode chips. This invention relates to illumination devices, and the principal use of the invention is for ceiling lamps and wall lamps in a room.

Revendications

Claims
.cndot. The embodiments of the invention in which an
exclusive property or privilege is claimed are
defined as follows:
1. A light-emitting diode illumination device,
comprising:
a standard light-bulb base for receiving
AC electrical power;
a power supply assembly securely attached
and electrically connected to the standard
light-bulb base, the power supply assembly
comprising a circuitry for converting AC
electrical power to DC electrical power;
a planar disc having an arbitrary
2-dimensional shape and an arbitrary size,
the planar disc mounted perpendicularly to
the axis of the standard light-bulb base,
the planar disc securely attached to the
power supply assembly without any moving
parts, the planar disc comprising means
for distributing DC electrical power from
the power supply assembly; and
a plurality of high-efficiency
light-emitting diode chips securely
mounted on the bottom surface of the
planar disc and electrically connected to
the power supply assembly via the means
for distributing DC electrical power from
the power supply assembly, the
high-efficiency light-emitting diode chips
uniformly positioned in a symmetrical
array;
the light-emitting diode illumination device
emitting white light, the standard light-bulb
base having the capability of being screwed
into a standard light-bulb socket on a ceiling
or on a wall of a room.
2. A light-emitting diode illumination device as
defined in claim 1, in which the standard
light-bulb base is Edison-type, and the
standard light-bulb socket is Edison-type.
3. A light-emitting diode illumination device as

defined in claim 1, in which the planar disc is
round.
4. A light-emitting diode illumination device as
defined in claim 1, in which the planar disc is
polygonal.
5. A light-emitting diode illumination device,
comprising:
a line cord for receiving AC electrical
power;
a power supply assembly securely attached
and electrically connected to the line
cord, the power supply assembly comprising
a circuitry for converting AC electrical
power to DC electrical power;
a polygonal planar disc securely attached
to the power supply assembly, the
polygonal planar disc comprising means for
distributing DC electrical power from the
power supply assembly; and
a plurality of high-efficiency
light-emitting diode chips securely
mounted on the bottom surface of the
polygonal planar disc and electrically
connected to the power supply assembly via
the means for distributing DC electrical
power from the power supply assembly, the
high-efficiency light-emitting diode chips
uniformly positioned in a symmetrical
array;
the light-emitting diode illumination device
emitting white light, the polygonal planar disc
having the capability of being positioned
exactly into a grid of a suspended ceiling or
into a grid of a wall of a room, the polygonal
planar disc mounted parallelly to the plane of
the suspended ceiling or to the plane of the
wall.
6. A light-emitting diode illumination device as
defined in claim 1 or claim 5, in which the
bottom surface of the planar disc is coated
with a light-reflective material.
7. A light-emitting diode illumination device as
defined in claim 1 or claim 5, in which each

high-efficiency light-emitting diode chip
comprises an integrated lens.
8. A light-emitting diode illumination device as
defined in claim 7, in which the integrated
lens of each high-efficiency light-emitting
diode chip is made of a light-diffusing
material.
9. A light-emitting diode illumination device as
defined in claim 1 or claim 5, further
comprising:
a screen securely mounted below the
plurality of high-efficiency
light-emitting diode chips via an airgap.
10. A light-emitting diode illumination device as
defined in claim 9, in which the screen is a
translucent light diffuser for diffusing light
from the plurality of high-efficiency
light-emitting diode chips.
11. A light-emitting diode illumination device as
defined in claim 9, in which the screen is a
transmission-type diffraction grating for
diffracting light from the plurality of
high-efficiency light-emitting diode chips.
12. A light-emitting diode illumination device as
defined in claim 9, in which the screen is
coated with phosphors for emitting white light
by fluorescence, and each high-efficiency
light-emitting diode chip emits light at
wavelengths in the ultra-violet region of the
electromagnetic spectrum in order to excite the
phosphors on the screen.

Description

CA 02312285 2004-01-19
Description
Title
= Disc-Shaped Light-Emitting Diode Illumination
Device
Technical Field
= This invention relates to illumination devices,
more particularly to a light-emitting diode
illumination device.
Background Art
= There are many instances where it would be
desirable to be able to illuminate a room with
a high-efficiency low-maintenance illumination
device, and to provide a direct drop-in
replacement of conventional low-efficiency
high-maintenance light fixtures.
= A number of utility and design patents disclose
light-emitting diode devices.
= Most light-emitting diode devices are used in
information display panels, emergency exit
signs, traffic lights, safety indicators, etc.
Some of them have an Edison-type base for
screwing into an Edison-type socket. However,
they are encased in a generally spherical
transparent glass bulb.
= Canadian Patent 1 205 931 discloses "SOLID
STATE DISPLAY SYSTEM AND LIGHT EMITTING DIODE
PIXELS THEREFOR". This prior art is a planar
display system with a matrix of pixels.
However, it does not function as an
illumination device.
= U.S. Patent 6 056 420 discloses "Illuminator".
This prior art is an illuminator for use in a
darkroom or with scientific instrumentation
with several light emitting diodes arranged in
a regular array. However, it does not have a
planar shape.
= These prior art arrangements do not have a
planar disc-shape and the capability of being
screwed into a standard light-bulb socket on a
ceiling or a wall of a room, or being

