CN208424857U - A kind of RCC light adjusting circuit and luminaire - Google Patents
A kind of RCC light adjusting circuit and luminaire Download PDFInfo
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- CN208424857U CN208424857U CN201821048456.5U CN201821048456U CN208424857U CN 208424857 U CN208424857 U CN 208424857U CN 201821048456 U CN201821048456 U CN 201821048456U CN 208424857 U CN208424857 U CN 208424857U
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Abstract
The utility model relates to RCC field of circuit technology, more particularly to a kind of RCC light adjusting circuit and luminaire.The RCC light adjusting circuit includes: RCC circuit, including transformer and switching tube, switching tube includes switch input terminal, output switching terminal and switch control terminal, the connection of the primary coil of switch input terminal and transformer, in switching tube conducting, electric current is by primary coil, and in switching tube cut-off, electric current does not pass through primary coil；Light adjusting circuit, including sampling end, light modulation enable end and light modulation output end；The sampling end of light adjusting circuit and the output switching terminal of switching tube connect, for sampling the first voltage for being applied to the output switching terminal of the switching tube；The light modulation enable end of light adjusting circuit is for receiving reference voltage；The light modulation output end of light adjusting circuit and the switch control terminal of switching tube connect, and light adjusting circuit is used for according to reference voltage and first voltage, control switch pipe on or off.The degree of regulation of its output power is relatively high, and circuit structure is simple.
Description
Technical field
The utility model relates to light regulating technology fields, more particularly to a kind of RCC light adjusting circuit and luminaire.
Background technique
With the development of lighting technology, user can be with the brightness or colour temperature of remote adjustment light, to meet varying environment
The demand of scene.
Traditional technology provides a kind of LED drive circuit, which is adjusted using dedicated LED driving chip
The brightness of LED light, circuit design is more complicated, and cost is relatively high, and the output power deviation for adjusting LED lamp is bigger, adjusts essence
It spends relatively low.
Utility model content
One purpose of the utility model embodiment is intended to provide a kind of RCC light adjusting circuit and luminaire, circuit structure
Simply, the degree of regulation of output power is relatively high.
In order to solve the above technical problems, the utility model embodiment the following technical schemes are provided:
In a first aspect, the utility model embodiment provides a kind of RCC light adjusting circuit, comprising:
RCC circuit, including transformer and switching tube, the switching tube include switch input terminal, output switching terminal and switch
Control terminal, the transformer include primary coil, and the primary coil of the switch input terminal of the switching tube and the transformer connects
It connects, in switching tube conducting, electric current is by the primary coil, and in switching tube cut-off, electric current does not pass through described
Primary coil；
Light adjusting circuit, including sampling end, light modulation enable end and light modulation output end；The sampling end of the light adjusting circuit with it is described
The output switching terminal of switching tube connects, for sampling the first voltage for being applied to the output switching terminal of the switching tube；The tune
The light modulation enable end of optical circuit is for receiving reference voltage；The switch of the light modulation output end and the switching tube of the light adjusting circuit
Control terminal connection, the light adjusting circuit are used to control the switching tube conducting according to the reference voltage and the first voltage
Or cut-off.
Optionally, the light adjusting circuit includes:
Sample circuit, the input terminal of the sample circuit are connect with the output switching terminal of the switching tube, are applied for sampling
It is added in the first voltage of the output switching terminal of the switching tube；
Comparison circuit, including first compare input terminal, second compare input terminal and compare output end, the comparison circuit
First compares input terminal connect with the output end of the sample circuit, and the second of the comparison circuit compares input terminal for receiving
The comparison output end of reference voltage, the comparison circuit is connect with the switch control terminal of the switching tube, and the comparison circuit is used
According to the reference voltage and the first voltage, the switching tube on or off is controlled.
