CN102695324A - Light source module power supply system - Google Patents
Light source module power supply system Download PDFInfo
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- CN102695324A CN102695324A CN2011100737372A CN201110073737A CN102695324A CN 102695324 A CN102695324 A CN 102695324A CN 2011100737372 A CN2011100737372 A CN 2011100737372A CN 201110073737 A CN201110073737 A CN 201110073737A CN 102695324 A CN102695324 A CN 102695324A
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- light source
- source module
- electric power
- power system
- isolating transformer
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Abstract
A light source module power supply system is electrically connected with a light emitting diode. The light source module power supply system comprises one alternative current/direct current conversion circuit. The alternative current/direct current conversion circuit is used to convert the input alternative current into the direct current. The light source module power supply system also comprises a first conversion circuit, a first isolation transformer and a first rectifier. The first conversion circuit, the first isolation transformer and the first rectifier are successively connected in series with the alternative current/direct current conversion circuit. The first conversion circuit is used to convert the direct current output by the alternative current/direct current conversion circuit into the high-frequency alternative current. The first isolation transformer is used to carry out voltage transformation on the high-frequency alternative current output by the first conversion circuit so that the current is turned into a voltage which is suitable for the light emitting diode. The first rectifier is used to convert an alternative current signal output by the first isolation transformer into a direct current signal and output to the light emitting diode. By using the above structure, loss of voltage conversion can be reduced and usage efficiency of electric energy can be increased.
Description
Technical field
The present invention relates to a kind of electric power system, particularly a kind of light source module electric power system.
Background technology
The electric power system of display led module backlight comprises power supply unit (Power Supply Unit) and direct current transducer.Power supply unit is used for converting alternating current to galvanic current 12V and 5V, uses to the LED-backlit module so that power supply to be provided.Direct current transducer is used to regulate the size of current of supplying with the LED-backlit module.When the display model was different, the quantity of the LED lamp bar that the LED-backlit module is adopted was also inequality, and direct current transducer also needs different input voltages simultaneously.Usually power supply unit has only several normal voltages outputs, when the normal voltage that provides when the operating voltage and the power supply unit of direct current transducer does not match, the normal voltage that need power supply unit be provided once more transformation to satisfy the voltage requirements of direct current transducer.Yet through the ac/dc conversion, these two step of converting of direct current transformation, the utilization ratio of electric energy will reduce greatly.
Summary of the invention
In view of this, be necessary to provide a kind of light source module electric power system that improves utilization of power efficient.
A kind of light source module electric power system, it is electrically connected on a light-emitting diode, and said light source module electric power system comprises an AC/DC transfer circuit, and said AC/DC transfer circuit is used for converting the alternating current of input to direct current.Said light source module electric power system also comprises one first change-over circuit, first isolating transformer and first rectifier; Said first change-over circuit, first isolating transformer and first rectifier are series at said AC/DC transfer circuit successively; Said first change-over circuit is used for the direct current of said AC/DC transfer circuit output is changed into high-frequency alternating current; Said first isolating transformer is used for the high-frequency alternating current transformation one-tenth of said first change-over circuit output is applicable to the voltage of said light-emitting diode; Said first rectifier is used for converting the AC signal of said first isolating transformer output to direct current signal, exports to said light-emitting diode.
Said light source module electric power system utilizes said first isolating transformer high-frequency alternating current transformation of said first change-over circuit output to be become to be applicable to the voltage of said light-emitting diode; Reduce the loss of voltage transitions through the voltage transformation of an exchange way, improve the service efficiency of electric energy.
Description of drawings
Fig. 1 is the sketch map of light source module electric power system first execution mode of the present invention.
Fig. 2 is the sketch map of light source module electric power system second execution mode of the present invention.
Fig. 3 is the sketch map of light source module electric power system the 3rd execution mode of the present invention.
Fig. 4 is the sketch map of light source module electric power system the 4th execution mode of the present invention.
Fig. 5 is the sketch map of light source module electric power system the 5th execution mode of the present invention.
Fig. 6 is the sketch map of light source module electric power system the 6th execution mode of the present invention.
Fig. 7 is the sketch map of light source module electric power system the 7th execution mode of the present invention.
