CN102147053B - Alternating current led lamp - Google Patents
Alternating current led lamp Download PDFInfo
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- CN102147053B CN102147053B CN2010101067176A CN201010106717A CN102147053B CN 102147053 B CN102147053 B CN 102147053B CN 2010101067176 A CN2010101067176 A CN 2010101067176A CN 201010106717 A CN201010106717 A CN 201010106717A CN 102147053 B CN102147053 B CN 102147053B
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- light emitting
- alternating current
- led lamp
- current led
- pressure limiting
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Abstract
The invention relates to an alternating current LED lamp which comprises two alternating current power supply connecting ends, a light-emitting module and an output direct current power supply circuit, wherein the light-emitting module is electrically connected with the alternating current power supply connecting ends and is provided with at least one LED group consisting of at least one LED; and the output direct current power supply circuit is electrically connected with the alternating current power supply connecting ends and the light-emitting module and is provided with a direct current power supply output side. Therefore, by means of the operation of the output direct current power supply circuit, arrangement of additional transformers can be avoided; and the invention has the effects of lowering circuit arrangement cost, reducing circuit arrangement volume and weight, and the like.
Description
Technical field
The present invention is about a kind of alternating current LED lamp, especially a kind of alternating current LED lamp with an output DC source circuit.
Background technology
Please refer to shown in Figure 1ly, existing alternating current LED lamp comprises two AC power link P1, P2 and a light emitting module 9.This two AC power link P1 and P2 connect respectively this light emitting module 9, so that this AC power is directly for should light emitting module 9; This light emitting module 9 has one first light emitting diode group 91 and one second light emitting diode group 92, respectively this light emitting diode group 91 and 92 consists of by at least one light emitting diode, and this first light emitting diode group 91 and this second light emitting diode group 92 are oppositely and connect.Whereby, this light emitting module 9 can directly connect an AC power, by circulate the respectively operation of this first light emitting diode group 91 and this second light emitting diode group 92 of the positive half cycle power supply of this AC power and negative half period power supply, make this two light emitting diodes group 91 and 92 alternating movements and project light, to reach the purpose of illumination.
Referring again to shown in Figure 1, owing to this light emitting diode can be because energising produces high heat, the heat that therefore produces when operating for reducing this light emitting diode, generally speaking, existing alternating current LED lamp need arrange at least one heat abstractor 8, to carry out the heat radiation of this light emitting module 9.Wherein above-mentioned heat abstractor 8 is generally the flow directing devices such as a radiator fan or a refrigeration wafer, for for required power supply that should heat abstractor 8, therefore inevitably, should certainly will set up at least one extra power circuit by existing alternating current LED lamp, produce a direct current power supply with this, use for this heat abstractor 8.
In view of this, should need be provided with in addition a power supply changeover device 7 by existing alternating current LED lamp, this power supply changeover device 7 is arranged between AC power and this heat abstractor 8, and this power supply changeover device 7 is this dc source in order to change this AC power, and is required for the power supply of this heat abstractor 8.
Further say it, this power supply changeover device 7 comprises a transformer 71 and a current rectifying and wave filtering circuit 72, carry out step-down, rectification and the voltage stabilizing operation of this AC power by these power supply changeover device 7 above-mentioned members 71 and 72, give this heat abstractor 8 so that this stable dc source to be provided.
Yet, above-mentioned existing alternating current LED lamp still has following shortcoming: because these heat abstractor 8 specified effective voltage values are usually less than the effective voltage value of this AC power, therefore must be by the operation of this transformer 71, take further with the specified effective voltage value of this AC power step-down for suitable this heat abstractor 8., arranging of this transformer 71 will cause this existing alternating current LED lamp to have the shortcomings such as integrated circuit setup cost, volume and weight increase.For these reasons, be necessary further to improve above-mentioned existing alternating current LED lamp.
Summary of the invention
Main purpose of the present invention provides a kind of alternating current LED lamp, by the setting of an output DC source circuit, can save the setting of extra transformer, with reduction circuit setup cost, minimizing circuit volume and weight is set.
