CN202713681U - LED lamp, power supply module, and transformer circuit - Google Patents
LED lamp, power supply module, and transformer circuit Download PDFInfo
- Publication number
- CN202713681U CN202713681U CN 201220260236 CN201220260236U CN202713681U CN 202713681 U CN202713681 U CN 202713681U CN 201220260236 CN201220260236 CN 201220260236 CN 201220260236 U CN201220260236 U CN 201220260236U CN 202713681 U CN202713681 U CN 202713681U
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- Prior art keywords
- transformer
- power supply
- coil
- supply module
- led lamp
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Abstract
The utility model provides an LED lamp, a power supply module and a transformer circuit. The LED lamp (1) is provided with an LED component (10) and a power supply module (20) which supplies power to the LED component (10). The power supply module (20) comprises a switch element (N1) which connects/disconnects a current path from the LED component (10) to a grounding terminal, a switch control part (CTRL) which controls the connection/disconnection of the switch element (N1) such that current flows in the switch element (N1) is consistent with a target value, and a transformer circuit (X) which supplies power to the switch control part (CTRL) by utilizing drive current which flows in the LED component (10). The transformer circuit (X) comprises a transformer (X1) which supplies induction power to the switch control part (CTRL) and at least one coil, (there is two coils (X2) and (X3) in figure 1) and the induction power is generated in a secondary winding (X12) corresponding to the drive current flows in a primary winding (X11).
Description
Technical field
The utility model relates to the LED(Light Emitting Diode of straight tube fluorescent lamp type) lamp and power supply module and the transformer circuit that can use it.
Background technology
In recent years, the light source of incandescent lamp and fluorescent lamp instead, the LED lamp that begins to popularize long and power saving of life-span.
Wherein, as with an example of above-mentioned relevant prior art, can list patent documentation 1.
The prior art document
Patent documentation
Patent documentation 1: TOHKEMY 2010-110157 communique
The utility model content
The utility model issue to be resolved
But, in the LED of straight tube fluorescent lamp type lamp, must carry a plurality of parts at the rectangular-shaped tellite of the narrow length of width, therefore, expect the as far as possible miniaturization of each parts.But the transformer circuit that power supply module comprises is difficult to keep ratio of winding and carries out simultaneously miniaturization, so become the main cause of the maximization that causes tellite.
The utility model is based on the above-mentioned problem points of being found by applicant of the present utility model, and purpose is: the ratio of winding that can keep on apparent and so that the LED lamp of the straight tube fluorescent lamp type of transformer miniaturization and power supply module and the transformer circuit that can use it are provided.
Be used for solving the method for problem
In order to achieve the above object, LED lamp of the present utility model can be following structure (the first structure): this LED light fixture has: the LED assembly; With the power supply module that above-mentioned LED assembly is carried out the electric power supply, above-mentioned power supply module comprises: switch element, the current path of its conducting/cut-out from above-mentioned LED assembly to earth terminal; The switch control part, it carries out the on/off control of above-mentioned switch element, so that the electric current that flows in above-mentioned switch element is consistent with desired value; With transformer circuit section, it utilizes the drive current of the above-mentioned LED assembly that flows, above-mentioned switch control part is carried out electric power to be supplied with, above-mentioned transformer circuit section comprises: transformer, and its induction power that will produce in secondary winding corresponding to the above-mentioned drive current that flows in a winding supplies to above-mentioned switch control part; With at least one coil that is connected in series with above-mentioned transformer.
In addition, the LED lamp that is made of above-mentioned the first structure can be following structure (the second structure): at least one of above-mentioned coil is connected to outlet side with respect to above-mentioned transformer.
In addition, the LED lamp that is made of the above-mentioned first or second structure can be following structure (the 3rd structure): above-mentioned transformer circuit comprises the capacitor that jointly forms resonant circuit with above-mentioned transformer and above-mentioned coil.
In addition, the LED lamp that is made of above-mentioned the 3rd structure can be following structure (the 4th structure): winding of an end of above-mentioned capacitor and above-mentioned transformer be connected the connected node of coil and be connected.