Fig. 8 is the sketch map of light source module electric power system the 8th execution mode of the present invention.
The main element symbol description
| Light source module electric power system | 100、200、300、400、500、600、700、800 |
| Power-supply unit | 10、210、310、410、510 |
| The AC/DC transfer circuit | 110 |
| The EMI circuit | 11、311、511 |
| Power factor correction circuit | 12、312、512 |
| Inductance | L1 |
| Diode | D1 |
| Electric capacity | C1 |
| First metal-oxide-semiconductor | M1 |
| First change-over circuit | 13、313、513 |
| Second metal-oxide-semiconductor | M2 |
| The 3rd metal-oxide-semiconductor | M3 |
| Second change-over circuit | 14 |
| The 4th metal-oxide-semiconductor | M4 |
| The 5th metal-oxide-semiconductor | M5 |
| First isolating transformer | 15、321、514 |
| First primary coil | 15a、321a、421a、514a |
| First secondary coil | 15b、514b |
| Second isolating transformer | 16、314、516 |
| Second primary coil | 16a、415a |
| The second subprime coil | 16b、314b |
| Second rectifier | 17、317、517 |
| Direct current transducer | 20、220、320、420、520 |
| First rectifier | 21、222、322、622 |
| LED drive | 22 |
| From |
221 |
| From primary coil | 221a、521a |
| From |
221b、321b |
| First circuit board | 30 |
| Second circuit board | 40 |
| The |
50 |
| Light- |
90 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
See also Fig. 1, the light source module electric power system 100 that first embodiment of the invention provides.This light source module electric power system 100 is light-emitting diode 90 power supplies.
Said light source module electric power system 100 comprises power-supply unit 10 and direct current transducer 20.Said power-supply unit 10 is installed on the first circuit board 30, and said direct current transducer 20 and said light-emitting diode 90 are installed on the second circuit board 40.
Said power-supply unit 10 comprises AC/DC transfer circuit 110, first change-over circuit 13, second change-over circuit 14, first isolating transformer 15, second isolating transformer 16 and second rectifier 17.
Said AC/DC transfer circuit 110 is used for converting the alternating current of input to direct current.In this execution mode, said AC/DC transfer circuit 110 comprises EMI circuit 11 and power factor correction circuit (abbreviation pfc circuit) 12.
Said EMI circuit 11 is used for the interference of the high-frequency impulse of the extraneous electrical network of filtering to power supply.In this execution mode, said EMI circuit 11 is the EMI filter circuit of Switching Power Supply commonly used, and this EMI circuit 11 can adopt one-level or two-stage EMI filter circuit.
Said pfc circuit 12 is electrically connected with said EMI circuit 11.This pfc circuit 12 is used to carry out Active PFC.In this execution mode, said pfc circuit 12 comprises inductance L 1, diode D1, capacitor C 1 and the first metal-oxide-semiconductor M1.One end of said inductance L 1 is connected with the output cathode of said EMI circuit 11, and the other end of inductance L 1 is connected with the drain electrode of the first metal-oxide-semiconductor M1.The source electrode of the first metal-oxide-semiconductor M1 is connected in the output negative pole of said EMI circuit 11, and the grid of the first metal-oxide-semiconductor M1 is controlled by a control chip (figure does not show).The positive pole of said diode D1 is connected in the junction of said inductance L 1 and said first metal-oxide-semiconductor M1 drain electrode.The negative pole of diode D1 is connected in said capacitor C 1.The two ends of capacitor C 1 connect the negative pole of negative pole and said EMI circuit 11 of diode D1 respectively as the positive and negative output of pfc circuit.