According to alternating current LED lamp of the present invention, comprise two AC power links, a light emitting module and an output DC source circuit.This light emitting module has two links, and this a light emitting module wherein link connects a wherein AC power link, and this light emitting module has at least one light emitting diode group, and this light emitting diode group is connected in series by at least one light emitting diode and consists of; This output DC source circuit has two links, a this output DC source circuit wherein link connects another AC power link, and another link of this output DC source circuit connects another link of this light emitting module, and this output DC source circuit has a direct current power supply outlet side.
According to alternating current LED lamp of the present invention, comprise two AC power links, a light emitting module and an output DC source circuit.This light emitting module has two links, and two links of this light emitting module connect respectively this two AC powers link, and this light emitting module has at least one light emitting diode group, and this light emitting diode group is connected in series by several light emitting diodes and consists of; Be connected in parallel at least one light emitting diode of several light emitting diodes of this series connection of this output DC source circuit, and this output DC source circuit has a direct current power supply outlet side.
Description of drawings
Fig. 1: the circuit diagram of existing alternating current LED lamp.
Fig. 2 a: the circuit diagram of the alternating current LED lamp of first embodiment of the invention.
Fig. 2 b: the circuit connection diagram of the another kind of light emitting module of the present invention.
Fig. 3: the circuit diagram of the alternating current LED lamp of second embodiment of the invention.
Fig. 4: the circuit diagram of the alternating current LED lamp of third embodiment of the invention.
Fig. 5: the circuit diagram of the alternating current LED lamp of fourth embodiment of the invention.
Fig. 6: the circuit diagram of the alternating current LED lamp of fifth embodiment of the invention.
1 light emitting module, 11 first light emitting diode groups, 12 second light emitting diode groups
1 ' light emitting module, 11 ' rectification unit conducting diode 111 ' positive period
112 ' negative cycle conducting diode, 12 ' light emitting diode group, 2 output DC source circuits
20 dc source outlet sides, 21 rectification units, 22 pressure limiting filter units
221 pressure limiting elements, 222 filter capacitors, 23 backward diodeds
3 output DC source circuits, 30 dc source outlet sides, 31 rectification units
32 pressure limiting filter units, 321 pressure limiting elements, 322 filter capacitors
4 output DC source circuits, 40 dc source outlet sides, 41 rectification units
411 commutation diode group 412 reverse commutation diode group 42 parallel filtering electric capacity forward
5 output DC source circuits, 50 dc source outlet sides, 51 parallel filtering electric capacity
AC1 AC power link AC2 AC power link V1 link
V2 link V1 ' link V2 ' link
V 3 link V4 links 7 power supply changeover devices
71 transformers, 72 current rectifying and wave filtering circuits, 8 heat abstractors
9 light emitting modules, 91 first light emitting diode groups, 92 second light emitting diode groups
P1 AC power link P2 AC power link
The specific embodiment
For above-mentioned and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment of the present invention cited below particularly, and cooperation accompanying drawing are described in detail below:
Please refer to shown in Fig. 2 a, it discloses the alternating current LED lamp of first embodiment of the invention, and it comprises two AC power link AC1, AC2, a light emitting module 1 and an output DC source circuit 2.This AC power link AC1 and AC2 are for connecting an AC power; This light emitting module 1 has two link V1 and V2, and this light emitting module 1 a wherein link V1 connects a wherein AC power link AC1; And this output DC source circuit 2 also has two link V3 and V4, a wherein link V4 of this output DC source circuit 2 connects another AC power link AC2, and another link V2 of this light emitting module 1 is electrically connected another link V3 of this output DC source circuit 2, this output DC source circuit 2 has a direct current power supply outlet side 20, for connecting a heat abstractor 8, wherein above-mentioned heat abstractor 8 is generally the flow directing devices such as a radiator fan or a refrigeration wafer.This light emitting module 1 and this output DC source circuit 2 can receive this AC power, so that this AC power can drive this light emitting module 1 start, and project light, and make the dc source outlet side 20 of this output DC source circuit 2 produce a direct current power supply, required for the power supply of a heat abstractor 8.
Further say it, shown in Fig. 2 a, this light emitting module 1 of first embodiment of the invention comprises one first light emitting diode group 11 and one second light emitting diode group 12, respectively this light emitting diode group 11 and 12 consists of by at least one light emitting diode, and this first light emitting diode group 11 and this second light emitting diode group 12 are oppositely and connect, and two ends of this first light emitting diode group 11 that connects and this second light emitting diode group 12 connect respectively two link V1 and V2 of this light emitting module 1.