In addition, the LED lamp that is made of above-mentioned the 4th structure can be following structure (the 5th structure): above-mentioned power supply module also comprises and alternating electromotive force is converted to direct current power and this supplies to above-mentioned LED assembly with direct current power AC/DC converter section.
In addition, the LED lamp that is made of above-mentioned the 5th structure can be following structure (the 6th structure): the circuit element that above-mentioned power supply module comprises carries on long rectangular-shaped printed wiring board.
In addition, the ELD lamp that is made of above-mentioned the 6th structure can be following structure (the 7th structure): above-mentioned transformer and above-mentioned coil are arranged along the long side direction of above-mentioned printed wiring board.
In addition, the LED lamp that is made of above-mentioned the 7th structure can be following structure (the 8th structure): also have: heating panel, and it carries out the heat radiation of above-mentioned LED assembly; With the lid of straight tube fluorescent lamp type, it takes in above-mentioned LED assembly, above-mentioned power supply module and above-mentioned heating panel.
In addition, power supply module of the present utility model can be following structure (the 9th structure): have: the power supply unit that electric power is supplied with is carried out in load; Switch element, its conducting/cut-out is from the above-mentioned current path that loads to earth terminal; The switch control part, it carries out the on/off control of above-mentioned switch element, so that the electric current that flows in above-mentioned switch element is consistent with desired value; With transformer circuit section, it utilizes the drive current that flows in above-mentioned load, above-mentioned switch control part is carried out electric power to be supplied with, above-mentioned transformer circuit section comprises: transformer, and its induction power that will produce in secondary winding corresponding to the above-mentioned drive current that flows in a winding supplies to above-mentioned switch control part; With at least one coil that is connected in series with above-mentioned transformer.
In addition, the power supply module that is made of above-mentioned the 9th structure can be following structure (the tenth structure): at least one of above-mentioned coil is connected with outlet side with respect to above-mentioned transformer.
In addition, the power supply module that is made of the above-mentioned the 9th or the tenth structure can be following structure (the 11 structure): above-mentioned transformer circuit section comprises the capacitor that jointly forms resonant circuit with above-mentioned transformer and above-mentioned coil.
In addition, the power supply module that is made of above-mentioned the 11 structure can be following structure (the 12 structure): winding of an end of above-mentioned capacitor and above-mentioned transformer be connected the connected node of coil and be connected.
In addition, transformer circuit of the present utility model can be following structure (the 13 structure): have: transformer; With at least one coil that is connected in series with above-mentioned transformer.
In addition, the transformer circuit that is made of above-mentioned the 13 structure can be following structure (the 14 structure): above-mentioned transformer, utilize the drive current of the load of flowing in winding to produce induction power in secondary winding, at least one of above-mentioned coil is connected with above-mentioned load-side with respect to above-mentioned transformer.
In addition, the transformer circuit that is made of the above-mentioned the 13 or the 14 structure can be following structure (the 14 structure): also have the capacitor that jointly forms resonant circuit with above-mentioned transformer and above-mentioned coil.
In addition, the transformer circuit that is made of above-mentioned the 15 structure can be following structure (the 14 structure): winding of an end of above-mentioned capacitor and above-mentioned transformer be connected the connected node of coil and be connected.
The utility model effect
According to the utility model, can provide the LED lamp of straight tube fluorescent lamp type of the ratio of winding that can keep on apparent and the miniaturization that realizes transformer and power supply module and the transformer circuit that can use it.
Description of drawings
Fig. 1 is the circuit diagram of a structure example of expression LED lamp 1.
Fig. 2 A is the vertical view (substrate surface) of a structure example of expression power supply module 20.
Fig. 2 B is the vertical view (substrate back) of a structure example of expression power supply module 20.
Fig. 3 is the schematic sectional view of LED lamp 1.
Embodiment
＜circuit diagram 〉
Fig. 1 is the circuit diagram of a structure example of expression LED lamp 1.The LED lamp 1 of this structure example has: LED assembly 10; With power supply module 20.