Optionally, the comparison circuit includes:
Comparator, the inverting input terminal of the comparator are connect with the output end of the sample circuit；
Signal conditioning circuit, the input terminal of the signal conditioning circuit is for receiving reference voltage, the signal condition electricity
The output end on road is connect with the non-inverting input terminal of the comparator；
Isolation circuit, the input terminal of the isolation circuit are connect with the output end of the comparator, the isolation circuit
Output end is connect with the switch control terminal of the switching tube, when the comparator exports high level, the isolation circuit isolation
The high level, when the comparator exports low level, the switch control terminal of the switching tube is pulled to by the isolation circuit
The low level.
Optionally, the signal conditioning circuit includes filter circuit, and the input terminal of the filter circuit is for receiving benchmark
Voltage, the output end of the filter circuit are connect with the non-inverting input terminal of the comparator.
Optionally, the isolation circuit includes diode, the switch control of the anode and the switching tube of the diode
End connection, the cathode of the diode are connect with the output end of the comparator.
Optionally, the sample circuit includes first resistor, and described first resistor one end and the switch of the switching tube are defeated
Outlet connection, first resistor other end input terminal compared with the first of the comparison circuit connect.
Optionally, the reference voltage is pwm signal or sawtooth signal.
Optionally, the switching tube is NMOS tube, and the drain electrode of the NMOS tube is the switch input terminal of the switching tube, institute
The source electrode for stating NMOS tube is the output switching terminal of the switching tube, and the grid of the NMOS pipe is the switch control of the switching tube
End processed.
In second aspect, the utility model embodiment provides a kind of luminaire, including described in illuminator and any one
RCC light adjusting circuit, the transformer further includes secondary coil, the RCC light adjusting circuit by the secondary coil with it is described
Illuminator connection, powers for the illuminator.
In the RCC light adjusting circuit and luminaire that each embodiment of the utility model provides, the electricity of primary coil is flowed through
Stream can accurately reflect the size for being transferred to the output power of load, and switching tube is connect with primary coil, be connected in switching tube
When, electric current is by primary coil, and in switching tube cut-off, electric current does not pass through primary coil.Also, first voltage can be accurately
Reflection is by the size of current of primary coil, and then, light adjusting circuit is led according to reference voltage and first voltage, control switch pipe
Logical time or deadline, and then can accurately adjust the size for being transferred to the output power of load, therefore, output power
Degree of regulation it is relatively high, circuit structure is simple.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of circuit principle structure block diagram of RCC light adjusting circuit provided by the embodiment of the utility model；
Fig. 2 is a kind of electrical block diagram of comparison circuit provided by the embodiment of the utility model；
Fig. 3 is a kind of electrical block diagram for RCC light adjusting circuit that another embodiment of the utility model provides；
Fig. 4 is a kind of electrical block diagram for RCC light adjusting circuit that the utility model another embodiment provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
RCC light adjusting circuit (Ringing Choke converter, self-excited oscillation pulse converter) provided herein can be with
Luminaire is constituted in conjunction with illuminator, when selecting different type illuminator, which can be any type system.Cause
This, which may include illuminator and RCC light adjusting circuit, and RCC light adjusting circuit is connect with illuminator, RCC light modulation electricity
Road drives light.When the output power difference of RCC light adjusting circuit, the brightness of illuminator is also different, can brighten, also
It can be dimmed.Illuminator can be any type of lamps and lanterns, such as LED light etc..
Other than luminaire described in this paper, which can be applied in any type of electronics
In equipment, wherein the electronic equipment includes shell and RCC light adjusting circuit, and RCC light adjusting circuit is set in shell.The electronics
Equipment can be lighting apparatus, the motor device with illumination etc..
So far, the technical field or product type of the application of RCC light adjusting circuit are not enumerated one by one herein, it should be understood that ground
It is the content that those skilled in the art are instructed and guided according to this paper, RCC light adjusting circuit can be all made to other application transformation,
It should fall within the protection scope of the utility model.
Referring to Fig. 1, Fig. 1 is a kind of circuit principle structure frame of RCC light adjusting circuit provided by the embodiment of the utility model
Figure.As shown in Figure 1, RCC light adjusting circuit 100 includes: RCC circuit 200 and light adjusting circuit 300.