This output DC source circuit 2 has a rectification unit 21 and a pressure limiting filter unit 22.This rectification unit 21, this pressure limiting filter unit 22 are connected in series mutually with this light emitting module 1, and are connected the rear series connection loop that forms with this AC power.
Moreover, shown in Fig. 2 a, this rectification unit 21 of first embodiment of the invention is a half-wave rectification circuit, it has a diode, the anode tap of the diode of this rectification unit 21 connects this link V3, and the closure of the light emitting diode in a wherein light emitting diode group 11 of the closure of the diode of this rectification unit 21 and this light emitting module 1 or 12 is consistent, for the positive half cycle power supply of this AC power by this first light emitting diode group 11; Or supply the negative half period power supply of this AC power to pass through this second light emitting diode group 12.
This pressure limiting filter unit 22 further comprises a pressure limiting element 221 and a filter capacitor 222, after this pressure limiting element 221 and this filter capacitor 222 are parallel with one another, connect with this rectification unit 21 again, namely and this pressure limiting element 221 that connects be connected the cathode terminal of the diode of this rectification unit 21 with these filter capacitor 222 1 ends; And and this pressure limiting element 221 that connects be connected this link V4 with these filter capacitor 222 other ends, wherein this pressure limiting element 221 is this dc source outlet side 20 with the place of being connected in parallel of this filter capacitor 222.This pressure limiting element 221 can be limited to a predetermined voltage with the dc source that this dc source outlet side 20 produces, and this pressure limiting element 221 can be selected from receives diode (ZenerDiode) simultaneously; Yet, in the selecting of this pressure limiting element 221, being not limited to the use of this Zener diode, all elements of above-mentioned effect to this dc source pressure limiting that can reach are all in the scope of protection of the invention.In addition, because this filter capacitor 222 also is parallel to this dc source outlet side 20, therefore this dc source can be carried out filtering.
Please refer to shown in Fig. 2 b, it discloses the circuit kenel of another light emitting module 1 ', and this light emitting module 1 ' comprises a rectification unit 11 ' and a light emitting diode group 12 '.This rectification unit 11 ' is a full-wave rectifier, this rectification unit 11 ' have two positive period conducting diode 111 ' and two negative cycle conducting diodes 112 ', this wherein one positive period conducting diode 111 ' anode tap with this wherein the cathode terminal of a negative cycle conducting diode 112 ' jointly be connected a link V1 ' of this light emitting module 1 ', in addition, this another positive period conducting diode another negative cycle conducting diode 112 ' of anode tap and this of 111 ' cathode terminal then jointly be connected another link V2 ' of this light emitting module 1 '; This light emitting diode group 12 ' is made of at least one light emitting diode, and this rectification unit 11 ' is electrically connected with this light emitting diode group 12 ', with common formation one full-wave rectifying circuit framework.
Shown in Fig. 2 b, this output DC source circuit 2 of first embodiment of the invention can be carried out the operation such as the alternating current LED lamp of above-mentioned first embodiment of the invention equally by this link V2 ' that its link V 3 connects this light emitting module 1 '.
Please refer to shown in Figure 3ly, it discloses the alternating current LED lamp of second embodiment of the invention, and compared to the first embodiment, second embodiment of the invention is provided with a backward dioded 23 in addition.This backward dioded 23 be connected in parallel rectification unit 21 and this pressure limiting filter unit 22 of this series connection, and the diode of the closure of this backward dioded 23 and this rectification unit 21 is oppositely, but the closure of the light emitting diode in the closure of this backward dioded 23 and this second light emitting diode group 12 is consistent.
Therefore, referring again to shown in Figure 3, when for should AC power during to the alternating current LED lamp of second embodiment of the invention, the negative half period power supply of this AC power can circulate in by the guiding of this backward dioded 23 this second light emitting diode group 12, driving this second light emitting diode group 12 starts, and then project light.