The first output of commercial ac power source is connected with the first input end of diode bridge DB1 via the first winding of fuse F1 and filter transformator FL1 and FL2.The second output of commercial ac power source is connected with the second input of diode bridge DB1 via the second winding of filter transformator FL1 and FL2.At the input side of filter transformator FL1, between this first winding and the second winding, be connected in parallel to rheostat Z1 and capacitor C1.At the outlet side of filter transformator FL2, be connected with capacitor C2 between this first winding and the second winding.The second end of coil L1 and the anodic bonding of diode D1.The anodic bonding of the negative electrode of diode D1 and LED assembly 10.The second output of diode bridge DB1 is connected with earth terminal.
The first end of capacitor C3 is connected with the negative electrode of diode D1.The second end of capacitor C3 is connected with earth terminal.The first end of resistance R 1 is connected with the negative electrode of diode D1.The second end of resistance R 1 is connected anode with the negative electrode of diode D2 and is connected negative electrode with voltage stabilizing didoe D4 and is connected with diode D3.The anode of diode D2 is connected with earth terminal via the secondary winding X12 that forms transformer X1.The negative electrode of diode D3 is connected with the power pins (pin) of switch control part CTRL.The anode of voltage stabilizing didoe ZD1 is connected with earth terminal.The first end of capacitor C4 is connected with the negative electrode of diode D3.The second end of capacitor C4 is connected with earth terminal.The grounding pin (pin) of switch control part CTRL is connected with earth terminal.
The negative electrode of diode D4 is connected with the negative electrode of diode D1.The anode of diode D4 is connected with the drain electrode of transistor N1.The source electrode of transistor N1 is connected with the first end of resistance R 2, on the other hand, also is connected with the feed back input pin (pin) of switch control part CTRL.The grid of transistor N1 is connected with the control output pin (pin) of switch control part CTRL.The anodic bonding of the first end of capacitor C5 and LED assembly 10.The second end of capacitor C5 is connected with the negative electrode of LED assembly 10.
The first end that forms the winding X11 of transformer X1 is connected with the drain electrode of transistor N1.The second end of a winding X11 is connected with the negative electrode of LED assembly 10 with X3 via coil X2.The first end of capacitor X4 is connected with the second end of a winding X11.The second end of capacitor C4 is connected with earth terminal.
Then, the action of power supply module 20 at length described.Fuse F1, rheostat Z1, capacitor C1, filter transformator FL1 and FL2 and capacitor C2 remove from noise and the fluctuation of the alternating electromotive force of commercial AC power supply.
Diode bridge DB1 carries out full-wave rectification in its prime to the alternating current of having removed noise, fluctuation etc.Coil L1, diode D1 and capacitor C3 so that the output smoothing of diode bridge DB1 generates direct current, and supply to LED assembly 10 with this direct current.Like this, diode bridge DB1, coil L1, diode D1 and capacitor C3 are as alternating current being converted to direct current and this direct current being supplied to the AC/DC converter section performance function of LED assembly 10.
The switch element that transistor N1 is conducting/cut-out from the negative electrode of LED assembly 10 to the current path of earth terminal.Switch control part CTRL is the semiconductor integrated circuit part device, carries out the on/off control of transistor N1 via transistor N1 and resistance R 2, so that the electric current (drive current that is equivalent to LED assembly 10) that flows at earth terminal is consistent with desired value.When transistor N1 connects,, flow towards the electric current of earth terminal via LED assembly 10, transformer circuit X, transistor N1 and resistance R 2 from the negative electrode of diode D1.On the other hand, when transistor N1 disconnected, via transformer circuit X, diode D4 and LED assembly 10, circular current flowed.