RCC circuit does not need the control of external pulse signal, and such mode is different from the power drives electricity of PWM mode control
Road.The power driving circuit of corresponding PWM mode control, switching tube always periodic on or off, adjusts output power
When, PWM mode is the pulse duty factor by changing switching tube each period, and PWM mode belongs to continuous control mode.And it is right
In RCC circuit, acyclic Switching Power Supply can be effectively applied to, pulse control process is not that LINEAR CONTINUOUS becomes
Change, when switch power source output voltage is greater than voltage rating, switching tube cut-off.Switch power source output voltage is less than voltage rating
When, switching tube conducting.
In above-mentioned each embodiment, RCC circuit can be booster circuit, drive loaded work piece with boosting mode；Alternatively,
RCC circuit can also be reduction voltage circuit, and loaded work piece is driven in a manner of being depressured；Alternatively, RCC circuit can also be lifting piezoelectricity
Road drives loaded work piece in a manner of buck.
In the present embodiment, RCC circuit 200 includes transformer 22 and switching tube 24, and transformer 22 includes primary coil
221, primary coil 221 is used to store the energy of external power supply transmitting, and transmits the energy to load, and load can be lamps and lanterns etc.
Deng.
Switching tube 24 include switch input terminal, output switching terminal and switch control terminal, light adjusting circuit 300 include sampling end,
Dim enable end and light modulation output end.The switch input terminal of switching tube 24 is connect with primary coil 221, and the switch of switching tube 24 is defeated
Outlet is connect with the sampling end of light adjusting circuit 300, and the switch control terminal of switching tube 24 and the light modulation output end of light adjusting circuit 300 connect
It connects, the light modulation enable end of the light adjusting circuit is for receiving reference voltage.
When switching tube 24 is connected, electric current can be switched by primary coil 221, light adjusting circuit 300 with sampling switch pipe 24
The first voltage of output end.It has to be noted that first voltage is to follow the turn-on time of switching tube 24 elongated and increase, example
Such as, when switching tube 24 is connected, first voltage is begun to ramp up from 0 volt, with the increase of 24 turn-on time of switching tube, first voltage
Continue to increase.When first voltage rising reaches reference voltage, 300 control switch pipe 24 of light adjusting circuit is in off state.With
This simultaneously, first voltage rises to reference voltage from 0 volt in certain time length, and transformer 22 stores one in the certain time length
Surely measure.When switching tube 24 is in off state, the energy of storage is transmitted to load by secondary coil by transformer 22.
In the present embodiment, light adjusting circuit 300 is connected or cuts according to reference voltage and first voltage, control switch pipe 24
Only, and then the output power that driving loads is adjusted.For example, when first voltage is less than reference voltage, light adjusting circuit 300 is controlled
Switching tube 24 processed is in the conductive state, and electric current flows through primary coil 221, and primary coil 221 stores certain energy.When switching tube 24
When in off state, transformer 22 by the energy transmission of storage to load, and then change load operating condition.
Further, when improving the voltage value of reference voltage, the conducting duration of switching tube 24 is relatively elongated, primary coil
221 storage more energies, and then the output power of driving load is improved, for example, improving the brightness of LED light.
When first voltage is greater than reference voltage, 300 control switch pipe 24 of light adjusting circuit is in off state, and electric current fails
Enough pass through primary coil 221.
Further, when reducing the voltage value of reference voltage, the conducting duration of switching tube 24 is opposite to shorten, primary coil
The energy of 221 storages is opposite to tail off, and then reduces the output power of driving load, for example, reducing the brightness of LED light.
In the present embodiment, reference voltage is what peripheral control unit was sent according to logic of propositions, and reference voltage can be pre-
It can also be the direct current that linear signal, such as sawtooth wave etc. obtain after rectifying and wave-filtering if the pwm signal of duty ratio
Pressure.
In the present embodiment, the electric current for flowing through primary coil 221 can accurately reflect the output power for being transferred to load
Size, switching tube 24 connect with primary coil 221, and when switching tube 24 is connected, electric current stores energy by primary coil 221
Amount, when switching tube 24 ends, electric current does not pass through primary coil 221, and releases energy to load.Also, first voltage can
Accurately reflection passes through the size of current of primary coil 221, and then, light adjusting circuit 300 is according to reference voltage and first voltage, control
The turn-on time of switching tube processed or deadline, and then the size for being transferred to the output power of load can be accurately adjusted, because
This, the degree of regulation of output power is relatively high.