Please refer to shown in Figure 4, it discloses the alternating current LED lamp of third embodiment of the invention, compared to the first embodiment and the second embodiment, the output DC source circuit 3 of third embodiment of the invention has a rectification unit 31 and a pressure limiting filter unit 32, and this rectification unit 31 is a full-wave rectifying circuit, and this full-wave rectifying circuit, this pressure limiting filter unit 32 are connected in series mutually with this light emitting module 1; Again, the connection of this pressure limiting filter unit 32 and mode of operation are identical with connection and the mode of operation of the pressure limiting filter unit 22 of the first embodiment or the second embodiment, seldom give unnecessary details in this.
Third embodiment of the invention is different from the first embodiment and the second embodiment be in: this full-wave rectifying circuit can carry out full-wave rectification in order to positive half cycle power supply and the negative half period power supply with this AC power, and the waveform after this rectification is seen through this pressure limiting filter unit 32 carry out the filtering of ripple, produce a galvanic current source with the direct current power supply outlet side 30 at this pressure limiting filter unit 32.
Moreover because third embodiment of the invention utilizes this full-wave rectifying circuit to carry out the full-wave rectification of this AC power, so a filter capacitor 322 of this pressure limiting filter unit 32 can be selected a low capacity electric capacity.
Please refer to shown in Figure 5, it discloses the alternating current LED lamp of fourth embodiment of the invention, the output DC source circuit 4 of fourth embodiment of the invention comprises a rectification unit 41, this rectification unit 41 has a commutation diode group 411 forward, this rectification unit 41 is connected in series this light emitting module 1, this forward commutation diode group 411 have the diode of several series connection, and this forward two links of commutation diode group 411 connect respectively this two link V 3 and V4; Moreover, this output DC source circuit 4 has a direct current power supply outlet side 40, this dc source outlet side 40 is connected in parallel to this forward at least one diode of commutation diode group 411, and respectively this diode has a specified bias voltage (for example 3V), therefore fourth embodiment of the invention this number of diodes of commutation diode group 411 forward that can be connected in parallel to this dc source outlet side 40 by adjustment is with the magnitude of voltage of further adjustment from the dc source of these dc source outlet side 40 outputs.
The output DC source circuit 4 of fourth embodiment of the invention includes a filter capacitor 42 in parallel in addition, this parallel filtering electric capacity 42 this dc source outlet side 40 that is connected in parallel.Therefore, the dc source that this output DC source circuit 4 produces can carry out the filtering of ripple by this parallel filtering electric capacity 42, and then provides this heat abstractor 8 stable power supply.
In addition, the rectification unit 41 of fourth embodiment of the invention has a reverse commutation diode group 412 in addition, and this two commutation diodes group 411 and 412 is reverse parallel connection, and this reverse commutation diode group 412 also has the diode of several series connection.Therefore, by the setting of this reverse commutation diode group 412, can provide the negative half period power supply of this AC power to pass through, so that it is luminous to drive these the second light emitting diode group 12 starts.
Again, the diode magnitude setting of this reverse commutation diode group 412 with this forward the diode magnitude setting of commutation diode group 411 be preferably identical, unequal by the electric current of this light emitting module 1 respectively with the positive half cycle power supply of avoiding this AC power and negative half period power supply, and then affect the luminance uniformity of light emitting module 1.
Please refer to shown in Figure 6, it discloses the alternating current LED lamp of fifth embodiment of the invention, compared to the first embodiment to the four embodiment, respectively this light emitting diode group 11 of fifth embodiment of the invention alternating current LED lamp and 12 consists of by several light emitting diodes, and this two AC power link AC1 and AC2 connect respectively two link V1 and V2 of this light emitting module 1, so that this AC power is directly for should light emitting module 1.
Moreover, compared to the 4th embodiment, the output DC source circuit 5 of fifth embodiment of the invention only comprises a filter capacitor 51 in parallel, and be connected in parallel at least one light emitting diodes in wherein one group of light emitting diode group 11 or 12 of this light emitting module 1 of this parallel filtering electric capacity 51.
Generally speaking, each light emitting diode in this light emitting module 1 also all has a specified bias voltage, therefore by this parallel filtering electric capacity 51 this suitably light emitting diode of series connection quantity that is connected in parallel, with the magnitude of voltage of further adjustment from a direct current power supply of a direct current power supply outlet side 50 outputs of this parallel filtering electric capacity 51.