Resistance R 1(is hundreds of k Ω～number M Ω for example) be because of following former thereby arrange: when switch control part CTRL start, introduce the charging current of capacitor C4 from the negative electrode of diode D1, about the supply voltage V1(10V of generation switch control part CTRL).After the starting of switch control part CTRL, carry out the charging action of capacitor C4 from transformer circuit X by the current path that is provided with diode D2, continue to carry out power supply to switch control part CTRL and supply with.Wherein, diode D2 and D3 are that backward current (reverse current) prevents element (halfwave rectifier element), and voltage stabilizing didoe ZD1 is retaining element.
Transformer circuit X, it utilizes the drive current that flows in LED assembly 10, switch control part CTRL is carried out electric power supply with.At this, transformer circuit X comprises: transformer X1, and its induction power that will produce in secondary winding X12 corresponding to the drive current that flows in a winding X11 is supplied with to switch control part CTRL; Coil X2 and the X3 of at least one (in this structure example being 2) that is connected in series with transformer X1; With capacitor X4, one end and the winding X11 of transformer X1 are connected connected node and are connected with coil X2.
By such structure, with the ratio of winding of transformer X1 set less, realize the miniaturization of transformer X1, and transformer circuit X integral body is as a transformer, can the setting of the ratio of winding on apparent larger.For example, in the situation of the transformer of realizing ratio of winding 150:1 by parts one by one, the length that forms 3 limits part dimension about 40mm of respectively doing for oneself.On the other hand, at the transformer X1 that uses ratio of winding 50:1 and coil X2 and the X3 about 600 μ H, realize that ratio of winding on apparent is in the situation of transformer circuit X of 150:1, the length that any parts all forms 3 limits part dimension about 10～15mm of respectively doing for oneself.Therefore, compare with realize the situation of transformer circuit X by a transformer, can reduce the thickness of transformer circuit X, so can contribution be arranged to the slimming of power subsystem 20.
Wherein, for the number of ratio of winding, coil X2 and the X3 of transformer X1, consider as transformer circuit X integral body should realize apparent on ratio of winding and the size obtained of power supply 20, can suitably arrange.That is, the number of the coil that is connected in series with transformer X1 is not limited to 2, also can be 1, also can be for more than 3.
In addition, coil X2 and X3 are connected with efferent Z side with respect to transformer X1, also can be connected with switch control part CTRL side, but expect that at least one is connected with efferent Z side with respect to transformer X1.
In addition, in the LED of this structure example lamp 1, except transformer X1, coil X2 and X3, add capacitor X4, formed the LC resonant circuit.By such structure, can improve the energy transfer efficiency to secondary winding X12, so can provide essential electric power to the action of switch control part CTRL.
In addition, connect the position of capacitor X4 one end, expect most transformer X1, and the coil X2 that is connected in series of transformer between.Wherein, connecting in the situation of a plurality of coils, even connect capacitor (for example Fig. 1's between coil X2 and coil X3) between the coil, also can improve energy transfer efficiency.
＜vertical view 〉
Fig. 2 A and Fig. 2 B are respectively the vertical views of a configuration example of expression power supply module 20.Wherein, Fig. 2 A is the surface of expression printed wiring board PCB, and Fig. 2 B is the back side of expression printed wiring board PCB.
Shown in Fig. 2 A and Fig. 2 B, included above-mentioned circuit element in power supply module 20, all shown in Fig. 2 A and Fig. 2 B, the tellite PCB(that carries in the narrow length of width rectangular-shaped (band shape) for example, long limit 307mm, minor face 17.8mm) on.End at the long side direction of printed wiring board PCB is provided with input part Y, and it is used for receiving electric power from the mounted apparatus that is used for mounted LED lamp 1 and supplies with.The other end at the long side direction of printed wiring board PCB is provided with efferent Z, and it is used for the direct current that power supply module 20 produces is supplied to LED assembly 10.In addition, the transformer X1 that transformer circuit X comprises and coil X2, X3 are along the long side direction arranged in series of printed wiring board PCB.By such structure, compare with realize the situation of transformer circuit X by a transformer, can dwindle the minor face size of tellite PCB.In addition, capacitor X4 is configured in the middle body of the short side direction of printed wiring board PCB between transformer X1 and coil X2.
