CN201657422U - Light-emitting diode light source system and voltage-regulating system thereof - Google Patents
Light-emitting diode light source system and voltage-regulating system thereof Download PDFInfo
- Publication number
- CN201657422U CN201657422U CN2010201472401U CN201020147240U CN201657422U CN 201657422 U CN201657422 U CN 201657422U CN 2010201472401 U CN2010201472401 U CN 2010201472401U CN 201020147240 U CN201020147240 U CN 201020147240U CN 201657422 U CN201657422 U CN 201657422U
- Authority
- CN
- China
- Prior art keywords
- voltage
- emitting diode
- light
- detecting
- arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a light-emitting diode light source system and a voltage-regulating system thereof. The light-emitting diode light source system comprises a light-emitting diode device, a power supply device, at least one detecting device and at least one voltage-regulating device. The light-emitting diode device is provided with at least one voltage when being conducted. The power supply device provides direct-current voltage to the high-voltage end of the light-emitting diode device, and the direct-current voltage is a constant value. The at least one detecting device is electrically connected with the lower-voltage end of the light-emitting diode device, and used for detecting the operating voltage of the lower-voltage end, and generating a detecting result. The at least one voltage-regulating device is respectively and electrically connected with the low-voltage end of the light-emitting diode device and the detecting device, and the detecting result adjusts at least one compensating voltage between the low voltage end and the earthing end of the light-emitting diode, wherein when the adjusted compensating voltage is added on the light-emitting diode device and conducted, the voltage is equal to the direct voltage. The light-emitting diode light source system can solve the heat-dissipation problem.
Description
Technical field
The utility model is about a kind of LED light source system and voltage-regulating system thereof, particularly in order to cooperate the voltage-regulating system of light-emitting diode.
Background technology
Along with the development in science and technology progress, various in recent years commercializations, family expenses and individual's electronic product is universal all day by day.Except function and outward appearance, the power consumption of product also is subjected to suitable attention.The power consumption that how to reduce electronic product is the subject under discussion that many product designers and manufacturer pay close attention to; Many standard criterions of formulating at this subject under discussion have been arranged at present.
See also Figure 1A, Figure 1A is the schematic diagram of known LED source and electric power system thereof.The voltage conversion circuit 12 responsible alternating voltage V that commercial power supply port one 0 is provided
ACConversion also is adjusted into light emitting diode 14 needed direct voltages.Concerning LED light source system, the direct voltage V of voltage conversion circuit 12 outputs
DCBe generally definite value.
Yet in the practical application, each light-emitting diode needed voltage when shinny may all be not quite similar in the light emitting diode 14.All having in order to ensure each light-emitting diode is enough to fully shinny voltage, the direct voltage V that voltage conversion circuit 12 provides
DCUsually can be designed to be higher than the in fact voltage requirements of light emitting diode 14.
Shown in Figure 1B, prior art can be provided with detecting unit 16 and step-up/down (boost/buck) unit 18 mostly.Detecting unit 16 is respectively gone here and there the voltage of light-emitting diode end (low-pressure end) in order to detecting, and judges how to adjust voltage adjusting device 18 according to this voltage.Voltage adjusting device 18 is set at the direct voltage V that voltage conversion circuit 12 provides
DCAnd between light-emitting diode, be responsible for being respectively and respectively go here and there the light-emitting diode voltage that affords redress, regulate by this and respectively go here and there the voltage that light-emitting diode bore.
Yet owing to approach voltage conversion circuit 12 in circuit framework, the voltage adjusting device 18 in the prior art must bear sizable electric current and voltage, quite power consumption usually, and its volume is also quite huge.Therefore, with respect to pursuing energy-conservation and light-weighted product trend now, the employing circuit framework shown in Figure 1B is more unfavorable.
The utility model content
At above-mentioned technical problem, be LED light source system according to an embodiment of the present utility model, wherein comprise light-emitting diode assembly, supply unit, at least one arrangement for detecting and at least one voltage adjusting device.Has at least one voltage during the light-emitting diode assembly conducting.Supply unit is electrically connected on the high-pressure side of light-emitting diode, and this supply unit provides the high-pressure side of direct voltage to this light-emitting diode assembly, and this direct voltage is a definite value.At least one arrangement for detecting is electrically connected on the low-pressure end of light-emitting diode assembly, and this arrangement for detecting is detected the operating voltage of this low-pressure end of this light-emitting diode assembly, and produces the detecting result.At least one voltage adjusting device is electrically connected the low-pressure end and the arrangement for detecting of light-emitting diode assembly respectively, and this voltage adjusting device is adjusted this low-pressure end of light-emitting diode and at least one bucking voltage between earth terminal according to the detecting result.Voltage when wherein, adjusted bucking voltage adds this light-emitting diode assembly conducting equals this direct voltage.