Said first change-over circuit 13 is used for the direct current of said AC/DC transfer circuit 110 outputs is changed into high-frequency alternating current.In this execution mode, said first change-over circuit 13 is connected in said pfc circuit 12, and the electrical signal conversion that is used for said pfc circuit 12 outputs is first AC signal.In this execution mode, said first change-over circuit 13 is a chopper.Said first change-over circuit 13 comprises the second metal-oxide-semiconductor M2 and the 3rd metal-oxide-semiconductor M3.The drain electrode of the said second metal-oxide-semiconductor M2 is connected in the cathode output end of said pfc circuit 12, and the source electrode of the said second metal-oxide-semiconductor M2 is connected in the drain electrode of said the 3rd metal-oxide-semiconductor M3, and the source electrode of the said second metal-oxide-semiconductor M2 is connected in the cathode output end of said pfc circuit 12.Said second metal-oxide-semiconductor M2 and said the 3rd metal-oxide-semiconductor M3 grid all be controlled by a control chip (figure do not show).The junction of said second metal-oxide-semiconductor M2 source electrode and said the 3rd metal-oxide-semiconductor M3 drain electrode is as the cathode output end of said first change-over circuit 13, and the source electrode of said the 3rd metal-oxide-semiconductor M3 is as the cathode output end of said first change-over circuit 13.
Said first isolating transformer 15 comprises the first primary coil 15a and the first secondary coil 15b that intercouples.The two ends of the said first primary coil 15a are connected in the positive and negative electrode output of said first change-over circuit 13.According to the input voltage of said direct current transducer 20 needs, the number of turn that changes the said first primary coil 15a and the first secondary coil 15b recently satisfies the power demands of varying number light-emitting diode 90.Utilize said first isolating transformer 15 to carry out AC transformation, can reduce the loss of electric energy, improve the usefulness of utilizing of electric energy compared to direct current transformation.
Said second change-over circuit 14 is parallel to said pfc circuit 12 with said first change-over circuit 13, and said second change-over circuit 14 is basic identical with said first change-over circuit 13.Said second change-over circuit 14 comprises the 4th metal-oxide-semiconductor M4 and the 5th metal-oxide-semiconductor M5.The source ground of said the 5th metal-oxide-semiconductor M5.The junction of said the 4th metal-oxide-semiconductor M4 source electrode and said the 5th metal-oxide-semiconductor M5 drain electrode is as the cathode output end of said second change-over circuit 14, and the source electrode of said the 5th metal-oxide-semiconductor M5 is as the cathode output end of said second change-over circuit 14.
Said second isolating transformer 16 comprises the second primary coil 16a and the second subprime coil 16b that intercouples.The two ends of the said second primary coil 16a are connected in the positive and negative electrode output of said second change-over circuit 14.The two ends of said second subprime coil 16b are as the positive and negative electrode output of said power-supply unit 10.
Said second subprime coil 16b is electrically connected on said second rectifier 17.Said second rectifier 17 is used for rectification and the many groups of output direct current signal.Said EMI circuit 11, pfc circuit 12, second change-over circuit 14, second isolating transformer 16 and second rectifier 17 are equivalent to an existing Switching Power Supply.
In this execution mode, said direct current transducer 20 comprises first rectifier 21 and LED drive 22.Said first rectifier 21 is electrically connected with the two ends of the first secondary coil 15b.Said first rectifier 21 is used for rectification and exports direct current signal.Said LED drive 22 is electrically connected with said first rectifier 21, is used to drive said light-emitting diode 90.
See also Fig. 2, light source module electric power system 200 and the light source module electric power system 100 in first execution mode that second embodiment of the invention provides are basic identical.Said light source module electric power system 200 comprises power-supply unit 210 and direct current transducer 220.The structure of power-supply unit 210 is identical with the structure of power-supply unit 10, and said direct current transducer 120 comprises from the transformer 221 and first rectifier 222.Saidly be used for lifting/voltage reducing second AC signal and export the 3rd AC signal from transformer 221.Utilize and saidly carry out AC transformation, can reduce the loss of electric energy, improve the usefulness of utilizing of electric energy compared to direct current transformation from transformer 221.In this execution mode, saidly be used for step-down second AC signal from transformer 221.Reach from secondary coil 221b said comprising from primary coil 221a from transformer 221.Said two ends from primary coil 221a are electrically connected on the positive and negative electrode output of said power-supply unit 10 respectively.Said two ends from secondary coil 221b are electrically connected on said first rectifier 222.Said first rectifier 222 is connected in said between secondary coil 221b and the said light-emitting diode 90, is said light-emitting diode 90 power supplies.Certainly, also can be connected a LED drive between said first rectifier 222 and the said light-emitting diode 90.