＜sectional view 〉
Fig. 3 is the schematic sectional view of LED lamp 1.The LED lamp 1 of this structure example has above-mentioned LED assembly 10, power supply module 20, in addition, also has heating panel 30 and lid 40.
In addition, the LED lamp 1 of straight tube fluorescent type replaces straight tube fluorescent lamp, is installed on the existing mounted apparatus, and therefore, the size of casing 40 has the upper limit.As shown in Figure 3, the height H 1 of 40 bottom is larger from heating panel 30 to casing, more is scattered by casing 40 from the light of LED assembly 10, becomes the LED lamp 1 that possesses larger luminous intensity distribution.In this case, the height H 2 that is configured in the power subsystem 20 of upside with respect to heating panel 30 becomes problem.As mentioned above, in the LED of this structure example lamp 1, compare with realize the situation of transformer circuit X by transformer, can realize the slimming of power subsystem 20, therefore, comprise transformer X1, can diminish as the height H 2 of power subsystem 20 integral body.By such structure, heating panel 30 can be configured in position higher in the casing 40, therefore has light to arrive from LED assembly 10 to casing the broad scope of 40 inboards, can obtain the brightness of the body sense nearer than existing fluorescent lamp.
＜other variation 〉
In addition, in the above-described embodiment, the applicable structure of the present utility model of LED lamp that is set forth in the straight tube fluorescent lamp type is illustrated as an example, but applicable object of the present utility model is not limited to this, as keep on apparent ratio of winding and so that the technology of transformer miniaturization, also can be widely used in providing the transformer of other purposes.
Disclosed in this manual various technical characterictics except above-mentioned execution mode, can increase various changes in the scope of the creation purport that does not break away from its technology.That is, all aspects of above-mentioned execution mode are example, should not think restriction.Technical scope of the present utility model is not the explanation of above-mentioned execution mode, but disclosed by the scope of claim, is construed as to comprise and belonging to and the meaning of claim scope equalization and the whole change in the scope.
Utilizability on the industry
The LED lamp that the utility model relates to is such as can be as the light source utilization of single light source, work light etc.
Symbol description
1 LED lamp
10 LED assemblies
20 power supply modules
30 heating panels
40 lids
N1 N channel-type MOS electric field effect transistor
R1, R2 resistance
C1～C5 capacitor
D1～D4 diode
The ZD1 voltage stabilizing didoe
The DB1 diode bridge
FL1, FL2 filter transformator
The F1 fuse
The Z1 rheostat
CTRL switch control part
The X transformer circuit
The X1 transformer
Winding of X11
The X12 secondary winding
X2, X3 coil
The X4 capacitor
The Y input part
The Z efferent
The PCB tellite
Claims (16)
1. LED lamp is characterized in that having:
The LED assembly; With
Described LED assembly is carried out the power supply module that electric power is supplied with,
Described power supply module comprises:
Switch element, the current path of its conducting/cut-out from described LED assembly to earth terminal;
The switch control part, it carries out the on/off control of described switch element, so that the electric current that flows in described switch element is consistent with desired value; With
Transformer circuit section, it utilizes the drive current that flows in described LED assembly, and described switch control part is carried out electric power supply with,
Described transformer circuit section comprises:
Transformer, its induction power that will produce in secondary winding corresponding to the described drive current that flows in a winding supplies to described switch control part; With
At least one coil that is connected in series with described transformer.
2. LED lamp as claimed in claim 1 is characterized in that:
At least one of described coil is connected with outlet side with respect to described transformer.
3. LED lamp as claimed in claim 1 or 2 is characterized in that:
Described transformer circuit section comprises the capacitor that jointly forms resonant circuit with described transformer and described coil.
4. LED lamp as claimed in claim 3 is characterized in that:
Winding of one end of described capacitor and described transformer be connected the connected node of coil and be connected.
5. LED lamp as claimed in claim 4 is characterized in that:
Described power supply module also comprises alternating electromotive force is converted to direct current power and this direct current power is supplied to the AC/DC converter section of described LED assembly.