Described light-emitting diode assembly comprises the light-emitting diode that plural groups connects with series system.
Described LED light source system comprises a plurality of arrangement for detecting and a plurality of voltage adjusting device, and each group light-emitting diode is separately corresponding to this arrangement for detecting and this voltage adjusting device.
Described arrangement for detecting comprises voltage comparator, and second input of this voltage comparator is in order to receive reference voltage.
Described voltage adjusting device comprises booster circuit or reduction voltage circuit.
Described supply unit is in order to receiving alternating voltage, and this alternating voltage is converted to this direct voltage.
According to another embodiment of the present utility model is in order to cooperate the voltage-regulating system of LED source, wherein comprise at least one arrangement for detecting, be electrically connected on the low-pressure end of this light-emitting diode assembly, this arrangement for detecting is detected the operating voltage of this low-pressure end of this light-emitting diode assembly, and produces the detecting result; And at least one voltage adjusting device, being electrically connected this low-pressure end and this arrangement for detecting of this light-emitting diode assembly respectively, this voltage adjusting device is adjusted this low-pressure end of this light-emitting diode and at least one bucking voltage between earth terminal according to this detecting result; Wherein, has at least one voltage during this light-emitting diode assembly conducting, the high-pressure side of this light-emitting diode assembly is in order to receive direct voltage, and this direct voltage is a definite value, and this voltage when this adjusted bucking voltage adds this light-emitting diode assembly conducting equals this direct voltage.
The utility model provides a kind of new framework for the voltage-regulating system of LED source.By voltage adjusting device being arranged between light-emitting diode assembly and the earth terminal, can effectively reducing the power consumption of diode light source system integral body according to voltage-regulating system of the present utility model, and then reduce the heat dissipation problem of LED light source system.Can be widely used in the electronic product of various employing light-emitting diodes as light source according to voltage-regulating system of the present utility model.Can be further understood by following embodiment detailed description and description of drawings about advantage of the present utility model and spirit.
Description of drawings
Figure 1A and Figure 1B are the schematic diagram of known LED source and electric power system thereof.
Fig. 2 A and Fig. 2 B illustrate the schematic diagram according to the LED light source system in first embodiment of the present utility model.
Fig. 2 C is the schematic diagram of the LED light source system of another embodiment of the present utility model.
Embodiment
See also Fig. 2 A, Fig. 2 A illustrates the schematic diagram according to the LED light source system in first embodiment of the present utility model.Shown in Fig. 2 A, LED light source system 20 comprises supply unit 22, light-emitting diode assembly 24, arrangement for detecting 26, and voltage adjusting device 28.In practical application, light-emitting diode assembly 24 can comprise one or more groups light-emitting diode that connects with series system, but not as limit.In addition, in practical application, voltage adjusting device 28 can adopt boost (boost) circuit or step-down (buck) circuit according to design requirement.
In this execution mode, the alternating voltage V that is provided by commercial power supply port 10 is provided supply unit 22
AC Supply unit 22 is responsible for alternating voltage V
ACBe converted to direct voltage V
DC, and with this direct voltage V
DCOffer the high-pressure side of light-emitting diode assembly 24.In brief, supply unit 22 is mainly in order to provide the effect of ac/dc conversion.Direct voltage V
DCHeight decide according to the demand of light-emitting diode assembly 24, and be roughly definite value.
In the practical application, supply unit 22 can comprise assemblies such as rectifier (rectifier), power factor correction circuit, DC-DC converter.For example, DC-DC converter in the supply unit 22 can be plug-type (push-pull) transducer, full-bridge type (full-bridge) transducer, semibridge system (half-bridge) transducer or flyback (flyback) transducer, but not as limit.
Arrangement for detecting 26 is electrically connected on light-emitting diode assembly 24, and in order to the operating voltage of low-pressure end of detecting light-emitting diode assembly 24, to produce the detecting result.In this execution mode, voltage adjusting device 28 is electrically connected between light-emitting diode assembly 24 and the earth terminal, and in order to adjust the low-pressure end of light-emitting diode 24 and at least one bucking voltage between this earth terminal according to this detecting result.