See also Fig. 3, the light source module electric power system 300 that third embodiment of the invention provides comprises power-supply unit 310 and direct current transducer 320.Said power-supply unit 310 comprises successively the EMI circuit 311 that connects, power factor correction circuit 312, first change-over circuit 313, second isolating transformer 314 and second rectifier 317.Said direct current transducer 320 comprises first isolating transformer 321 and first rectifier 322.The two ends of the first primary coil 321a of said first isolating transformer 321 are electrically connected on the two ends of the second subprime coil 314b of said second isolating transformer 314 respectively.
See also Fig. 4, light source module electric power system 400 and the light source module electric power system 300 in the 3rd execution mode that four embodiment of the invention provides are basic identical, and said light source module electric power system 400 comprises power-supply unit 410 and direct current transducer 420.Its difference is: the two ends of the first primary coil 421a of said direct current transducer 420 are electrically connected on the two ends of the second primary coil 415a of said power-supply unit 410 respectively.
See also Fig. 5, the light source module electric power system 500 that fifth embodiment of the invention provides comprises power-supply unit 510 and direct current transducer 520 equally.Said power-supply unit 510 comprises successively the EMI circuit 511 that connects, power factor correction circuit 512, first change-over circuit 513, second isolating transformer 516 and second rectifier 517.Said power-supply unit 510 also comprises first isolating transformer 514.The two ends of the first primary coil 514a of said first isolating transformer 514 are connected in the positive and negative electrode output of said first change-over circuit 513.The two ends from primary coil 521a of said direct current transducer 520 are electrically connected on the two ends of the first secondary coil 514b of said first isolating transformer 514 respectively.
See also Fig. 6, light source module electric power system 600 and the light source module electric power system 200 in second execution mode that sixth embodiment of the invention provides are basic identical.Its difference is, all circuit of said light source module electric power system 600 all are integrated in to be formed high pressure liquid crystal display set and become power supply (LCD Integrated Power Supply is abbreviated as LIPS) on the tertiary circuit plate 50.Certainly, can also connect a LED drive between first rectifier 622 of said light source module electric power system 600 and the said light-emitting diode 90.
See also Fig. 7, light source module electric power system 700 and the light source module electric power system 300 in the 3rd execution mode that seventh embodiment of the invention provides are basic identical.Its difference is, all circuit of said light source module electric power system 700 all are integrated in to be formed high pressure liquid crystal display set and become power supply on the tertiary circuit plate 50.
See also Fig. 8, light source module electric power system 800 and the light source module electric power system 500 in the 5th execution mode that eighth embodiment of the invention provides are basic identical.Its difference is, all circuit of said light source module electric power system 800 all are integrated in to be formed high pressure liquid crystal display set and become power supply on the tertiary circuit plate 50.
Said light source module electric power system utilizes said first isolating transformer high-frequency alternating current transformation of said first change-over circuit output to be become to be applicable to the voltage of said light-emitting diode; Reduce the loss of voltage transitions through the voltage transformation of an exchange way, improve the service efficiency of electric energy.
It is understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection range that all should belong to claim of the present invention with distortion.
Claims (10)
1. light source module electric power system; It is electrically connected on a light-emitting diode; Said light source module electric power system comprises an AC/DC transfer circuit; Said AC/DC transfer circuit is used for converting the alternating current of input to direct current; It is characterized in that said light source module electric power system also comprises one first change-over circuit, first isolating transformer and first rectifier, said first change-over circuit, first isolating transformer and first rectifier are series at said AC/DC transfer circuit successively; Said first change-over circuit is used for the direct current of said AC/DC transfer circuit output is changed into high-frequency alternating current; Said first isolating transformer is used for the high-frequency alternating current transformation one-tenth of said first change-over circuit output is applicable to the voltage of said light-emitting diode, and said first rectifier is used for converting the AC signal of said first isolating transformer output to direct current signal, exports to said light-emitting diode.
2. light source module electric power system as claimed in claim 1; It is characterized in that; Said light source module electric power system comprises one second change-over circuit, one second isolating transformer and one second rectifier, said second change-over circuit; Said second isolating transformer and said second rectifier are series at said AC/DC transfer circuit successively; Said second change-over circuit is parallelly connected with said first change-over circuit, and said second change-over circuit is used for the direct current of said AC/DC transfer circuit output is changed into high-frequency alternating current, and said second isolating transformer is used for the high-frequency alternating current transformation one-tenth of said second change-over circuit output is applicable to the voltage of other electronic components; Said second rectifier is used for converting the AC signal of said second isolating transformer output to direct current signal, exports to other electronic components.
