CN202617405U - LED lighting device - Google Patents
LED lighting device Download PDFInfo
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- CN202617405U CN202617405U CN 201220231901 CN201220231901U CN202617405U CN 202617405 U CN202617405 U CN 202617405U CN 201220231901 CN201220231901 CN 201220231901 CN 201220231901 U CN201220231901 U CN 201220231901U CN 202617405 U CN202617405 U CN 202617405U
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- led light
- led
- control module
- light source
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Abstract
The utility model relates to an LED lighting device which includes a rectifier module, an LED lighting module, and a control module. The rectifier module is connected with the control module. The rectifier module rectifies the alternating current into the direct current. The direct current passes through the control module. The LED lighting module also includes multiple LED light sources, and each LED light source is connected with the control module. The control module detects the circuit voltage, when the circuit voltage is smaller than the series driving voltage of each of the LED light sources, the control module coverts the connection of the LED light sources into the parallel connection, and when the circuit voltage is equal to or bigger than the series driving voltage of each of the LED light sources, the control module coverts the connection of the LED light sources into the parallel connection. The LED lighting device can maintain the switch type constant current source function and can improve the power utilization rate.
Description
Technical field
The utility model relates to a kind of Circuits System, particularly a kind of LED light-emitting device.
Background technology
The LED Driving technique; Mainly be with conventional transformer step-down, electronic transformer step-down, capacitance decompression, resistance step-down, RCC step down switching regulator, PWM control type Switching Power Supply etc.; All be to use traditional power technology; Because the performance and the conversion efficiency of the different LED power supply of all size have nothing in common with each other, thus select suitable, the LED power source special could really demonstrate out the dynamical characteristic of led light source efficiently.Because inefficient LED power supply itself just needs to consume a large amount of electric energy, so in process, just can't highlight the characteristics of energy saving of LED to the LED power supply; Moreover; Adopt the power semiconductor of switching regulator constant-current supply in switching process, can cause powerful Conducted Electromagnetic Interference harmonic interference; And strong-electromagnetic field radiation. severe contamination periphery electromagnetic environment not only; Near to electric equipment causes electromagnetic interference, if use this scheme, just is difficult to obtain the approval of countries in the world.
At present; The market mainstream is that the input of LED driving power comprises high pressure industrial frequency AC (being civil power), low-voltage direct, HVDC, low pressure high-frequency ac framework; Core parts comprise on-off controller, inductor, switching component, feedback resistance, input filter spare, output filter spare composition, and the output of LED driving power is then most of for changing the constant current source that change voltage with LED forward voltage drop value.
So market needs now be a kind of can maintained switch formula constant-current source function, and improve the LED light-emitting device of power utilization efficient.
The utility model content
The utility model purpose be to provide a kind of can maintained switch formula constant-current source function, and improve the LED light-emitting device of power utilization efficient.
Above-mentioned LED light-emitting device comprises rectification module, LED lighting module and control module, and rectification module and control module are joined,
Said rectification module is a direct current with AC rectification, and direct current is through control module;
Said LED lighting module comprises some groups of led light sources, and every group of led light source all joins with control module;
Said control module testing circuit voltage,
When circuit voltage was organized the driving voltage of led light source series connection less than each, control module converted the connection between each group led light source into and is connected in parallel;
When circuit voltage was equal to or higher than the driving voltage of respectively organizing the led light source series connection, control module converted the connection between each group led light source into and is connected in series.
Adopt the described scheme of the utility model; Make led light source change connection mode according to the height of circuit voltage; When circuit voltage is low; Each group led light source is connected in parallel, makes and respectively organize led light source and can obtain equal voltage, thereby under low voltage, also can drive two groups of led light source work simultaneously; When circuit voltage is higher, each group led light source is connected in series, make two groups of led light sources work simultaneously and operating voltage is unlikely to too high and damages device.
Therefore such scheme can make full use of electric energy, has reduced unnecessary waste, has more improved the stability of equipment, thereby the useful life of the equipment that increases.
Preferably, said rectification module is a bridge rectifier.
Bridge rectifier is simply direct, only is made up of four diodes, has reduced the use amount of device, thereby reduces the failure rate of circuit and reduced production cost.
Preferably, said led light source comprises several led chips, between each led chip for the parallel connection or be connected in series.
Preferably, said led chip is the high-voltage LED chip.
Because said high-voltage LED chip has more than 2 the PN junction of series connection,, also improved the integrated level of LED so reduced the packaging cost when adopting a plurality of individual LED chip.
Preferably, said control module is the high-voltage LED chip for driving.
Description of drawings
Fig. 1 is the circuit diagram of the utility model;
Fig. 2 is the utility model operating voltage sketch map.
Embodiment
The embodiment of the utility model is as shown in Figure 1, comprises rectification module, control module and LED lighting module.
Said control module is a high-voltage LED chip for driving 13, and high-voltage LED chip for driving 13 comprises pin 1 to pin 8.
Wherein, pin 1 is used for joining with power supply ground.