In the execution mode shown in Fig. 2 A, light-emitting diode assembly 24 comprises the light-emitting diode that many groups connect with series system; Voltage adjusting device 28 can be adjusted respectively and respectively go here and there light-emitting diode separately and the bucking voltage between the earth terminal.In the practical application, each string light-emitting diode can be separately corresponding to an arrangement for detecting 26 and a voltage adjusting device 28.In brief, each is gone here and there the pairing bucking voltage of light-emitting diode and can have nothing in common with each other.See also Fig. 2 B, Fig. 2 B illustrates light-emitting diode assembly 24 and comprises two groups of examples with the light-emitting diode (L1, L2) of series system connection.Shown in Fig. 2 B, these two groups of light-emitting diodes couple arrangement for detecting 26 and booster circuit 280 separately.
In this execution mode, each arrangement for detecting 26 comprises voltage comparator 26A respectively.The input of voltage comparator 26A is connected in the low-pressure end (X of its pairing light emitting diode string
1And X
2), and another input of voltage comparator 26A is in order to receive reference voltage (V
REF).Operating voltage V
L1And V
L2Value equal direct voltage V respectively
DCVoltage when the road deducts light-emitting diode L1 and light-emitting diode L2 conducting.The output of voltage comparator 26A is coupled to booster circuit 280.Voltage comparator 26A is with the operating voltage (V that detects
L1With V
L2) and reference voltage (V
REF) compare after, comparative result is sent to booster circuit 280.
Also shown in Fig. 2 B, each booster circuit 280 in this execution mode comprises control circuit 28A, metal-oxide semiconductor assembly M, diode D and capacitor C respectively.Light emitting diode string L2 with the right side is an example, and its low-pressure end sees through corresponding capacitor C 2 and is connected in to earth terminal, and the voltage at capacitor C 2 two ends is the bucking voltage that booster circuit 280 offers light emitting diode string L2.The summation of the voltage of this bucking voltage and light emitting diode string L2 itself promptly equals this direct voltage V
DC
The output of voltage comparator 26A is electrically connected to the control circuit 28A in the booster circuit 280, by this its comparative result is sent to booster circuit 280.Control circuit 28A can control the gate voltage of metal-oxide semiconductor assembly M according to this comparative result, and then adjusts the voltage at capacitor C 1 or C2 two ends.In this execution mode, as operating voltage V
L1Or V
L2Be higher than reference voltage V
REF, control circuit 28A can improve the voltage at capacitor C 1 or C2 two ends.For example, suppose V
DCVoltage be set to 5V
REF, the initial voltage at capacitor C 2 two ends is set to V
REF, and the voltage during light emitting diode string L2 conducting equals 3V
REF, then when light emitting diode string L2 conducting, operating voltage V
L2Can equal 2V
REFThis moment operating voltage V
L2Be higher than reference voltage V
REF, and its difference is V
REF, control circuit 28A can require booster circuit 280 that the voltage at capacitor C 2 two ends (that is offer light emitting diode string L2 bucking voltage) is boosted to 2V in view of the above
REFIn other words, the summation of the voltage of this adjusted bucking voltage and light emitting diode string L2 itself equals this direct voltage V
DC
Again for example, suppose V
DCVoltage be set in 5V
REF, the initial voltage of capacitor C 1 is set to V
REF, the voltage during light emitting diode string L1 conducting equals 2.5V
REFOperating voltage V when light emitting diode string L1 conducting
L1Can equal 2.5V
REFThis moment operating voltage V
L1Be higher than reference voltage V
REF, and its difference is 1.5V
REFControl circuit 28A can require booster circuit 280 that the voltage of capacitor C 1 (that is offer light emitting diode string L1 bucking voltage) is promoted to 2.5V in view of the above
REF, in other words, the summation of the voltage of this adjusted bucking voltage and light emitting diode string L1 itself equals this direct voltage V
DC
Owing to can exhaust certain voltage, the operating voltage V of the low-pressure end of light emitting diode string during each light emitting diode string running
LMust be lower than the direct voltage V of supply unit 22 outputs
DCFar away according to booster circuit 280 of the present utility model at the high-pressure side of circuit framework middle distance supply unit 22, needn't directly bear the voltage V of supply unit 22 outputs
DCTherefore, booster circuit 280 can reach adjusting equally and respectively go here and there the effect of the voltage that light-emitting diode bore, but its power consumption and volume can be little than the voltage adjusting device in the prior art 18.In addition, the heat energy that booster circuit 280 produces in operation also can be few than the heat energy that voltage adjusting device 18 is produced, and therefore can reduce the heat dissipation problem of LED light source system integral body.