3. light source module electric power system as claimed in claim 2; It is characterized in that; Said light source module electric power system also comprises one from transformer; Saidly be connected between said first isolating transformer and said first rectifier, be used for the AC signal of said first isolating transformer output of lifting/voltage reducing from transformer.
4. light source module electric power system as claimed in claim 1; It is characterized in that; Said light source module electric power system also comprises second isolating transformer; Said second isolating transformer is used for the high-frequency alternating current transformation with said first change-over circuit output, and said first isolating transformer is used for the high-frequency alternating current transformation one-tenth of said second isolating transformer output is applicable to the voltage of said light-emitting diode.
5. light source module electric power system as claimed in claim 4; It is characterized in that; Said light source module electric power system AC/DC transfer circuit, said first change-over circuit and said second isolating transformer are arranged on the first circuit board, and said first isolating transformer and said first rectifier are arranged on the second circuit board.
6. light source module electric power system as claimed in claim 1; It is characterized in that; Said light source module electric power system comprises second isolating transformer and second rectifier; Said second isolating transformer and said second rectifier are series at said first change-over circuit successively, and said second isolating transformer is parallelly connected with said first isolating transformer, and said second isolating transformer is used for the high-frequency alternating current transformation one-tenth of said first change-over circuit output is applicable to the voltage of other electronic components; Said second rectifier is used for converting the AC signal of said second isolating transformer output to direct current signal, exports to other electronic components.
7. light source module electric power system as claimed in claim 6 is characterized in that, said light source module electric power system comprises one from transformer, saidly is series between said first isolating transformer and said first rectifier from transformer.
8. light source module electric power system as claimed in claim 6; It is characterized in that; Said light source module electric power system AC/DC transfer circuit, said first change-over circuit and said second isolating transformer are arranged on the first circuit board, and said first isolating transformer and said first rectifier are arranged on the second circuit board.
9. light source module electric power system as claimed in claim 1 is characterized in that, said light source module electric power system is arranged on the circuit board.
10. light source module electric power system as claimed in claim 1; It is characterized in that; Said light source module electric power system AC/DC transfer circuit, first change-over circuit and first isolating transformer are arranged on the first circuit board, and said first rectifier is arranged on the second circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100737372A CN102695324A (en) | 2011-03-25 | 2011-03-25 | Light source module power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100737372A CN102695324A (en) | 2011-03-25 | 2011-03-25 | Light source module power supply system |
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| Publication Number | Publication Date |
|---|---|
| CN102695324A true CN102695324A (en) | 2012-09-26 |
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ID=46860562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100737372A Pending CN102695324A (en) | 2011-03-25 | 2011-03-25 | Light source module power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102695324A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030165068A1 (en) * | 2001-04-06 | 2003-09-04 | Shinzo Tomonaga | Dc-dc power supply |
| CN101163361A (en) * | 2006-10-11 | 2008-04-16 | 鸿富锦精密工业（深圳）有限公司 | Light source driving device |
| CN101753042A (en) * | 2010-02-10 | 2010-06-23 | 浪潮(北京)电子信息产业有限公司 | Distributed power supply system |
| CN101814843A (en) * | 2009-02-20 | 2010-08-25 | 国琏电子（上海）有限公司 | Power supply system |
-
2011
- 2011-03-25 CN CN2011100737372A patent/CN102695324A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030165068A1 (en) * | 2001-04-06 | 2003-09-04 | Shinzo Tomonaga | Dc-dc power supply |
| CN101163361A (en) * | 2006-10-11 | 2008-04-16 | 鸿富锦精密工业（深圳）有限公司 | Light source driving device |
| CN101814843A (en) * | 2009-02-20 | 2010-08-25 | 国琏电子（上海）有限公司 | Power supply system |
| CN101753042A (en) * | 2010-02-10 | 2010-06-23 | 浪潮(北京)电子信息产业有限公司 | Distributed power supply system |
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Application publication date: 20120926 |