In some embodiments, switching tube 24 is NMOS tube, and the drain electrode of NMOS tube is the switch input terminal of switching tube 24,
The source electrode of NMOS tube is the output switching terminal of switching tube 24, and the grid of NMOS tube is the switch control terminal of switching tube 24.
In some embodiments, referring again to Fig. 1, light adjusting circuit 300 includes: sample circuit 32 and comparison circuit 34.
The input terminal of sample circuit 32 is connect with the output switching terminal of switching tube 24, and sample circuit 32 applies for sampling
In the first voltage of the output switching terminal of switching tube.
In some embodiments, sample circuit 32 is first resistor R1, samples first voltage by first resistor R1.Its
In, the one end first resistor R1 is connect with the output switching terminal of switching tube 24, and the of the first resistor R1 other end and comparison circuit 34
One compares input terminal connection.
Comparison circuit 34 includes first comparing input terminal, second comparing input terminal and compare output end, comparison circuit 34
First compares input terminal connect with the output end of sample circuit 32, and the second of comparison circuit 34 compares input terminal for receiving base
The comparison output end of quasi- voltage, comparison circuit 34 is connect with the switch control terminal of switching tube 24, and comparison circuit 34 is used for according to base
Quasi- voltage and first voltage, 24 on or off of control switch pipe.
For example, when reference voltage is less than first voltage, the output end of comparison circuit 34 exports low level, so that opening
Pipe 24 is closed to end.When reference voltage is greater than first voltage, the output end of comparison circuit 34 exports high level, so that switching tube 24
Conducting.
In some embodiments, referring to Fig. 2, comparison circuit 34 include: comparator 342, signal conditioning circuit 344 and every
From circuit 346.
The inverting input terminal of comparator 342 is connect with the output end of sample circuit 32.
The input terminal of signal conditioning circuit 344 for receiving reference voltage, the output end of signal conditioning circuit 344 with than
Non-inverting input terminal compared with device 342 connects.Signal conditioning circuit 344 can improve reference voltage, so that the work of comparison circuit 34 is more
Add reliable.For example, in some embodiments, signal conditioning circuit 344 is filter circuit, and the input terminal of filter circuit is for receiving
The output end of reference voltage, filter circuit is connect with the non-inverting input terminal of comparator 342, filter circuit can to reference voltage into
Row filtering processing, reduces harmonic constant, obtains stable DC reference voltage.
In some embodiments, signal conditioning circuit 344 can also include other conditioning circuits, such as amplifying circuit etc.
Deng.
The input terminal of isolation circuit 346 is connect with the output end of comparator 342, the output end and switch of isolation circuit 346
The switch control terminal of pipe 24 connects, and when comparator 342 exports high level, high level is isolated in isolation circuit 346, therefore, switch
Pipe 24 can be connected according to the normally logic of RCC circuit.When comparator 342 exports low level, isolation circuit 346 will
The switch control terminal of switching tube 24 is pulled to low level.
In some embodiments, isolation circuit 346 is diode, wherein the switch of the anode and switching tube 24 of diode
Control terminal connection, the cathode of diode are connect with the output end of comparator 342.
In order to which RCC light adjusting circuit provided herein is understood in detail, Fig. 3 and Fig. 4 is combined to elaborate RCC tune herein
The working principle of optical circuit.Fig. 3 and Fig. 4 are please referred to, wherein the feedback loop of RCC circuit can be realized by capacitor, can also be with
It is realized by common chip:
Herein, switching tube 24 is NMOS tube Q1, and Q1 may be NPN triode.The primary coil 221 of transformer 22 is
Coil L1, sample circuit 32 are first resistor R1, and isolation circuit 346 is diode D1, and resistance R2 is in parallel with resistance R3, first
The voltage of node A1 is first voltage.