For example, as shown in Figure 6, the parallel filtering electric capacity 51 of this output DC source circuit 5 of the present invention is parallel to the light emitting diode of two series connection of this first light emitting diode group 11, therefore can produce from this dc source outlet side 50 dc source of a 6V.Same, this parallel filtering electric capacity 51 also can be parallel to the light emitting diode of two series connection of this second light emitting diode group 12, produces the dc source of one-6V with this dc source outlet side 50 certainly.
Compared to the 4th embodiment, the parallel filtering electric capacity 51 of fifth embodiment of the invention is because of at least one light emitting diode of this light emitting module 1 directly in parallel, thereby do not need additionally to arrange this two commutation diodes group 411 and 412, therefore have and simplify the effect that circuit connects complexity.
In sum, the present invention is by the setting of the dc source outlet side of this output DC source circuit, provide the power supply of this heat abstractor 8 required to export this dc source, compared to existing alternating current LED lamp technology, the present invention is because need not that this transformer 71 is set, thereby has and reduce the circuit setup cost, reduce the effect that circuit arranges volume and weight.
In addition, the output DC source circuit 2,3 that second embodiment of the invention to the five embodiment disclose, 4 or 5 can see through simple circuit displacement with this another light emitting module 1 ' that Fig. 2 b discloses equally and interconnect, to carry out the circuit operation of alternating current LED lamp of the present invention.
Claims (23)
1. alternating current LED lamp is characterized in that comprising:
Two AC power links;
A light emitting module, have two links, one of them link of this light emitting module connects one of them AC power link, and this light emitting module has at least one light emitting diode group, and this light emitting diode group is made of a light emitting diode or a plurality of light emitting diode that is connected in series; And
An output DC source circuit, have two links, this one of them link of output DC source circuit connects another AC power link, and another link of this output DC source circuit connects another link of this light emitting module, and this output DC source circuit has a dc source outlet side.
2. alternating current LED lamp according to claim 1 is characterized in that, this output DC source circuit has a rectification unit and a pressure limiting filter unit, and this rectification unit, this pressure limiting filter unit and this light emitting module are connected in series mutually.
3. alternating current LED lamp according to claim 2, it is characterized in that, this rectification unit is a half-wave rectifying circuit, it has a diode, and the quantity of the light emitting diode group of this light emitting module is two, and the closure of the light emitting diode in one of them light emitting diode group of the closure of the diode of this rectification unit and this light emitting module is consistent.
4. alternating current LED lamp according to claim 2, it is characterized in that, this pressure limiting filter unit further comprises a pressure limiting element and a filter capacitor, and this pressure limiting element and this filter capacitor are parallel with one another, and pressure limiting element that should parallel connection is connected with this rectification unit with this filter capacitor again.
5. alternating current LED lamp according to claim 3, it is characterized in that, this pressure limiting filter unit further comprises a pressure limiting element and a filter capacitor, and this pressure limiting element and this filter capacitor are parallel with one another, and pressure limiting element that should parallel connection is connected with this rectification unit with this filter capacitor again.
6. alternating current LED lamp according to claim 4 is characterized in that, the place of being connected in parallel of this pressure limiting element and this filter capacitor is this dc source outlet side.
7. alternating current LED lamp according to claim 5 is characterized in that, the place of being connected in parallel of this pressure limiting element and this filter capacitor is this dc source outlet side.
8. according to claim 2 or 4 described alternating current LED lamps, it is characterized in that, this output DC source circuit is provided with a backward dioded in addition, and this backward dioded is connected in parallel in the two ends of rectification unit and this pressure limiting filter unit of this series connection.
9. according to claim 3 or 5 described alternating current LED lamps, it is characterized in that, this output DC source circuit is provided with a backward dioded in addition, and this backward dioded is connected in parallel in the two ends of rectification unit and this pressure limiting filter unit of this series connection.
10. alternating current LED lamp according to claim 7 is characterized in that, this output DC source circuit is provided with a backward dioded in addition, and this backward dioded is connected in parallel in the two ends of rectification unit and this pressure limiting filter unit of this series connection.
11. alternating current LED lamp according to claim 9 is characterized in that, the closure of the closure of this backward dioded and the diode of this rectification unit is reverse.
12. alternating current LED lamp according to claim 2 is characterized in that, this rectification unit is a full-wave rectifying circuit, and this full-wave rectifying circuit, this pressure limiting filter unit and this light emitting module are connected in series mutually.