See also Fig. 2 C, Fig. 2 C is another execution mode of the present utility model.This execution mode and Fig. 2 B difference are that the voltage adjusting device 28 in the present embodiment is to realize with reduction voltage circuit 281.Shown in Fig. 2 C, two reduction voltage circuits 281 also comprise control circuit 28A, metal-oxide semiconductor assembly M, diode D and capacitor C respectively.In this execution mode, as operating voltage V
L1Be lower than V
REFThe time, control circuit 28A can reduce the voltage at capacitor C 1 two ends.In like manner, as operating voltage V
L2Be lower than V
REFThe time, control circuit 28A can reduce the voltage at capacitor C 2 two ends.For example, suppose V
DCBe set to 2V
REF, the initial voltage of capacitor C 2 is set to V
REF, and the voltage during light emitting diode string L2 conducting equals 3V
REFWhen light emitting diode string L2 conducting, operating voltage V
L2Value will equal-V
REF, this moment, control circuit 28A can come down to the voltage (promptly offering the bucking voltage of light emitting diode string L2) at capacitor C 2 two ends-V
REF, in other words, the summation of the voltage of this adjusted bucking voltage and light emitting diode string L2 itself still equals this direct voltage V
DC
According to second embodiment of the present utility model is voltage-regulating system in order to the driven for emitting lights diode apparatus.This voltage-regulating system comprises the arrangement for detecting 26 shown in Fig. 2 A, and voltage adjusting device 28.As discussed previously, arrangement for detecting 26 is electrically connected on light-emitting diode assembly, in order to detecting the operating voltage of this light-emitting diode assembly, and produces the detecting result.Voltage adjusting device 28 is electrically connected between this light-emitting diode assembly and earth terminal, in order to adjust at least one bucking voltage between this light-emitting diode and this earth terminal according to this detecting result.
Identical with previous execution mode is to cooperate the light-emitting diode assembly of this voltage-regulating system may comprise the light-emitting diode that plural groups connects with series system.Accordingly, this voltage-regulating system can comprise a plurality of these arrangement for detecting and a plurality of this voltage adjusting device; Each group light-emitting diode is respectively done for oneself and is respectively organized light-emitting diode suitable compensation voltage is provided separately corresponding to an arrangement for detecting and a voltage adjusting device.
Also identical with previous execution mode is, arrangement for detecting 26 in this execution mode can comprise the voltage comparator shown in Fig. 2 B, the first input end of this voltage comparator is connected in the low-pressure end of this light-emitting diode assembly, and second input of this voltage comparator is in order to receive reference voltage.Voltage adjusting device 28 in this execution mode can comprise booster circuit or reduction voltage circuit equally, and by the voltage of adjusting these electric capacity two ends, regulates the bucking voltage between light-emitting diode assembly and earth terminal.
The utility model provides a kind of new framework for the voltage-regulating system of LED source.By voltage adjusting device being arranged between light-emitting diode assembly and the earth terminal, can effectively reducing the power consumption of diode light source system integral body according to voltage-regulating system of the present utility model, and then reduce the heat dissipation problem of LED light source system.Can be widely used in the electronic product of various employing light-emitting diodes as light source according to voltage-regulating system of the present utility model.
By the detailed description of above preferable embodiment, hope can be known description feature of the present utility model and spirit more, and is not to come the utility model is limited with above-mentioned disclosed embodiment.
Claims (10)
1. LED light source system is characterized in that comprising:
Light-emitting diode assembly has at least one voltage during this light-emitting diode assembly conducting;
Supply unit is electrically connected on the high-pressure side of this light-emitting diode, and this supply unit provides direct voltage to this high-pressure side, and this direct voltage is a definite value;
At least one arrangement for detecting is electrically connected on the low-pressure end of this light-emitting diode assembly, and this arrangement for detecting is detected the operating voltage of this low-pressure end, and produces the detecting result; And
At least one voltage adjusting device is electrically connected this low-pressure end and this arrangement for detecting of this light-emitting diode assembly respectively, and this voltage adjusting device is adjusted this low-pressure end of this light-emitting diode and at least one bucking voltage between earth terminal according to this detecting result;
This voltage when wherein, this adjusted bucking voltage adds this light-emitting diode assembly conducting equals this direct voltage.
2. LED light source system according to claim 1 is characterized in that: described light-emitting diode assembly comprises the light-emitting diode that plural groups connects with series system.
3. LED light source system according to claim 2, it is characterized in that: described LED light source system comprises a plurality of these arrangement for detecting and a plurality of this voltage adjusting device, and each group light-emitting diode is separately corresponding to this arrangement for detecting and this voltage adjusting device.
4. LED light source system according to claim 1 is characterized in that: described arrangement for detecting comprises voltage comparator, and second input of this voltage comparator is in order to receive reference voltage.
5. LED light source system according to claim 1 is characterized in that: described voltage adjusting device comprises booster circuit or reduction voltage circuit.