Said rectification module is a bridge rectifier 11; Bridge rectifier 11 is joined by 4 diodes and forms; Bridge rectifier 11 joins with pin 1, the pin 8 of high-voltage LED chip for driving 13, and bridge rectifier 11 is directly simple, only is made up of four diodes; Reduced the use amount of device, thereby reduced the failure rate of circuit and reduced production cost.
Said LED lighting module comprises first led light source 14 and second led light source 12; First led light source 14 and second led light source 12 are in series by 6 high-voltage LED lamp pearls; And first led light source 14 joins with pin 3, the pin 4 of high-voltage LED chip for driving 13; Second led light source 12 links to each other with pin 2, pin 5, the pin 7 of high-voltage LED chip for driving 13, and wherein said high-voltage LED lamp pearl is made up of the high-voltage LED chip.
Because said high-voltage LED chip has more than 2 the PN junction of series connection,, also improved the integrated level of LED so reduced the packaging cost when adopting a plurality of individual LED chip.
When the work of said LED light-emitting device, the diode alternate conduction in the bridge rectifier 11, thus changing alternating current into direct current, the direct current after the rectification is through high-voltage LED chip for driving 13, the size of high-voltage LED chip for driving 13 testing circuit voltages; As shown in Figure 2, in circuit voltage was in the AB interval, when promptly circuit voltage was less than the driving voltage of two groups of led light sources series connection, high-voltage LED chip for driving 13 was opened pin 2 and pin 4, thereby first led light source 14 and second led light source 12 are connected in parallel; In circuit voltage was in the C interval, when promptly circuit voltage was more than or equal to the driving voltage of two groups of led light sources series connection, high-voltage LED chip for driving 13 was closed pin 2 and pin 4, thereby first led light source 14 and second led light source 12 are connected in series.
If first led light source 14 and second led light source 12 keep being connected in series, because circuit voltage is periodically to rise and fall, so when circuit voltage was low, circuit voltage was not enough to drive simultaneously two groups of led light source work; If first led light source 14 and second led light source 12 keep being connected in parallel, when circuit voltage raise, circuit voltage was far above the operating voltage of one group of led light source, thereby caused the led light source damage easily.
And the described scheme of employing the utility model; Make led light source change connection mode according to the height of circuit voltage; When circuit voltage is low; First led light source 14 is parallelly connected with second led light source 12, make two groups of led light sources can obtain equal voltage, thereby under low voltage, also can drive two groups of led light source work simultaneously; When circuit voltage is higher, first led light source 14 is connected in series with second led light source 12, make two groups of led light sources work simultaneously and operating voltage is unlikely to too high.
The improved protection range that also is regarded as patent on the basis of above execution mode.
Claims (5)
1. a LED light-emitting device comprises rectification module, LED lighting module and control module, and rectification module and control module are joined, and it is characterized in that:
Said rectification module is a direct current with AC rectification, and direct current is through control module;
Said LED lighting module comprises some groups of led light sources, and every group of led light source all joins with control module;
Said control module testing circuit voltage,
When circuit voltage was organized the driving voltage of led light source series connection less than each, control module converted the connection between each group led light source into and is connected in parallel;
When circuit voltage was equal to or higher than the driving voltage of respectively organizing the led light source series connection, control module converted the connection between each group led light source into and is connected in series.
2. LED light-emitting device according to claim 1 is characterized in that: said rectification module is a bridge rectifier.
3. LED light-emitting device according to claim 1 is characterized in that: said led light source comprises several led chips, between each led chip for the parallel connection or be connected in series.
4. LED light-emitting device according to claim 3 is characterized in that: said LED chip is the high-voltage LED chip.
5. LED light-emitting device according to claim 4 is characterized in that: said control module is the high-voltage LED chip for driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231901 CN202617405U (en) | 2012-05-22 | 2012-05-22 | LED lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231901 CN202617405U (en) | 2012-05-22 | 2012-05-22 | LED lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202617405U true CN202617405U (en) | 2012-12-19 |
Family
ID=47351070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220231901 Expired - Lifetime CN202617405U (en) | 2012-05-22 | 2012-05-22 | LED lighting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202617405U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780646A (en) * | 2014-01-15 | 2015-07-15 | 四川新力光源股份有限公司 | LED driving circuit supporting controllable silicon diming |
-
2012
- 2012-05-22 CN CN 201220231901 patent/CN202617405U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104780646A (en) * | 2014-01-15 | 2015-07-15 | 四川新力光源股份有限公司 | LED driving circuit supporting controllable silicon diming |
| CN104780646B (en) * | 2014-01-15 | 2018-06-05 | 四川新力光源股份有限公司 | A kind of LED drive circuit for supporting controllable silicon light modulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong City, Nanshan District province high tech in the middle of the two road, No. 2 Shenzhen International Software Park, room 201-205, room, 4 (only office) (222-226) Patentee after: Shenzhen mayor express Semiconductor Technology Co., Ltd. Address before: 518057, No. 2, building 4, two software park, central science and technology, Nanshan District New District, Shenzhen, Guangdong Patentee before: Shenzhen CYT Optoelectronic Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121219 |