CA 02312285 2004-01-19
positioned into a grid of a suspended ceiling
or a grid of a wall of a room. Moreover, they
do not serve as a lighting fixture.
Description of the Invention
= It is a primary object of the invention to
provide a disc-shaped high-efficiency
light-emitting diode illumination device to
illuminate a room.
= It is another object of the invention to
provide a light-emitting diode illumination
device that also serves as a lighting fixture.
= It is another object of the invention to
provide a light-emitting diode illumination
device that screws into a standard light-bulb
socket on a ceiling or a wall of a room.
= It is another object of the invention to
provide a light-emitting diode illumination
device that positions into a grid of a
suspended ceiling or a wall of a room.
= A light-emitting diode illumination device
comprises a standard light-bulb base for
receiving AC electrical power, a power supply
assembly securely attached and electrically
connected to the standard light-bulb base, a
planar disc securely attached to the power
supply assembly, and a plurality of
high-efficiency light-emitting diode chips
securely mounted on the bottom surface of the
planar disc and electrically connected to the
power supply assembly. The standard light-bulb
base has the capability of being screwed into a
standard light-bulb socket on a ceiling or a
wall of a room. In another embodiment of the
invention, the planar disc has the capability
of being positioned into a grid of a suspended
ceiling or a grid of a wall of a room. The
light-emitting diode illumination device may
further comprise a screen securely mounted
below the plurality of high-efficiency
light-emitting diode chips.
Brief Description of the Figures in the Drawings
= In drawings which illustrate embodiments of the
invention:

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Figure 1 marked "Prior Art" is a sectional
view of a conventional light-emitting
diode illumination device;
Figure 2 is a perspective view of one
embodiment of a light-emitting diode
illumination device according to the
invention;
Figure 3 is a sectional view of the
light-emitting diode illumination device
along line I-I of Figure 2;
Figure 4 is a bottom view of the
light-emitting diode illumination device
of Figure 2;
Figure 5 is a bottom view of another
embodiment of a light-emitting diode
illumination device according to the
invention;
Figure 6 is a sectional view of another
embodiment of a light-emitting diode
illumination device according to the
invention;
Figure 7 is a sectional view of another
embodiment of a light-emitting diode
illumination device according to the
invention; and
Figure 8 is a perspective view of another
embodiment of a light-emitting diode
illumination device according to the
invention.
Modes for Carrying Out the Invention
= In one conventional light-emitting diode
illumination device shown in Figure 1 marked
"Prior Art", a light-emitting diode
illumination device comprises a light-bulb base
1-0 for receiving AC electrical power, a power
supply assembly 2-0 securely attached and
electrically connected to the light-bulb base
1-0, a transparent glass bulb 3-0 securely
attached to the light-bulb base 1-0, and a
plurality of light-emitting diode chips 4-0
securely mounted on the bottom surface of the
power supply assembly 2-0 and electrically
connected to the power supply assembly 2-0.

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= According to the prior art, the power supply
assembly 2-0 and the plurality of
light-emitting diode chips 4-0 are encased in a
generally spherical transparent glass bulb 3-0.
= In one embodiment of the invention shown in
Figure 2, Figure 3 and Figure 4, a
light-emitting diode illumination device
comprises a standard light-bulb base 1-1 for
receiving AC electrical power, a power supply
assembly 2-1 securely attached and electrically
connected to the standard light-bulb base 1-1
without any moving parts, a planar disc 3-i
securely attached to the power supply assembly
2-1, and a plurality of high-efficiency
light-emitting diode chips 4-1 securely mounted
on the bottom surface of the planar disc 3-i.
= The power supply assembly 2-1 comprises a
circuitry for converting AC electrical power to
DC electrical power. The planar disc 3-i has an
arbitrary 2-dimensional shape and an arbitrary
size. The planar disc 3-1 is mounted
perpendicularly to the axis of the standard
light-bulb base 1-1. The planar disc 3-1
comprises means for distributing DC electrical
power from the power supply assembly 2-i. The
plurality of high-efficiency light-emitting
diode chips 4-1 are electrically connected to
the power supply assembly 2-1 via the means for
distributing DC electrical power from the power
supply assembly 2-1. The plurality of
high-efficiency light-emitting diode chips 4-1
are uniformly positioned in a symmetrical
array.
= The light-emitting diode illumination device
emits white light.
= According to this embodiment of the present
invention, the standard light-bulb base 1-1 has
the capability of being screwed into a standard
light-bulb socket on a ceiling or on a wall of
a room.
= The standard light-bulb base 1-1 may be
Edison-type, and the standard light-bulb socket
may be Edison-type.
= The planar disc 3-1 may be round, i.e.,
circular, elliptical, etc. Alternatively, the

