Note: Descriptions are shown in the official language in which they were submitted.
CA 02748753 2011-08-11
Attorney Docket No. 25666-4
Lighting Device Controlling Circuit Module
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a controlling circuit module, and more
particularly,
to a lighting device controlling circuit module capable of being integrated
with an LED
fluorescent lamp.
2. Description of Related Art
Fluorescent lamp is a bright and soft light source, which is applied in
everywhere,
such as homes, shops, offices, schools, supermarkets, hospitals, commercial
freezers,
advertising light boxes, metro, pedestrian tunnels, night market, etc.
Generally, for
controlling the fluorescent lamp to emit light or stop emitting light, a start
circuit must to
be used in fluorescent lamp framework.
Please refer to FIG. 1, which illustrates a framework view of a conventional
fluorescent lamp start circuit. As shown in FIG. 1, the conventional
fluorescent lamp start
circuit framework includes: a ballast 12', a power switch 13', a power source
14, and a
starter 15', wherein a fluorescent lamp 11' is coupled to the ballast 12', the
power source
14 and the starter 15', and the power switch 13' is disposed between the power
source 14
and the ballast 12'.
Everyone knows that, the conventional fluorescent lamp start circuit has a
poor
power usage resulted from high-voltage starting way thereof. Besides, since
the
fluorescent lamp 11' lights by way of the electrons discharge, the fluorescent
lamp 11'
and the starter 15' become consumables and need to be regularly replaced.
Actually, it is
not hard for the common people to replace the fluorescent lamp 11' or the
starter 15' by a
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new one; however, it is difficult for the common people to replace the ballast
12' when
the ballast 12' is damaged.
Accordingly, in view of the conventional fluorescent lamp framework shows much
shortcomings and drawbacks as well as the traditional fluorescent lamps is
getting to be
replaced by LED fluorescent lamps, fluorescent lamp manufacturers propose an
electrical
ballast for controlling the LED fluorescent lamp. Please refer to FIG 2, which
illustrates a
framework diagram of the LED fluorescent lamp connecting with the electrical
ballast. As
shown in FIG 2, to established the framework of the LED fluorescent lamp
connecting
with the electrical ballast, it merely couples the four contacting terminals
in the two ends
of an LED fluorescent lamp 11" to an electrical ballast 16" and connects a
power plug
161' of the electrical ballast 16" to a power outlet, such that the framework
of the LED
fluorescent lamp connecting with the electrical ballast has been established.
Continuously referring to FIG. 2, and simultaneously referring to FIG. 3,
which
illustrates a framework view of the inner circuit of the electrical ballast.
As shown in FIG
3, the electrical ballast 16" is consisted of an AC/DC converting circuit 162"
and a
DC/AC converting circuit 163". The AC/DC converting circuit 162" includes a
Bridge
rectifier circuit 1621" and a filtering capacitor Cf", and the DC/AC
converting circuit
163" includes a controlling unit 1631", a first switching unit 1632", a second
switching
unit 1633", a resonance unit 1634", an activating capacitor Cav", a first
outputting
capacitor cat", and a second outputting capacitor Cot". By way of such inner
circuit
framework of the electrical ballast 16", the LED fluorescent lamp 11" can be
controlled
to emit light.
Currently, the electrical ballast 16" is able to be miniaturized and
integrated inside
the LED fluorescent lamp 11" for facilitate the common people to replace the
traditional
fluorescent lamp with the LED fluorescent lamp 11"; However, as shown in FIG.
2 and
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FIG. 3, because the electrical ballast 16" is used the two contacting
terminals of one end
of the LED fluorescent lamp 11" as the power-inputting terminal, people needs
to
indentify which two contact terminals of the LED fluorescent lamp 11' are used
as the
power-inputting terminal in advance when replacing the traditional fluorescent
lamp by
the LED fluorescent lamp 11'. It is able to know that, such installing way of
the LED
fluorescent lamp 11' is very inconvenient for the common people.
Accordingly, in view of the conventional fluorescent lamp framework and the
framework of the LED fluorescent lamp connecting with the electrical ballast
still have
shortcomings and drawbacks, the inventor of the present application has made
great
efforts to make inventive research thereon and eventually provided a lighting
device
controlling circuit module.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a lighting device
controlling circuit module for being integrated into an LED fluorescent lamp,
such that a
user can replace the traditional fluorescent lamp with the LED fluorescent
lamp having
the lighting device controlling circuit module so easily, and the user does
not need to
identify which two contacts of the LED fluorescent lamp are used as the power-
inputting
terminal before replacing the traditional fluorescent lamp by the LED
fluorescent lamp.
