CN102338319A - Alternating-current LED (light emitting diode) illumination device - Google Patents
Alternating-current LED (light emitting diode) illumination device Download PDFInfo
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- CN102338319A CN102338319A CN2010102366438A CN201010236643A CN102338319A CN 102338319 A CN102338319 A CN 102338319A CN 2010102366438 A CN2010102366438 A CN 2010102366438A CN 201010236643 A CN201010236643 A CN 201010236643A CN 102338319 A CN102338319 A CN 102338319A
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Abstract
The invention relates to an alternating-current LED (light emitting diode) illumination device which comprises a heat radiation substrate, a plurality of LED chips arranged on the heat radiation substrate, a circuit layer, a packaging layer, an electrode exposing out of the packaging layer and a driving unit; the plurality of LED chips are combined into at least two groups of serial LED chip sets, and each group of LED chip set comprises at least two reversely parallel LED chips; the driving unit comprises a transformer and a bilaterial switch; one end of a first switch in the bilaterial switch is selectively connected with the output end of the transformer so that the driving unit ouputs driving voltages with different sizes to the plurality of LED chips; one end of a second switch in the bilateral switch is connected with the first switch, and the other end of the second switch is selectively connected with partial or all of the plurality of LED chips electrically.
Description
Technical field
The present invention relates to a kind of light emitting diode illuminating apparatus, particularly a kind of by exchanging electrically driven (operated) light emitting diode illuminating apparatus.
Background technology
At present, (Light Emitting Diode, LED) characteristic such as good and luminous efficiency height is widely used in a lot of fields to light emitting diode because of the tool light quality.Because the luminous intensity of LED is almost proportional with the injection electric current, so mostly adopt dc powered LED luminous.Yet the luminous efficiency of LED can reduce along with the increase of injecting electric current, and the increase of electric current simultaneously also can make LED knot surface temperature too high, has shortened the life-span of LED.In order to reduce the heat that produces when LED works; Can adopt pulse width modulation (Pulse Width Modulation Dimming; PWMDimming) mode is controlled the on off state of LED, but the PWM control mode still need operate under the state of electric current deciding, and makes to comprise an AC-DC converter at least in the drive circuit of LED; So just reduce the power utilization efficient of whole light emitting diode illuminating apparatus, improved cost.
In view of this, be necessary to provide a kind of type of drive the simple and higher alternating-current light emitting diode lighting device of power utilization efficient.
Summary of the invention
Below will the simple and higher alternating-current light emitting diode lighting device of power utilization efficient of a kind of type of drive be described with embodiment.
A kind of alternating-current light emitting diode lighting device, it comprises a heat-radiating substrate, a plurality of led chips that are arranged on this heat-radiating substrate; A circuit layer; An encapsulated layer, one is arranged on this heat-radiating substrate and exposes the electrode outside this encapsulated layer to the open air, and a driver element.These a plurality of led chips are connected with this heat-radiating substrate is hot, and these a plurality of led chips are combined into the led chip group of at least two groups series connection, comprise the led chip of at least two reverse parallel connections in every group of led chip group.This circuit layer is arranged on this heat-radiating substrate, and these a plurality of led chips and the electric connection of this circuit layer.This encapsulated layer coats these a plurality of led chips and reaches at least partly this circuit layer.This electrode comprises at least three contact points.This driver element comprises a transformer and a bilateral switch; This transformer has an input and an output; This input is used for being connected with an AC power; This output electrically connects by the electrode on this bilateral switch and this heat-radiating substrate; This bilateral switch has first switch near this transformer and reaches the second switch near these a plurality of led chips; One end of this first switch is optionally connected with the output of this transformer so that this driver element is exported the driving voltage of different sizes to these a plurality of led chips, and an end of this second switch links to each other with this first switch, and the other end of this second switch optionally with these a plurality of led chips in part or all electric connections.
A kind of alternating-current light emitting diode lighting device, it comprises: a heat-radiating substrate; A plurality of being arranged on this heat-radiating substrate and the led chip of series connection, these a plurality of led chips are connected with this heat-radiating substrate is hot; A circuit layer, this circuit layer is arranged on this heat-radiating substrate, and these a plurality of led chips and the electric connection of this circuit layer; An encapsulated layer, this encapsulated layer coat these a plurality of led chips and reach at least partly this circuit layer; One is arranged on this heat-radiating substrate and exposes the electrode outside this encapsulated layer to the open air, and this electrode comprises at least three contact points; And driver element.This driver element comprises a transformer and a bilateral switch.This transformer has an input and an output, and this input is used for being connected with an AC power, and this output electrically connects by the electrode on this bilateral switch and this heat-radiating substrate.This bilateral switch has first switch near this transformer and reaches the second switch near these a plurality of led chips.The input of this first switch is optionally connected so that this driver element is exported the driving voltage of different sizes to these a plurality of led chips with the output of this transformer.The output of this second switch optionally with these a plurality of led chips in part or all electrically connect.Connect between the output of this first switch and the input of this second switch first diode of a forward conduction, and second diode of a reverse conducting of series connection between the negative pole end of the output of this first switch and these a plurality of led chips of connecting.Connect between one end points of this transformer output and the input of this second switch the 3rd diode of a forward conduction.The 4th diode of a reverse conducting of series connection between this end points of this transformer output and the negative pole end of these a plurality of led chips of connecting.
The driver element of this alternating-current light emitting diode lighting device can directly link to each other with an AC power to drive these a plurality of led chips, so the driver element of this alternating-current light emitting diode lighting device is more simple compared to existing drive circuit.Further, do not use power consumption assemblies such as AC-DC converter in this alternating-current light emitting diode lighting device, make that the power utilization efficient of this alternating-current light emitting diode lighting device is higher.In addition, first switch of bilateral switch is optionally connected with the output of its transformer so that this driver element is exported the driving voltage of different sizes to these a plurality of led chips, but the luminous intensity of these a plurality of led chips of modulation, to adapt to different demands.
Description of drawings
Fig. 1 is the structural representation of the alternating-current light emitting diode lighting device that provides of first embodiment of the invention.
Fig. 2 is the circuit diagram of the alternating-current light emitting diode lighting device among Fig. 1.
Fig. 3 is the circuit diagram of the alternating-current light emitting diode lighting device that provides of second embodiment of the invention.
The main element symbol description
Alternating-current light emitting diode lighting device 100,200
Heat-radiating substrate 110
Led chip 120,220
Circuit layer 130
Electrode 140
Encapsulated layer 150
Driver element 160,260
Bilateral switch 162,262
The first led chip group 101
The second led chip group 102
The 3rd led chip group 103
The specific embodiment
Below will combine accompanying drawing that the present invention is done further detailed description.
See also Fig. 1, a kind of alternating-current light emitting diode lighting device 100 that first embodiment of the invention provides comprises a heat-radiating substrate 110,140, one encapsulated layers 150 of 130, one electrodes of 120, one circuit layers of a plurality of led chips, and a driver element 160.
Heat-radiating substrate 110 is processed by insulation and material that have high thermal conductivity, for example: silicon nitride (Si
3N
4), carborundum (SiC), zirconia (ZrO
2), boron carbide (B
4C), titanium diboride (TiB
2), aluminium oxide (Al
xO
y), aluminium nitride (AlN), the mixture of beryllium oxide (BeO) or previous materials etc.In addition, heat-radiating substrate 110 also can be the electrically-conductive backing plate that surfaces coated is covered with insulating materials.
These a plurality of led chips 120 are arranged on the surface of this heat-radiating substrate 110.These a plurality of led chips 120 and these 110 hot connections of heat-radiating substrate.Led chip 120 can be red-light LED, green light LED, blue-ray LED, yellow light LED or UV LED.
This circuit layer 130 can be by the long-pending method in chemical gaseous phase Shen, or the long-pending method in physics Shen such as sputter is formed on this heat-radiating substrate 110, and in the present embodiment, this circuit layer 130 is arranged on the surface that carries led chip 120 of this heat-radiating substrate 110.The both positive and negative polarity of each led chip 120 (figure does not show) electrically connects with this circuit layer 130.
This electrode 140 is arranged on this heat-radiating substrate 110, and in the present embodiment, this electrode 140 is arranged on the surface that carries led chip 120 of this heat-radiating substrate 110.This electrode 140 comprises at least three contact points, and in the present embodiment, this electrode 140 comprises four contact points.Four contact points of this electrode 140 are electrically connected with this circuit layer 130 respectively.
This encapsulated layer 150 is arranged on this heat-radiating substrate and coats a plurality of led chips and circuit layer 130 at least partly.Wherein, electrode 140 exposes to the open air outside encapsulated layer 150.These encapsulated layer 150 material therefors comprise silica gel (Silicone), epoxy resin (Epoxy resin), PMMA, thermosetting shape light transmissive materials such as plastics.At least a fluorescent material that also can mix in this encapsulated layer 150, for example: sulfide (Sulfides), aluminate (Aluminates), oxide (Oxides), silicate (Silicates), nitride materials such as (Nitrides).Common fluorescent material has YAG fluorescent material, TAG fluorescent material etc.
See also Fig. 2, driver element 160 of the present invention comprises a transformer 161 and a bilateral switch (double side switch) 162.Transformer 161 has a primary coil N1 and a secondary coil N2.The two ends a of primary coil N1, b is used for being connected with an AC power as the input of transformer 161, and alternating voltage is generally 100V～230V.The two ends c of secondary coil N2 stretches out a plurality of taps (tapped) 1611 between the d.Bilateral switch 162 has a second switch 1622 that reaches near led chip 120 near first switch 1621 of transformer 161.One end of first switch 1621 optionally is connected with end points c or any tap 1611 of this secondary coil N2, and the other end of first switch 1621 links to each other with a capacitor C 1.The vacant end of capacitor C 1 links to each other with an end of second switch 1622, the other end of second switch 1622 optionally with led chip 120 in part or all electrically connect.The end points d of secondary coil N2 links to each other with a resistance R 1; The ends that electrically connect with led chip 120 of the vacant end of resistance R 1 and second switch 1622 as the output of driver element 160 respectively be arranged on this heat-radiating substrate 110 on the contact point of electrode 140 link to each other, driving voltage to be provided to these a plurality of led chips 120.This first switch 1621 is in order to the size of the driving voltage in these a plurality of led chips 120 of adjustment input, to give different numbers or 120 power supplies of fixed number led chip.Owing to comprise the chip that can send different color light in this led chip 120, and this second switch 1622 gives different led chips 120 power supplies in order to switch, so but modulation different light colors output by this.When the switch driving voltage of exporting was big, led chip 120 numbers of lighting were more or electric current is bigger, and relative luminous intensity is also bigger, otherwise then diminishes.When the coil number of 1611 of the taps of secondary coil N2 comparatively near the time, the dimming effect that is produced is also comparatively soft, can not produce excessively too strong phenomenon.
In this embodiment, these a plurality of led chips 120 are combined into the first led chip group, 101, the second led chip groups, 102, the three led chip groups 103 by this circuit layer 130.The connected mode of a plurality of led chips 120 in these three led chip groups 101,102,103 is earlier reverse parallel connection in twos, again series connection.Led chip group 101 after the series connection; 102,103 two ends, the first led chip group 101 is connected in the node of the second led chip group 102; And second led chip group 102 be connected in the node of the 3rd led chip group 103, be electrically connected with four contact points of this electrode 140 respectively.
This shows; The driver element 160 of alternating-current light emitting diode lighting device 100 can directly link to each other with an AC power; To drive these a plurality of led chips 120; First switch 1621 of bilateral switch 162 can be adjusted the size of driving voltage in these a plurality of led chips 120 of input, so this driver element 160 is more simple compared to existing drive circuit.Further, do not use power consumption assemblies such as AC-DC converter in this alternating-current light emitting diode lighting device 100, make that the power utilization efficient of this alternating-current light emitting diode lighting device 100 is higher.
See also Fig. 3; A kind of alternating-current light emitting diode lighting device 200 that second embodiment of the invention provides; The alternating-current light emitting diode lighting device 100 that itself and above-mentioned first embodiment provide is basic identical, and difference is: the led chip 220 that comprises a plurality of series connection in this alternating-current light emitting diode lighting device 200; The bilateral switch 262 of driver element 260 has a second switch 2622 that reaches near led chip 220 near first switch 2621 of transformer 261.The input of first switch 2621 optionally is connected with end points c or any tap 2611 of this secondary coil N2.The output of second switch 2622 optionally with led chip 220 in part or all electrically connect.Connect between the input of the output of first switch 2621 and this second switch 2,622 first diode D1 of a forward conduction, and the second diode D2 of a reverse conducting of series connection between the negative pole end of the output of first switch 2621 and these a plurality of led chips of connecting 220.Connect between the end points d of secondary coil N2 and the input of this second switch 2622 the 3rd diode D3 of a forward conduction, and the 4th diode D4 of a reverse conducting of series connection between the negative pole end of the end points d of secondary coil N2 and these a plurality of led chips of connecting 220.In the present embodiment, no matter the voltage through these transformer 161 outputs is forward or reverse, and the led chip 220 of these a plurality of series connection is forward bias.
Be noted that above-mentioned embodiment is merely preferred embodiments of the present invention, those skilled in the art also can do other variation in spirit of the present invention, for example: the loading end coplane of the exiting surface of led chip and heat-radiating substrate; Change shape of heat-radiating substrate or the like, these all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.
Claims (7)
1. alternating-current light emitting diode lighting device, it comprises:
A heat-radiating substrate;
A plurality of led chips that are arranged on this heat-radiating substrate, these a plurality of led chips are connected with this heat-radiating substrate is hot, and these a plurality of led chips are combined into the led chip group of at least two groups series connection, comprise the led chip of at least two reverse parallel connections in every group of led chip group;
A circuit layer, this circuit layer is arranged on this heat-radiating substrate, and these a plurality of led chips and the electric connection of this circuit layer;
An encapsulated layer, this encapsulated layer coat these a plurality of led chips and reach at least partly this circuit layer;
One is arranged on this heat-radiating substrate and exposes the electrode outside this encapsulated layer to the open air, and this electrode comprises at least three contact points;
A driver element; It comprises a transformer and a bilateral switch; This transformer has an input and an output; This input is used for being connected with an AC power; This output electrically connects by the electrode on this bilateral switch and this heat-radiating substrate, and this bilateral switch has first switch near this transformer and reaches the second switch near these a plurality of led chips, and an end of this first switch is optionally connected so that this driver element is exported the driving voltage of different sizes to these a plurality of led chips with the output of this transformer; One end of this second switch links to each other with this first switch, and the other end of this second switch optionally with these a plurality of led chips in part or all electrically connect.
2. alternating-current light emitting diode lighting device as claimed in claim 1 is characterized in that, this led chip is a red-light LED, green light LED, blue-ray LED, yellow light LED.
3. alternating-current light emitting diode lighting device as claimed in claim 1 is characterized in that, this led chip is blue-ray LED or UV LED, is doped with fluorescent material in this encapsulated layer.
4. alternating-current light emitting diode lighting device as claimed in claim 1 is characterized in that, the electric capacity of connecting between this first switch and this second switch.
5. alternating-current light emitting diode lighting device as claimed in claim 1 is characterized in that, the end that this first switch links to each other with these a plurality of led chips is resistance of series connection further.
6. alternating-current light emitting diode lighting device as claimed in claim 1; It is characterized in that; This electrode comprises four contact points, comprises the first led chip group, the second led chip group in these a plurality of led chips; The 3rd led chip group; The connected mode of a plurality of led chips in these three led chip groups is earlier reverse parallel connection, series connection more in twos, and the two ends of three led chip groups of this after the series connection, this first led chip group are connected in the node of the second led chip group and the node that the second led chip group is connected in the 3rd led chip group, are electrically connected with four contact points of this electrode respectively.
7. alternating-current light emitting diode lighting device, it comprises:
A heat-radiating substrate;
A plurality of being arranged on this heat-radiating substrate and the led chip of series connection, these a plurality of led chips are connected with this heat-radiating substrate is hot;
A circuit layer, this circuit layer is arranged on this heat-radiating substrate, and these a plurality of led chips and the electric connection of this circuit layer;
An encapsulated layer, this encapsulated layer coat these a plurality of led chips and reach at least partly this circuit layer;
One is arranged on this heat-radiating substrate and exposes the electrode outside this encapsulated layer to the open air, and this electrode comprises at least three contact points;
A driver element; It comprises a transformer and a bilateral switch; This transformer has an input and an output; This input is used for being connected with an AC power; This output electrically connects by the electrode on this bilateral switch and this heat-radiating substrate; This bilateral switch has first switch near this transformer and reaches the second switch near these a plurality of led chips; The input of this first switch is optionally connected so that this driver element is exported the driving voltage of different sizes to these a plurality of led chips with the output of this transformer; The output of this second switch optionally with these a plurality of led chips in part or all electrically connect first diode of the forward conduction of connecting between the output of this first switch and the input of this second switch, and second diode of the reverse conducting of connecting between the negative pole end of the output of this first switch and these a plurality of led chips of connecting; Connect between one end points of this transformer output and the input of this second switch the 3rd diode of a forward conduction, and the 4th diode of a reverse conducting of series connection between the negative pole end of this end points of this transformer output and these a plurality of led chips of connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102366438A CN102338319A (en) | 2010-07-26 | 2010-07-26 | Alternating-current LED (light emitting diode) illumination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102366438A CN102338319A (en) | 2010-07-26 | 2010-07-26 | Alternating-current LED (light emitting diode) illumination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102338319A true CN102338319A (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102366438A Pending CN102338319A (en) | 2010-07-26 | 2010-07-26 | Alternating-current LED (light emitting diode) illumination device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318505Y (en) * | 1997-12-15 | 1999-05-12 | 陈胜宏 | Energy-saving lamp with changeable colour |
| CN2754308Y (en) * | 2004-11-26 | 2006-01-25 | 泰沂科技股份有限公司 | Driving device for directly driving bridge structure LED using AC power source |
| US20070008721A1 (en) * | 2005-07-08 | 2007-01-11 | Baycom Opto-Electronics Technology Co., Ltd. | Light string having alternating current light-emitting diodes |
| CN201262372Y (en) * | 2008-09-04 | 2009-06-24 | 严钱军 | AC LED light source device |
-
2010
- 2010-07-26 CN CN2010102366438A patent/CN102338319A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318505Y (en) * | 1997-12-15 | 1999-05-12 | 陈胜宏 | Energy-saving lamp with changeable colour |
| CN2754308Y (en) * | 2004-11-26 | 2006-01-25 | 泰沂科技股份有限公司 | Driving device for directly driving bridge structure LED using AC power source |
| US20070008721A1 (en) * | 2005-07-08 | 2007-01-11 | Baycom Opto-Electronics Technology Co., Ltd. | Light string having alternating current light-emitting diodes |
| CN201262372Y (en) * | 2008-09-04 | 2009-06-24 | 严钱军 | AC LED light source device |
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Effective date of abandoning: 20120201 |
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