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planar disc may be polygonal, i.e., octagonal,
hexagonal, rectangular, triangular, etc. Figure
shows an octagonal planar disc 3-1.
= The bottom surface of the planar disc 3-1 may
be coated with a light-reflective material such
as aluminum.
= Each high-efficiency light-emitting diode chip
4-1 may comprise an integrated lens.
Furthermore, the integrated lens of each
high-efficiency light-emitting diode chip 4-1
may be made of a light-diffusing material.
= Each high-efficiency light-emitting diode chip
4-1 may emit white light. Alternatively, each
high-efficiency light-emitting diode chip may
emit light of one of primary colours, i.e.,
red, green or blue.
= The light-emitting diode illumination device
may further comprise a screen 5-1 securely
mounted below the plurality of high-efficiency
light-emitting diode chips 4-1 via an airgap,
as shown in Figure 6 (with integrated lenses)
and Figure 7 (without integrated lenses). The
screen 5-1 may be a translucent light diffuser
for diffusing light from the plurality of
high-efficiency light-emitting diode chips 4-1.
Alternatively, the screen 5-1 may be a
transmission-type diffraction grating for
diffracting light from the plurality of
high-efficiency light-emitting diode chips 4-1.
= The screen 5-1 may be coated with phosphors for
emitting white light by fluorescence, and each
high-efficiency light-emitting diode chip 4-1
may emit light at wavelengths in the
ultra-violet region of the electromagnetic
spectrum in order to excite the phosphors on
the screen 5-1.
= In another embodiment of the invention shown in
Figure 8, a light-emitting diode illumination
device comprises a line cord 1-2 for receiving
AC electrical power, a power supply assembly
2-2 securely attached and electrically
connected to the line cord 1-2, a polygonal
planar disc 3-2 securely attached to the power
supply assembly 2-2, and a plurality of
high-efficiency light-emitting diode chips 4-2
securely mounted on the bottom surface of the

CA 02312285 2004-01-19
polygonal planar disc 3-2.
= The power supply assembly 2-2 comprises a
circuitry for converting AC electrical power to
DC electrical power. The polygonal planar disc
3-2 comprises means for distributing DC
electrical power from the power supply assembly
2-2. The plurality of high-efficiency
light-emitting diode chips 4-2 are electrically
connected to the power supply assembly 2-2 via
the means for distributing DC electrical power
from the power supply assembly 2-2. The
plurality of high-efficiency light-emitting
diode chips 4-2 are uniformly positioned in a
symmetrical array.
= The light-emitting diode illumination device
emits white light.
= According to this embodiment of the present
invention, the polygonal planar disc 3-2 has
the capability of being positioned exactly into
a grid of a suspended ceiling or into a grid of
a wall of a room. Yhe polygonal planar disc 3-2
is mounted parallelly to the plane of the
suspended ceiling or to the plane of the wall.
= The polygonal planar disc 3-2 of the
light-emitting diode illumination device may be
polygonal, i.e., octagonal, hexagonal,
rectangular, triangular, etc. Figure 8 shows a
rectangular planar disc 3-2.
= The light-emitting diode illumination device
may further comprise a screen 5-2 securely
mounted below the plurality of high-efficiency
light-emitting diode chips 4-2 via an airgap,
as shown in Figure 8. The screen 5-2 may be a
translucent light diffuser for diffusing light
from the plurality of high-efficiency
light-emitting diode chips 4-2. Alternatively,
the screen 5-2 may be a transmission-type
diffraction grating for diffracting light from
the plurality of high-efficiency light-emitting
diode chips 4-2.
= The screen 5-2 may be coated with phosphors for
emitting white light by fluorescence, and each
high-efficiency light-emitting diode chip 4-2
may emit light at wavelengths in the
ultra-violet region of the electromagnetic
spectrum in order to excite the phosphors on

CA 02312285 2004-01-19
the screen 5-2.

Dessin représentatif