Accordingly, for achieving the abovementioned objective, the inventor proposes
a
lighting device controlling circuit module, comprising;
a first bridge rectifier unit, coupled to a power source;
a second bridge rectifier unit, coupled to the power source;
a power factor correction unit, coupled with the first bridge rectifier unit
and the
second bridge rectifier unit and used for correcting a power signal outputted
from the first
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bridge rectifier unit or the second bridge rectifier unit;
a controlling unit, coupled to the power factor correction unit for receiving
the power
signal corrected by the power factor correction unit, so as to further output
a control
signal, wherein the controlling unit has at least one single-stage oscillator
and at least one
comparator;
a feedback unit, coupled to the controlling unit for receiving the control
signal;
at least one switching unit, coupled with the feedback unit and the
controlling unit;
and
at least one boost/buck unit, coupled to the switching unit and has at least
one
activating inductor;
wherein when switching and controlling the lighting device to emit the light,
the
single-stage oscillator in the controlling unit outputs the control signal and
the feedback
unit couples the control signal to the switching unit, so as to turn on the
switching unit;
moreover, after the switching unit is turned on, the activating inductor of
the boost/buck
unit induces a current signal and outputs the current signal to the lighting
device for
driving the lighting device to emit the light;
wherein when the lighting device is emitting the light, the activating
inductor
feedbacks the current signal to the feedback unit, meanwhile, the feedback
unit converts
the current signal to a feedback voltage signal and outputs the feedback
voltage signal to
the controlling unit, then the comparator in the controlling unit monitors and
compares
the feedback voltage signal; therefore, once the peak value of the feedback
voltage signal
is greater than a specific voltage value, the controlling unit outputs the
control signal to
turn off the switching unit for keeping the current value of the current
signal to a constant
value.
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BRIEF DESCRIPTION OF THE DRAWINGS
The invention as well as a preferred mode of use and advantages thereof will
be best
understood by referring to the following detailed description of an
illustrative
embodiment in conjunction with the accompanying drawings, wherein:
FIG. 1 is a framework view of a conventional fluorescent lamp start circuit;
FIG. 2 is a framework diagram of an LED fluorescent lamp connecting with an
electrical ballast;
FIG. 3 is an inner framework view of the electrical ballast;
FIG. 4 is a framework diagram of a lighting device controlling circuit module
according to the present invention;
FIG. 5 is a framework of the inner circuit of the lighting device controlling
circuit
module;
FIG. 6 is a stereo view of an LED fluorescent lamp integrated with the
lighting
device controlling circuit module; and
FIG. 7 is an exploded view of an LED lamp integrated with the lighting device
controlling circuit module.
DETAILED DESCRIPTION OF THE INVENTION
To more clearly describe a lighting device controlling circuit module
according to
the present invention, embodiments of the present invention will be described
in detail
with reference to the attached drawings hereinafter.
Please refer to FIG. 4, which illustrates a framework diagram of a lighting
device
controlling circuit module according to the present invention. As shown in
FIG. 4, the
lighting device controlling circuit module 1 includes: a first bridge
rectifier unit 11, a
second bridge rectifier unit 12, a power factor correction unit 13, a
controlling unit 14, a
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feedback unit 15, two switching units 16, two boost/buck units 17, and a
voltage-regulating capacitor CVR.
Continuously referring to FIG. 4, and simultaneously referring to FIG. 5,
which
illustrates a framework of the inner circuit of the lighting device
controlling circuit
module. As shown in FIG. 4 and FIG. 5, the first bridge rectifier unit 11 and
the second
bridge rectifier unit 12 are coupled to a power source 3. The power factor
correction unit
13 is consisted of a first diode D1, a second diode D2, a third diode D3, a
first capacitor
Cl, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4,
and the power
factor correction unit 13 is coupled to the first bridge rectifier unit 11 and
the second
bridge rectifier unit 12 for correcting a power signal outputted from the
first bridge
rectifier unit 11 or the second bridge rectifier unit 12.
The controlling unit 14 is coupled to the power factor correction unit 13 for
receiving the power signal corrected by the power factor correction unit 13,
so as to
further output a control signal, wherein the controlling unit 14 has at least
one
single-stage oscillator (not shown in FIGs.) and at least one comparator (not
shown in
FIGs.). The feedback unit 15 is consisted of a low-pass filtering capacitor
CLp, a low-pass
filtering resistor RLp and at least one feedback resistor RFB and coupled to
the controlling
unit 14 for receiving the control signal. In which, as shown in FIG. 5, the
feedback
resistor RFB includes four resistors parallel to each other. The two switching
units16 are
coupled with the feedback unit 15 and the controlling unit 14, moreover, in
the circuit
framework of the lighting device controlling circuit module 1 of the present
invention, the
switching unit16 can be a metal-oxide-semiconductor field-effect transistor
(MOSFET) or
a bipolar junction transistor (BJT), and preferably, in the embodiment of the
lighting
device controlling circuit module 1, the MOSFET is used as the switching unit
16.
The boost/buck unit 17 is consisted of a Schottky diode Ds and an activating
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inductor LAC, and the boost/buck unit 17 is coupled to the switching unit 16.