First resistor R1 samples the first voltage for being applied to first node A1, and feeds back to the anti-phase input of comparator 342
End.
Peripheral control unit sends the reference voltage of PWM type, which is applied to comparator after filtering processing
342 non-inverting input terminal.Wherein, the duty ratio of the reference voltage is adjustable.
When voltage in place of the grid of NMOS tube Q1 is high potential, Q1 conducting, then, electric current passes through coil L1.When
When voltage in place of the grid of NMOS tube Q1 is low potential, Q1 cut-off, then, electric current is had not been able to through coil L1.
In this example, it is assumed that peripheral control unit sends the pwm signal that duty ratio is 40%, and pwm signal is as base
Quasi- voltage.When initial, Q1 conducting, also, first voltage is less than DC reference voltage of the pwm signal after being filtered, then,
The output end of comparator 342 exports high level, and due to the buffer action of diode D1, the current potential of the grid of Q1 is still high electricity
Position, therefore, Q1 is still connected.
When first voltage is greater than DC reference voltage of the pwm signal after being filtered, in the present embodiment, comparator
342 comparison speed is fast, and precision is relatively high.Then, the output end of comparator 342 exports low level, at this point, diode D1 is led
Logical, then, the current potential of the grid of Q1 is pulled to low potential, and therefore, Q1 cut-off, electric current has not been able to through coil L1.
In another embodiment, it is assumed that peripheral control unit sends the pwm signal that duty ratio is 30%, and working principle is as above
One embodiment.The distinctive points of itself and a upper embodiment are that DC reference voltage of the pwm signal after being filtered becomes smaller, because
And it is smaller than the output power of a upper embodiment according to the output power of the present embodiment, when load is LED light, the present embodiment
LED light is dimmed.
The electric current for flowing through primary coil can accurately reflect the size for being transferred to the output power of load, switching tube and just
Grade coil connection, in switching tube conducting, electric current is by primary coil, and in switching tube cut-off, electric current does not pass through primary coil.
Also, first voltage can accurately reflect the size of current by primary coil, then, light adjusting circuit according to reference voltage with
First voltage, the turn-on time of control switch pipe or deadline, and then can accurately adjust the output work for being transferred to LED light
The size of rate, therefore, the degree of regulation of output power are relatively high, and realize dimming function, electricity using common RCC circuit
Line structure is simple, low in cost.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Under the thinking of the utility model, it can also be combined between the technical characteristic in above embodiments or different embodiments,
Step can be realized with random order, and there are many other variations of the different aspect of the utility model as described above, be
Simplicity, they do not provide in details；Although the utility model is described in detail with reference to the foregoing embodiments, this
The those of ordinary skill in field it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments,
Or equivalent replacement of some of the technical features；And these are modified or replaceed, and do not make the sheet of corresponding technical solution
Matter is detached from the range of each embodiment technical solution of the application.
Claims (9)
1. a kind of RCC light adjusting circuit characterized by comprising
RCC circuit, including transformer and switching tube, the switching tube include switch input terminal, output switching terminal and switch control
End, the transformer includes primary coil, and the switch input terminal of the switching tube is connect with the primary coil of the transformer,
When the switching tube is connected, electric current is by the primary coil, and in switching tube cut-off, electric current does not pass through the primary line
Circle；
Light adjusting circuit, including sampling end, light modulation enable end and light modulation output end；The sampling end of the light adjusting circuit and the switch
The output switching terminal of pipe connects, for sampling the first voltage for being applied to the output switching terminal of the switching tube；The light modulation electricity
The light modulation enable end on road is for receiving reference voltage；The switch control of the light modulation output end and the switching tube of the light adjusting circuit
End connection, the light adjusting circuit are used to control the switching tube conducting according to the reference voltage and the first voltage or cut
Only.