13. alternating current LED lamp according to claim 12, it is characterized in that, this pressure limiting filter unit further comprises a pressure limiting element and a filter capacitor, and this pressure limiting element and this filter capacitor are parallel with one another, and pressure limiting element that should parallel connection is connected with this rectification unit with this filter capacitor again.
14. alternating current LED lamp according to claim 1, it is characterized in that, this output DC source circuit comprises a rectification unit and a parallel filtering electric capacity, this rectification unit has a forward commutation diode group, this rectification unit is connected in series this light emitting module, and this forward the commutation diode group have the diode of several series connection, this parallel filtering Capacitance parallel connection is connected in this forward at least one diode in the commutation diode group.
15. alternating current LED lamp according to claim 14, it is characterized in that, this forward the commutation diode group have two links, this forward two links of commutation diode group connect two links of this output DC source circuit, the dc source outlet side of this output DC source circuit this parallel filtering electric capacity that is connected in parallel.
16. alternating current LED lamp according to claim 15 is characterized in that, this rectification unit comprises a reverse commutation diode group in addition, this reverse commutation diode group with this forward the commutation diode group be reverse parallel connection and be connected.
17. alternating current LED lamp according to claim 1 is characterized in that, this dc source outlet side connects a heat abstractor.
18. alternating current LED lamp according to claim 17 is characterized in that, this heat abstractor is a radiator fan or a cooling wafer.
19. an alternating current LED lamp is characterized in that comprising:
Two AC power links;
A light emitting module, have two links, two links of this light emitting module connect respectively this two AC power links, and this light emitting module has at least one light emitting diode group, and this light emitting diode group is connected in series by several light emitting diodes and consists of; And
An output DC source circuit be connected in parallel at least one light emitting diodes of several light emitting diodes of this series connection, and this output DC source circuit has a dc source outlet side.
20. alternating current LED lamp according to claim 19 is characterized in that, this output DC source circuit comprises a parallel filtering electric capacity, and this parallel filtering Capacitance parallel connection connects this at least one light emitting diode of several light emitting diodes of this series connection.
21. alternating current LED lamp according to claim 20 is characterized in that, the two ends of this parallel filtering electric capacity are this dc source outlet side.
22. alternating current LED lamp according to claim 19 is characterized in that, this dc source outlet side connects a heat abstractor.
23. alternating current LED lamp according to claim 22 is characterized in that, this heat abstractor is a radiator fan or a cooling wafer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101067176A CN102147053B (en) | 2010-02-08 | 2010-02-08 | Alternating current led lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101067176A CN102147053B (en) | 2010-02-08 | 2010-02-08 | Alternating current led lamp |
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| CN102147053A CN102147053A (en) | 2011-08-10 |
| CN102147053B true CN102147053B (en) | 2013-03-06 |
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| CN2010101067176A Expired - Fee Related CN102147053B (en) | 2010-02-08 | 2010-02-08 | Alternating current led lamp |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103068097B (en) * | 2011-10-24 | 2016-01-20 | 黄焕珠 | A kind of LED illumination lamp utilizing cold and hot neutralization heat radiation |
| CN102882390A (en) * | 2012-09-28 | 2013-01-16 | 陆东海 | Rectifying circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2783693Y (en) * | 2005-03-04 | 2006-05-24 | 吕大明 | AC LED illumination lamp |
| CN101038398A (en) * | 2006-03-15 | 2007-09-19 | Lg.菲利浦Lcd株式会社 | Backlight unit for display device and driving circuit of the same |
| CN201162976Y (en) * | 2008-01-11 | 2008-12-10 | 深圳市日锋电子有限公司 | Acousto-optic controlled ceiling lamp |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2783693Y (en) * | 2005-03-04 | 2006-05-24 | 吕大明 | AC LED illumination lamp |
| CN101038398A (en) * | 2006-03-15 | 2007-09-19 | Lg.菲利浦Lcd株式会社 | Backlight unit for display device and driving circuit of the same |
| CN201162976Y (en) * | 2008-01-11 | 2008-12-10 | 深圳市日锋电子有限公司 | Acousto-optic controlled ceiling lamp |
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| CN102147053A (en) | 2011-08-10 |
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