In the circuit
framework of the lighting device controlling circuit module 1, when switching
and
controlling the lighting device 2 to emit the light, the single-stage
oscillator in the
controlling unit 14 outputs the control signal and the feedback unit 15
couples the control
signal to the switching unit 16, so as to turn on the switching unit 16;
moreover, after the
switching unit 16 is turned on, the activating inductor LAC of the boost/buck
unit 17 is
charged and induces a current signal, furthermore, the activating inductor LAC
outputs the
current signal to the lighting device 2 for driving the lighting device 2 to
emit the light. In
addition, when the lighting device 2 is emitting the light, the activating
inductor LAC
feedbacks the current signal to the feedback unit 15, meanwhile, the feedback
unit 15
converts the current signal to a feedback voltage signal and outputs the
feedback voltage
signal to the controlling unit 14, then the comparator in the controlling unit
14 would
monitor and compare the feedback voltage signal; therefore, once the peak
value of the
feedback voltage signal is greater than a specific voltage value, the
controlling unit 14
outputs the control signal to turn off the switching unit 16 for keeping the
current value of
the current signal to a constant value.
Thus, the circuit framework and the actuation principle of the lighting device
controlling circuit module 1 have been completed introduced. Herein, it needs
to make an
especially statement of that the lighting device 2 can be an LED fluorescent
lamp, an
LED lamp or a traditional fluorescent lamp; besides, the numbers of the
switching unit 16
and the boost/buck unit 17 are not limited to two. More clearly to explain
that, if the
number of the lighting device 2 connected to the lighting device controlling
circuit
module 1 is greater than two, the applied numbers of the switching unit 16 and
the
boost/buck unit 17 must to be adjusted according to the number of the lighting
device 2.
Inheriting to above description, if it uses the LED fluorescent lamp as the
lighting
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device 2, then the lighting device controlling circuit module 1 can be
implemented on a
printed circuit board and the lighting device 2 (LED fluorescent lamp) is
consisted of a
plurality of LED chips welded on the printed circuit board. Please refer to
FIG. 6, which
illustrates a stereo view of an LED fluorescent lamp integrated with the
lighting device
controlling circuit module. As shown in FIG. 6, the LED fluorescent lamp 4
integrated
with the lighting device controlling circuit module 1 includes: a lampshade
40, a printed
circuit board 41, a plurality of LED chips 42, and four power inputting
terminals 43. As
shown in FIG. 6, the lighting device controlling circuit module 1 is
implemented on the
printed circuit board, used for controlling the plurality of LED chips 42 to
emit light;
Moreover, the four power inputting terminals 43 of the LED fluorescent lamp 4
are
respectively connected to the two bridge rectifier units 11, 12 of the
lighting device
controlling circuit module 1. Therefore, when a user want to replace the
traditional
fluorescent lamp with the LED fluorescent lamp 4 having the lighting device
controlling
circuit module 1, the user can directly and easily replace the traditional
fluorescent lamp
by the LED fluorescent lamp 4, and the user does not need to identify which
two contacts
of the LED fluorescent lamp 4 are used as the power-inputting terminal before
doing the
replacement.
In addition, the lighting device controlling circuit module 1 of the present
invention
cam also be made to an electronic chip and further welded onto a printed
circuit board
with a plurality of LED chips. Please refer to FIG. 7, which illustrates an
exploded view
of an LED fluorescent lamp integrated with the lighting device controlling
circuit module.
As shown in FIG. 7, an LED lamp 4a integrated with the lighting device
controlling
circuit module 1 includes: a lampshade 40a, a printed circuit board 41a, a
plurality of
LED chips 42a, and a power inputting terminal 43a. In which the lighting
device
controlling circuit module 1 is made as the electronic chip and disposed on
the printed
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Attorney Docket No. 25666-4
circuit board 41a opposite to the plurality of LED chips 42a. Similarly, if
the user wants
to use the LED lamp 4a as a lighting device, the user merely couples the power
inputting
terminal 43a to a power source, i.e., putting the power inputting terminal 43a
into a
default power outlet, and that is so easy. Moreover, when the electronic chip
of the
lighting device controlling circuit module 1 is damaged, the user merely opens
the
lampshade 40a of the LED lamp 4a, then, the user is able to directly replace a
new
electronic chip, and the user does not need to identify which two contacts on
the printed
circuit board 41a are used as the power-inputting terminal.
Thus, through above descriptions, the lighting device controlling circuit
module of
the present invention has been clearly and completely introduced, so that,
according to the
above descriptions, it can easily understand that the present invention has
the following
advantages:
1. The lighting device controlling circuit module can be integrated inside an
LED
fluorescent lamp, and a user can directly replace the traditional fluorescent
lamp by the
LED fluorescent lamp having the lighting device controlling circuit module so
easily,
in addition, the user does not need to identify which two contacts of the LED
fluorescent lamp are used as the power-inputting terminal before replacing the
traditional fluorescent lamp by the LED fluorescent lamp.
2. The lighting device controlling circuit module can be made as an electronic
chip for
replacing the driving chip of the traditional LED lamp, moreover, when the
electronic
chip of the lighting device controlling circuit module is damaged, the user
merely
opens the lampshade of the LED lamp, then, the user can directly and easily
replace a
new electronic chip and not need to identify which two contacts on the printed
circuit
board are used as the power-inputting terminal.
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