U.S. patent application number 11/189066 was filed with the patent office on 2007-02-01 for c7, c9 led bulb and embedded pcb circuit board.
Invention is credited to Jing Jing Yu.
Application Number | 20070025109 11/189066 |
Document ID | / |
Family ID | 37694082 |
Filed Date | 2007-02-01 |
United States Patent
Application |
20070025109 |
Kind Code |
A1 |
Yu; Jing Jing |
February 1, 2007 |
C7, C9 LED bulb and embedded PCB circuit board
Abstract
The invention presents a new design of C7 or C9 type LED bulb
and its embedded PCB electronic circuit board structure, comprising
a lamp cover, LEDs, a PCB circuit board and a base. The bulb houses
one or multiple number of LEDs. The LEDs are soldered on the PCB
board that is embedded inside of the base. The PCB board power
input ports connect to the brass base or are directly wired to
outside the base. The base and the lamp cover may be attached
together by means of bonding (thermal, sonic or solvent), friction
interference fit, adhesive or simply by screwing the lamp cover
into the threaded base. The PCB board, utilizing a bridge design,
allows the LED bulb to be directly powered by 110-120V AC voltage
power sources. The simple bulb design significantly reduces the
weight of the entire product and power consumption.
Inventors: |
Yu; Jing Jing; (Vancouver,
CA) |
Correspondence
Address: |
Jing Jing Yu
5-12800 Bathgate Way
Richmond
V6V 1Z4
CA
|
Family ID: |
37694082 |
Appl. No.: |
11/189066 |
Filed: |
July 26, 2005 |
Current U.S.
Class: |
362/362 |
Current CPC
Class: |
Y02B 20/30 20130101;
Y10S 362/80 20130101; F21Y 2115/10 20160801; F21V 3/02 20130101;
F21W 2121/00 20130101; F21K 9/232 20160801; H05B 45/34
20200101 |
Class at
Publication: |
362/362 |
International
Class: |
F21V 15/00 20060101
F21V015/00 |
Claims
1. A new C9 style LED bulb comprising: a lamp cover, LEDs, a PCB
electronic circuit board, a brass base. The bulb houses the LEDs
that are soldered on the PCB board, and the PCB board is embedded
inside of the base. The voltage input ports of the PCB board are
connected to the brass connectors.
2. The LED bulb of claim 1, wherein said bulb can be a C7 style LED
bulb.
3. The LED bulb of claim 1, wherein said base can be a E12 type
base.
4. The LED bulb of claim 1, wherein said base can be a E14 type
base.
5. The LED bulb of claim 1, wherein said base can be a E17 type
base.
6. The LED bulb of claim 1, wherein said lamp cover can be
round.
7. The LED bulb of claim 1, wherein said lamp cover can be of a
polygonal shape.
8. The LED bulb of claim 1, wherein said PCB board is used to
connect LEDs to 110-120V AC voltage.
9. The PCB board of claim 8, wherein said AC 110-120V voltage
inputs are in series with a resistor and capacitor unit and another
resistor before connecting to a voltage bridge unit which transfers
AC to DC voltage.
10. The LED bulb of claim 1, wherein a fuse is used to limit the
total current and protect the PCB board and LEDs.
11. The PCB board of claim 8, wherein said output voltage to LEDs
is stabilized by connecting the capacitor and voltage regulator
diode in parallel.
12. The LED bulb of claim 1, wherein said lamp cover can be
securely attached to the base by screwing the lamp cover into the
threaded base
13. The LED bulb of claim 1, wherein said lamp cover can be
securely attached to the base by adhesive.
14. The LE bulb of claim 1, wherein said LED pins are connected to
the PCB board by soldering.
15. The LED bulb of claim 1, wherein said lamp cover can be
securely attached to the base by adhesive.
16. The LED bulb of claim 1, wherein said base can be made with any
suitable conducting material.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to lighting decoration
technologies and, more particularly, to light emitting diode (LED)
C7 and C9 types bulbs used for lighting and decoration.
DESCRIPTION OF RELATED ART
[0002] Lighting is one of the most important parts of our everyday
life. The light bulbs, since invented in 1879, have profoundly
changed human existence by illuminating the night and making it
hospitable to a wide range of activity. One of the goals of
developing lighting technologies is to meet different illumination
requirements for different activities, e.g., Living, office,
meeting, entertainment, and etc. An efficient lighting structure
not only comforts our eyes, but also save electrical power. The
second goal of lighting is to decorate the lighted room by shining
on the indoor objects and showing their shapes and sizes. For
displaying art works, such as pictures, carpets and flowers,
lighting is even required to show their colors inside of a
room.