2. RCC light adjusting circuit according to claim 1, which is characterized in that the light adjusting circuit includes:
Sample circuit, the input terminal of the sample circuit are connect with the output switching terminal of the switching tube, are applied to for sampling
The first voltage of the output switching terminal of the switching tube；
Comparison circuit, including first compare input terminal, second compare input terminal and compare output end, the first of the comparison circuit
Compare input terminal to connect with the output end of the sample circuit, the second of the comparison circuit compares input terminal for receiving benchmark
The comparison output end of voltage, the comparison circuit is connect with the switch control terminal of the switching tube, and the comparison circuit is used for root
According to the reference voltage and the first voltage, the switching tube on or off is controlled.
3. RCC light adjusting circuit according to claim 2, which is characterized in that the comparison circuit includes:
Comparator, the inverting input terminal of the comparator are connect with the output end of the sample circuit；
Signal conditioning circuit, the input terminal of the signal conditioning circuit are used to receive reference voltage, the signal conditioning circuit
Output end is connect with the non-inverting input terminal of the comparator；
Isolation circuit, the input terminal of the isolation circuit are connect with the output end of the comparator, the output of the isolation circuit
End is connect with the switch control terminal of the switching tube, when the comparator exports high level, described in the isolation circuit isolation
High level, when the comparator exports low level, the switch control terminal of the switching tube is pulled to described by the isolation circuit
Low level.
4. RCC light adjusting circuit according to claim 3, which is characterized in that the signal conditioning circuit includes filter circuit,
For the input terminal of the filter circuit for receiving reference voltage, the output end of the filter circuit is same mutually defeated with the comparator
Enter end connection.
5. RCC light adjusting circuit according to claim 3, which is characterized in that the isolation circuit includes diode, and described two
The anode of pole pipe is connect with the switch control terminal of the switching tube, and the output end of the cathode of the diode and the comparator connects
It connects.
6. RCC light adjusting circuit according to claim 2, which is characterized in that the sample circuit includes first resistor, described
First resistor one end is connect with the output switching terminal of the switching tube, and the of the first resistor other end and the comparison circuit
One compares input terminal connection.
7. RCC light adjusting circuit according to any one of claims 1 to 6, which is characterized in that the reference voltage is PWM letter
Number or sawtooth signal.
8. RCC light adjusting circuit according to any one of claims 1 to 6, which is characterized in that the switching tube is NMOS tube,
The drain electrode of the NMOS tube is the switch input terminal of the switching tube, and the source electrode of the NMOS tube is that the switch of the switching tube is defeated
Outlet, the grid of the NMOS tube are the switch control terminal of the switching tube.
9. a kind of luminaire, which is characterized in that dimmed including illuminator and RCC as claimed in any one of claims 1 to 8
Circuit, the transformer further include secondary coil, and the RCC light adjusting circuit is connected by the secondary coil and the illuminator
It connects, powers for the illuminator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821048456.5U CN208424857U (en) | 2018-06-29 | 2018-06-29 | A kind of RCC light adjusting circuit and luminaire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821048456.5U CN208424857U (en) | 2018-06-29 | 2018-06-29 | A kind of RCC light adjusting circuit and luminaire |
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| Publication Number | Publication Date |
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| CN208424857U true CN208424857U (en) | 2019-01-22 |
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| CN201821048456.5U Active CN208424857U (en) | 2018-06-29 | 2018-06-29 | A kind of RCC light adjusting circuit and luminaire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582968A (en) * | 2023-07-12 | 2023-08-11 | 无锡安特源科技股份有限公司 | Dimming circuit |
-
2018
- 2018-06-29 CN CN201821048456.5U patent/CN208424857U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582968A (en) * | 2023-07-12 | 2023-08-11 | 无锡安特源科技股份有限公司 | Dimming circuit |
| CN116582968B (en) * | 2023-07-12 | 2023-09-22 | 无锡安特源科技股份有限公司 | Dimming circuit |
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Effective date of registration: 20230221 Address after: 1010-1011, 10 / F, block D, Shenzhen Aerospace Science and Technology Innovation Research Institute building, no.6, Keji south 10 road, high tech South Zone, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN H&T INTELLIGENT CONTROL Co.,Ltd. Address before: 518000 4 / F, R & D building, heertai Industrial Park, Genyu Road, mold base, Gongming street, Guangming New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN H&T INTELLIGENT LIGHTING Co.,Ltd. |