6. LED lamp as claimed in claim 5 is characterized in that:
The circuit element that described power supply module comprises carries on long rectangular-shaped printed wiring board.
7. LED lamp as claimed in claim 6 is characterized in that:
Described transformer and described coil are arranged along the long side direction of described printed wiring board.
8. LED lamp as claimed in claim 7 is characterized in that also having:
Heating panel, it carries out the heat radiation of described LED assembly; With
The lid of straight tube fluorescent lamp type, it takes in described LED assembly, described power supply module and described heating panel.
9. power supply module is characterized in that having:
The power supply unit that electric power is supplied with is carried out in load;
Switch element, its conducting/cut-out is from the described current path that loads to earth terminal;
The switch control part, it carries out the on/off control of described switch element, so that the electric current that flows in described switch element is consistent with desired value; With
Transformer circuit section, it utilizes the drive current that flows in described load, and described switch control part is carried out electric power supply with,
Described transformer circuit section comprises:
Transformer, its induction power that will produce in secondary winding corresponding to the described drive current that flows in a winding supplies to described switch control part; With
At least one coil that is connected in series with described transformer.
10. power supply module as claimed in claim 9 is characterized in that:
At least one of described coil is connected with outlet side with respect to described transformer.
11. such as claim 9 or 10 described power supply modules, it is characterized in that:
Described transformer circuit section comprises the capacitor that jointly forms resonant circuit with described transformer and described coil.
12. power supply module as claimed in claim 11 is characterized in that:
Winding of one end of described capacitor and described transformer be connected the connected node of coil and be connected.
13. a transformer circuit is characterized in that having:
Transformer; With
At least one coil that is connected in series with described transformer.
14. transformer circuit as claimed in claim 13 is characterized in that:
Described transformer utilizes the drive current of the load of flowing in winding to produce induction power in secondary winding,
At least one of described coil is connected with described load-side with respect to described transformer.
15. such as claim 13 or 14 described transformer circuits, it is characterized in that:
Also has the capacitor that jointly forms resonant circuit with described transformer and described coil.
16. transformer circuit as claimed in claim 15 is characterized in that:
Winding of one end of described capacitor and described transformer be connected the connected node of coil and be connected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011124799A JP5863282B2 (en) | 2011-06-03 | 2011-06-03 | LED lamp, power module, transformer circuit |
| JP2011-124799 | 2011-06-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202713681U true CN202713681U (en) | 2013-01-30 |
Family
ID=47526167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220260236 Expired - Fee Related CN202713681U (en) | 2011-06-03 | 2012-06-04 | LED lamp, power supply module, and transformer circuit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5863282B2 (en) |
| CN (1) | CN202713681U (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014217126A (en) * | 2013-04-24 | 2014-11-17 | ローム株式会社 | Power source module and led illumination lamp |
| CN103687241B (en) * | 2013-12-18 | 2017-01-04 | 许荣林 | Emergency led lamp |
| JP2016072189A (en) * | 2014-10-01 | 2016-05-09 | 久豊技研株式会社 | Light source device for illumination |
| JP7345113B2 (en) | 2020-02-26 | 2023-09-15 | パナソニックＩｐマネジメント株式会社 | Lighting systems and lighting equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101919146B (en) * | 2008-01-18 | 2013-07-31 | 奥斯兰姆有限公司 | Buck converter for making power available to at least one led |
| JP3142817U (en) * | 2008-04-16 | 2008-06-26 | 操二 小林 | LED lighting unit |
| JP2010021109A (en) * | 2008-07-14 | 2010-01-28 | Panasonic Electric Works Co Ltd | Lighting-up device, and backlight device |
-
2011
- 2011-06-03 JP JP2011124799A patent/JP5863282B2/en not_active Expired - Fee Related
-
2012
- 2012-06-04 CN CN 201220260236 patent/CN202713681U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP5863282B2 (en) | 2016-02-16 |
| JP2012253911A (en) | 2012-12-20 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20170604 |