[0003] Light Emitting Diodes (LED) are semiconductor diodes and
belong to the group of electroluminescent luminaries. The light is
generated by recombining charge-carrier pairs in a semiconductor
with an appropriate energy band gap. The LEDs produce a narrow
banded radiation. The properties of LEDs, including their low
operating voltage and power, small sizes, long lifetime and great
stability, make them desirable lighting sources. The LEDs are cool
light source without generating heat and thus are safe for daily
operation.
[0004] However, current C7 and C9 bulbs with either Tungsten
filaments or LED solid bulb bodies waste most of electrical power
into heat and have a serious optical loss. Meanwhile, limited by
LED specifications, the current LED bulbs with C7 and C9 designs
have no way to be directly powered by 110-120V AC household power
supply. Thus, the applications of LED C7 and C9 bulbs are
limited.
DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 shows the C7 or C9 LED bulb structure. The LED bulb
consists of a lamp cover 1, one or multiple numbers of LEDs 2, a
PCB circuit board 3, and a base 6. The pins (there are two in the
example shown in this drawings, but other LEDs may have more) 5 of
the LEDs 2 are soldered onto the PCB board 3 that is embedded
inside of the base 6. The voltage input ports 7 of the PCB board 3
are connected to the brass connector 4. The base 6 and the lamp
cover 1 may be attached together by bonding (thermal, sonic or
solvent), friction interference fit, adhesive or simply by screwing
the lamp cover 1 into the threaded base 6.
[0006] FIG. 2 shows the PCB electronic circuit diagram. The AC
110-120V voltage input is in series with an RC (resistor R1 and
capacitor C1 in parallel) unit and resistor R2 before connecting to
a voltage bridge unit that transfers AC to DC voltage. A fuse is
used to limit the total current and protect the PCB board and LEDs.
A Capacitor C2 and voltage regulator diode DZ1 are wired in
parallel to the bridge output to stabilize the voltage on the LEDs.
The designed PCB board are capable to drive one or multiple LEDs
wired in parallel to meet different requirement of lumens.
DESCRIPTION OF THE INVENTION
[0007] The present invention provides a new LED design for C7 and
C9 bulbs. The PCB electronic circuit board structure enables LEDs
to be directly powered by 110-120V AC power supply, and
dramatically reduces power consumption compared to traditional C7
and C9 bulbs.
[0008] As shown in FIG. 1, the LED bulb consists of a lamp cover,
LEDs, a PCB electronic circuit board, and a brass base or a base
made with appropriate material. Different from the traditional
bulbs, the bulb of the invention houses the LEDs that are soldered
on the PCB board, and the PCB board is embedded inside of the base
such that the lamp cover, the LEDs, PCB board, and the base, when
fully assembled, forms the invented LED bulb. The PCB board is used
here to provide a connection between the internal LEDs and the
external 110-120V AC voltage.
[0009] FIG. 2 shows the electronic circuit of the PCB board used in
the LED bulb. After passing through a capacitor C1 and resistors R1
and R2 (C1 is in parallel with R1, and then in series with R2), the
110-120V AC voltage connects to a bridge unit that transfers the AC
into DC voltage. The output voltage from the bridge is stabilized
by a capacitor C2 and voltage regulator diode DZ1, in parallel with
LEDs (there are three in the example shown in this drawing). A fuse
is used to limit the total electrical current, and protect the LEDs
and the PCB board.
[0010] The lamp cover of the LED bulb may be wholly or partially
transparent, translucent, or with a pattern as desired. Standard
E12/E14/E17 bases may be applied when C7 and C9 style bulbs are
used. As indicated before, the base and the lamp cover may be
attached together by means of bonding (thermal, sonic or solvent),
friction interference fit, adhesive or simply by screwing the lamp
cover into the threaded base.
[0011] The LED bulb is mostly empty inside as only LEDs and a small
PCB board are housed between the lamp cover and the base. This
simple bulb structure greatly reduces light optical absorption loss
that is commonly seen in the traditional solid LED bulbs.
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