6. one kind in order to cooperate the voltage-regulating system of LED source, it is characterized in that comprising:
At least one arrangement for detecting is electrically connected on the low-pressure end of this light-emitting diode assembly, and this arrangement for detecting is detected the operating voltage of this low-pressure end of this light-emitting diode assembly, and produces the detecting result; And
At least one voltage adjusting device is electrically connected this low-pressure end and this arrangement for detecting of this light-emitting diode assembly respectively, and this voltage adjusting device is adjusted this low-pressure end of this light-emitting diode and at least one bucking voltage between earth terminal according to this detecting result;
Wherein, has at least one voltage during this light-emitting diode assembly conducting, the high-pressure side of this light-emitting diode assembly is in order to receive direct voltage, and this direct voltage is a definite value, and this voltage when this adjusted bucking voltage adds this light-emitting diode assembly conducting equals this direct voltage.
7. voltage-regulating system according to claim 6 is characterized in that: described light-emitting diode assembly comprises the light-emitting diode that plural groups connects with series system.
8. voltage-regulating system according to claim 7, it is characterized in that: described voltage-regulating system comprises a plurality of these arrangement for detecting and a plurality of this voltage adjusting device, and each group light-emitting diode is separately corresponding to this arrangement for detecting and this voltage adjusting device.
9. voltage-regulating system according to claim 6 is characterized in that: described arrangement for detecting comprises voltage comparator, and second input of this voltage comparator is in order to receive reference voltage.
10. voltage-regulating system according to claim 6 is characterized in that: described voltage adjusting device comprises booster circuit or reduction voltage circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201472401U CN201657422U (en) | 2010-03-03 | 2010-03-03 | Light-emitting diode light source system and voltage-regulating system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201472401U CN201657422U (en) | 2010-03-03 | 2010-03-03 | Light-emitting diode light source system and voltage-regulating system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201657422U true CN201657422U (en) | 2010-11-24 |
Family
ID=43122649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201472401U Expired - Fee Related CN201657422U (en) | 2010-03-03 | 2010-03-03 | Light-emitting diode light source system and voltage-regulating system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201657422U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464327A (en) * | 2014-12-17 | 2015-03-25 | 南京莱斯信息技术股份有限公司 | Communication type AC voltage regulating device and signal lamp brightness regulating method thereof |
-
2010
- 2010-03-03 CN CN2010201472401U patent/CN201657422U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464327A (en) * | 2014-12-17 | 2015-03-25 | 南京莱斯信息技术股份有限公司 | Communication type AC voltage regulating device and signal lamp brightness regulating method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8884548B2 (en) | Power factor correction converter with current regulated output | |
| US9215769B2 (en) | LED backlight driver system and associated method of operation | |
| US10230296B2 (en) | Output ripple reduction for power converters | |
| CN102695332A (en) | Hybrid power control system | |
| CN101827476A (en) | Led drive circuit and correlation technique and integrated circuit with the direct conversion and control function of alternating current-direct current | |
| US9615415B2 (en) | LED driving circuit and method using single inductor | |
| CN102510614A (en) | LED (light-emitting diode) multi-lamp distributed group drive system | |
| CN101896027B (en) | Method and circuit for controlling multi-path current distribution of LED power supply | |
| CN104427714A (en) | Driving Circuit for Driving LED Load | |
| CN101600277B (en) | LED circuit | |
| CN105307305B (en) | A kind of LED power control device and television set | |
| CN107454708A (en) | A kind of high PF, the LED driver circuit of controllable silicon light modulation | |
| CN201657422U (en) | Light-emitting diode light source system and voltage-regulating system thereof | |
| CN202276500U (en) | Constant current light-emitting diode (LED) power supply without external metal oxide semiconductor field effect transistor (MOSFET) | |
| CN206848849U (en) | A kind of voltage-stabilized power supply of high input voltage | |
| CN107113930B (en) | The ripple in the light bulb based on light emitting diode (LED) is reduced by increasing the ripple in energy storage capacitor | |
| CN110769173B (en) | Television power supply system and television | |
| CN101742778A (en) | Light-emitting diode light source system and power supply system thereof | |
| US20110222314A1 (en) | Power supply with reduced power consumption | |
| CN202587483U (en) | High-efficiency LED drive circuit | |
| CN203015174U (en) | Led drive circuit | |
| CN102149239B (en) | LED (light-emitting diode) string current-equalizing circuit and control method | |
| CN112105124A (en) | Loop type low-power constant current control circuit and method | |
| CN201590931U (en) | Light-emitting diode light source system and power source supply system thereof | |
| CN220440955U (en) | Driving circuit and lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20160303 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |