CN101385394A - Lighting device with controllable light intensity - Google Patents
Lighting device with controllable light intensity Download PDFInfo
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- CN101385394A CN101385394A CN200780005408.6A CN200780005408A CN101385394A CN 101385394 A CN101385394 A CN 101385394A CN 200780005408 A CN200780005408 A CN 200780005408A CN 101385394 A CN101385394 A CN 101385394A
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Abstract
It is presented a lighting device comprising: at least one alternating current source configured to provide alternating current of at least a first and a second frequency, at least one light source, at least one impedance unit connected to the light source, affecting a first current from the at least one alternating current source to flow through the at least one light source, wherein an impedance of the impedance unit is configured to be frequency controlled, such that when the alternating current is of the first frequency the first current is relatively high and when the alternating current is of the second frequency the first current is relatively low. A corresponding display device, television device and method are also presented.
Description
Technical field
The present invention relates to lighting apparatus, and be particularly related to the luminous intensity of control light-emitting diode.
Background technology
Light-emitting diode (LED) can be used to many purposes.One of them purpose is to provide back lighting for LCD (LCD) TV.Usually utilize other TV tech to generate light as the part that image presents.For example, in the cathode ray tube (CRT) TV, electronics is penetrated on fluorescent screen so that present video image to the user, wherein generates light in the same treatment that described video image is presented.But, utilize LCD in the LCD TV to carry out image and present and can't produce light inherently, and or need perhaps more commonly need light source from the reverberation in room, thereby make the user can under sufficiently high luminous intensity, watch described video image.
In the prior art, known that use LED or fluorescent lamp are as being used for the backlight of LCD TV.
Use LED usually to cause complicated matrix structure in backlight, described matrix structure has the active switch that is used for driving and controlling described LED.Especially, realizing such as scanning, dimming and during local feature highlighted, it is complicated more that above topology becomes.Need large-area printed circuit board (PCB) (PCB) to connect all the said equipments in practice.Do like this and caused to make described too expensive expensive problem backlight.Therefore, need be at the solution of simple and cheap LED control.
In backlight, use the problem of fluorescent lamp to be, describedly backlightly all need an inverter (power supply) for each fluorescent lamp.Because inverter is quite expensive, therefore wish to reduce the number of required inverter.
Summary of the invention
According to foregoing, an object of the present invention is to solve or alleviate at least problem discussed above.
On the whole, above-mentioned purpose is to realize by appended independent patent claim.
A first aspect of the present invention is a kind of lighting apparatus, and it comprises: at least one ac current source, and it is configured to provide the alternating current with at least the first and second frequencies; At least one light source; At least one impedance unit, it is connected to this light source, thereby feasible first electric current from this at least one ac current source flows through this at least one light source, wherein, the impedance of described impedance unit is configured to be subjected to FREQUENCY CONTROL, thereby make that described first electric current is higher relatively when described alternating current has first frequency, and make that described first electric current is relatively low when described alternating current has second frequency.This first aspect provides a kind of plain mode of controlling the luminous intensity of light source, and described light source for example can form the part backlight of LCD display.Compare with the comparatively complicated and/or expensive prior art solution at luminous intensity control, of the present invention this reduced cost on the one hand.
Described lighting apparatus can comprise: comprise first light emitting diode string of at least one light source, this at least one light source comprises the light-emitting diode that is configured to allow first electric current to flow on first direction; And second light emitting diode string that comprises at least one light source, this at least one light source comprises the light-emitting diode that is configured to allow second electric current to flow on second direction, wherein this second direction is different from described first direction.Utilize two LED strings, electric current can flow on whole both directions of described LED equipment, thereby allows more simply assembling.
Described first light emitting diode string can be connected in parallel with described impedance unit, and described second light emitting diode string also can be connected in parallel with described impedance unit.Be arranged in parallel luminous intensity that only allow to use an impedance unit to control whole LED equipment.
Described lighting apparatus can comprise a plurality of light emitting diode devices, wherein each described light emitting diode device comprises at least one light source and at least one impedance unit, described each light emitting diode device is connected in series, thereby form a light emitting diode device band, wherein this light emitting diode device band can be connected to described at least one ac current source at least one of them.The series of LED equipment that can advantageously be connected in series will use in the environment of described lighting apparatus therein thereby allow to produce efficiently and be assembled into simply.
A plurality of described light emitting diode device bands can be connected in parallel.By a plurality of LED device strips that are connected in parallel, the single current source can drive all LED device strips.
For any frequency that can generate by described ac current source, the impedance of the described impedance unit of all light emitting diode devices can be identical in fault tolerance, and an ac current source can be provided as all described light emitting diode device bands alternating current is provided.By have identical impedance for all impedance units (in fault tolerance) under any frequency, all LED equipment can be controlled simultaneously and will be had similar behavior.In addition, will make and produce more simply and more economically by have identical standard for all LED equipment.
Impedance between the impedance unit of each light emitting diode device in each light-emitting diode band can be different, and an ac current source can be provided as all described light emitting diode device bands alternating current is provided.Utilize described different impedance, can realize independent control by being offset described frequency.
Impedance between the impedance unit of each light emitting diode device in each light-emitting diode band can be different, and an ac current source can be provided as each described light emitting diode device band alternating current is provided.Can provide control by have a current source for each band to the refinement of the luminous intensity in each LED equipment.
In in the middle of described a plurality of light-emitting diode bands each, for any frequency that can generate by described ac current source, can in fault tolerance, have identical impedance at the described impedance unit of the light emitting diode device of the corresponding position of each band.Under any frequency, have identical impedance by the specification of the impedance unit of corresponding position is specified to, can control the luminous intensity of corresponding LED equipment simultaneously.Aim at if described LED band is parallel, then allow to produce at an easy rate the scanning effect.
Described light emitting diode device band can be implemented on the printed circuit board (PCB).Use PCB to simplify and produce and the feasible comparatively economy of producing.
In the middle of described at least one light source each can be a fluorescent lamp.Fluorescent lamp is also benefited from control more efficiently, thereby can reduce the number of required inverter.
Described lighting apparatus can comprise a plurality of many lamp drivers, and wherein each many lamp driver can comprise AC power, a plurality of impedance unit, and these many lamp drivers can be configured to a plurality of fluorescent lamp power supplies.
Described impedance unit can comprise first capacitor that is connected in parallel with inductor.This is a kind of ball bearing made using of impedance of tolerance frequency control.
Described impedance unit may further include second capacitor that is connected in series with described inductor.Connect this second capacitor and can prevent that direct current from flowing through this impedance unit.
Described lighting apparatus can have the form backlight that is used for liquid crystal display television.Very useful way is can control backlight and can produce very economically still simultaneously that this is backlight.
A second aspect of the present invention is a kind of display device, and it comprises LCD and lighting apparatus according to a first aspect of the invention.
A third aspect of the present invention is a kind of television equipment, and it comprises display device according to a second aspect of the invention.
A fourth aspect of the present invention is a kind of method that is used to control the luminous intensity of lighting apparatus, and this method may further comprise the steps: at least one ac current source is set, and it is configured to provide the alternating current with at least the first and second frequencies; Connect at least one light source; Connect at least one impedance unit, it is connected to this light source, thereby makes first electric current from this at least one ac current source flow through this at least one light source; Utilize FREQUENCY CONTROL to control the impedance of this impedance unit, thereby make that described first electric current is higher relatively when described alternating current has first frequency, and make that described first electric current is relatively low when described alternating current has second frequency.
By following detailed disclosure, appended dependent claims and accompanying drawing, other purposes of the present invention, feature and advantage will become apparent.
In general, unless definition separately clearly in this article, otherwise should explain all terms that in claims, use according to its its ordinary meaning in technical field.Unless Stated otherwise clearly, otherwise should be construed as denoting at least one example of described element of generation, equipment, parts, device, step or the like in the place that all mention "/described [element, equipment, parts, device, step or the like] " openly.Unless statement clearly, otherwise needn't carry out each step of disclosed any method here according to disclosed accurate order.
Description of drawings
Embodiments of the invention are described below with reference to accompanying drawings in further detail, wherein:
Fig. 1 shows exemplary impedance according to an embodiment of the invention unit.
Fig. 2 shows the LED unit with the control unit that is associated according to an embodiment of the invention.
How the electric current that Fig. 3 shows the LED that flows through is subjected to the influence of the frequency in the LED unit shown in Fig. 2.
Fig. 4 a and 4b show two kinds of different settings such as the LED unit of the LED unit of Fig. 2.
Fig. 5 shows two LED unit that are configured to allow the gamut of DC control according to an embodiment of the invention.
Fig. 6 A and 6B show the embodiments of the invention that use fluorescent lamp.
Embodiment
Fig. 1 shows exemplary impedance according to an embodiment of the invention unit 106.This impedance unit 106 comprises first capacitor 112 and the inductor 111 that is connected in parallel.Alternatively, second capacitor 110 is connected in series the DC electric current of this impedance unit 106 so that blocking-up is flowed through with this inductor 111.As itself was known in the prior art, when described impedance unit 106 was connected to alternating current (AC), the impedance of described circuit changed as the function of the frequency of described alternating current.Under the situation such as shown circuit here, described impedance unit has a characteristic frequency, and the impedance of this impedance unit is issued to peak value in this characteristic frequency, and this frequency is known as resonance frequency, perhaps is known as the high impedance frequency of this impedance unit.Described resonance frequency depends on the electric capacity and the inductance of capacitor 110,112 and inductor 111.Though simple lc circuit shown here, it only is to be used for making those skilled in the art can realize or use an example of the present invention.Therefore, the invention is not restricted to the impedance unit of the above-mentioned type, it can be the circuit of any kind with impedance of FREQUENCY CONTROL.
With reference to Fig. 2, impedance unit 206 (such as the impedance unit 106 of Fig. 1) is connected with at least two LED connection in series-parallel.The one LED string is made of LED 205a and 205b, and it is luminous when electric current flows downward, and blocks described electric current when electric current upwards flows.On the other hand, the LED 205c and the 205d of the 2nd LED string are set up in the opposite direction, and it is luminous when described electric current upwards flows, and blocks downward electric current.The LED205a-d that is connected to described impedance unit 206 constitutes LED unit 208.Control unit 201 is alternating current (AC) source or alternating-current voltage source, and its control flows is through frequency, amplitude and the DC side-play amount of this alternating current of described LED unit 208.With further reference to Fig. 3, as the frequency of described electric current resonance frequency F near described impedance unit 206
ResThe time, the impedance phase of this impedance unit 206 is to higher.The LED 205a-d so described electric current is comparatively easily flowed through, thus higher electric current relatively caused.As can be seen from Figure 3, described electric current is at frequency F
Res303 places reach peak value, wherein F
ResBe the resonance frequency of described impedance unit 206, its value is I
Max302.In other words, described LED is F in the frequency of described AC
ResThe time have its highlight strength.Therefore, by controlling the frequency of described alternating current, can only utilize simple and cheap parts to control the luminous intensity of described LED unit 208.Though do not have shown in Figure 2ly, for each LED string an impedance unit can be arranged, wherein each impedance unit and each LED are connected in series.
In Fig. 4 a as can be seen, a plurality of LED unit 422a, 422b ..., 422z and control unit 421a are connected in series.These parts can all be combined on printed circuit board (PCB) (PCB) the band 420a together.Correspondingly, the 2nd PCB band 420b comprises control unit 421b and LED unit 423a, 423b ..., 423z.Therefore can make up arbitrary number the PCB band (comprising 420z, it comprises control unit 421z and LED unit 429a, 429b ..., 429z) so that be formed for the backlight of LCD TV.Described PCB band can be horizontally disposed with, vertically be provided with, radially be provided with, diagonal angle setting or be provided with according to other suitable modes arbitrarily.Should be noted that each PCB band can hold the LED unit of arbitrary number.
If the resonance frequency of each the LED unit in each PCB band is configured to differ from one another, then in fact produces a matrix, thereby allow luminous intensity is carried out two dimension control.The luminous intensity of whole PCB band is subjected to the influence corresponding to the amplitude of the AC of the PCB band of being discussed.The bandpass characteristics of each the LED unit in band can be overlapping alternatively, so that adapt at described specific light backlight output demand.For example, need be from a zone to another zone seamlessly transit the time may need the overlapping of this bandpass characteristics.
Fig. 4 b shows and only is used to the simplification setting that dims and scan.Here only need a control unit, thereby reduced cost.So a PCB band 430a comprises LED unit 432a, 432b ..., 432z.The 2nd PCB band 430b comprises LED unit 433a, 433b ..., last the PCB band 430z in the middle of the 433z, the PCB band of arbitrary number then comprises LED unit 439a, 439b ..., 439z.Under this set, a control unit 431 provides electric current for all PCB bands, thereby can't control this electric current at single band.On the other hand, can be by the frequency of controlling described electric current for the different LED unit controls luminous intensity in each lamp band.In one embodiment, the resonance frequency of each LED unit at the same position place of each band is selected to identical (in given fault tolerance, such as 1,5 or 10%).For example, 432a, 433a are selected to 439a has identical resonance frequency, and 432b, 433b are selected to 439b has identical resonance frequency, and the rest may be inferred in the back.Do permission like this each corresponding LED unit is controlled simultaneously, thereby obtain carrying out the ability of the effect such as scanning (horizontal lamp line).In addition,, can influence the luminous intensity of all LED unit simultaneously, promptly dim all LED unit by changing the amplitude of described electric current.In another embodiment, all LED unit all are selected to and have identical resonance frequency.Though the control that this configuration allowed is less, it may be a cost effective configuration more aspect production.Though each the PCB band among Fig. 4 b is connected in parallel, another kind of possible configuration is each PCB band of cascade or cascade and the combination that is connected in parallel.
So far only mention described control unit and can control the amplitude and the frequency of its alternating current that produces.By adding direct current (DC) skew, described control unit can also be controlled colour balance.Fig. 5 shows the first and second LED unit 508,518, and it is connected respectively to first and second control units 501/511, and has first and second impedance units 506/516 respectively.The one LED unit 508 has red LED 505a, 505b on a sense of current, and has blue led 505c, 505d on opposite current flow direction.The 2nd LED unit only has green LED 515a-d.If first control unit applies downward DC skew, then described red LED will produce bigger slightly luminous intensity.Correspondingly, the skew of the DC on the rightabout will produce more blue light.For the 2nd LED unit 518, depart from any DC skew of 0 and all will cause green intensity to increase.Therefore, can be offset by the DC of above-mentioned two LED unit and control colour balance efficiently.Those skilled in the art are easy to recognize, can regulate other colored led configurations, still provide DC controlled colour balance simultaneously.For example can use its color for red, green, blue and white LED, perhaps also can use other colors, amber such as in described configuration, comprising.
Fig. 6 a shows wherein, and the combined with fluorescent lamp uses one embodiment of the present of invention.Though used fluorescent lamp in this embodiment, also can use the light source of any support bidirectional current, such as bulb.Control unit 601 also is known as inverter, and it is ac current source or alternating-current voltage source.Three impedance unit 606a-c (such as the impedance unit 106 of Fig. 1) are arranged in this embodiment, as top explain in conjunction with Fig. 3, the frequency of the voltage that is provided is provided in its impedance.Described control unit 601 and impedance unit 606a-c are the parts of many lamp drivers 609.As its name hints, these many lamp drivers can drive a plurality of lamps (being three lamp 607a-c in this embodiment), its luminous intensity depends on the impedance of the impedance unit 606a-c of the correspondence that is connected, and the frequency from the voltage of described control unit 601 is depended in described impedance again.Therefore, might design a kind of many lamp drivers 609, these many lamp drivers have suitable frequency characteristic to drive the fluorescent lamp 607a-c that is connected, and its mode is similar to top in conjunction with the described mode of LED.The lamp that should be noted that any number all falls within the scope of the invention.The duty ratio of described lamp 607a-c be about 33% or littler situation under, the setting shown in Fig. 6 a only needs an inverter 601 to drive all three lamps.In a kind of traditional setting, each lamp is connected to independently inverter.Therefore, being provided with shown in Fig. 6 a is reduced to 1/3rd of tradition setting to the demand for inverter, thereby reduced cost and availability.
Fig. 6 b shows an embodiment who wherein adopts a plurality of many lamp drivers 609a-c.In this embodiment, each many lamp drivers 609a-c drives three lamps.Many lamp drivers 609a drives lamp 607a-c; Many lamp drivers 609b drives lamp 607d-f; Many lamp drivers 609c drives lamp 607g-i.Should be noted that for for the purpose of clear, complete circuit here is not shown.All many lamp drivers 609a-c are by backlight control unit 640 controls.This backlight control unit 640 can also use vertical synchronization, from described bulk of optical feedback backlight and/or from described Temperature Feedback backlight as input to be considered.Output from backlight control unit 640 is the FREQUENCY CONTROL that is provided for described each many lamp driver.The layout of lamp 607a-i makes each row have the lamp from each described many lamp drivers 609a-c.For example, in first portable lighter, lamp 607a is connected to many lamp drivers 609a; Lamp 607d is connected to many lamp drivers 609b; Lamp 607g is connected to many lamp drivers 609c.
Above main the present invention has been described with reference to several embodiment.But those skilled in the art can be easy to recognize, have equally in the scope of the present invention that is limited by appended patent claims except top other embodiment disclosed.
Claims (18)
1, a kind of lighting apparatus comprises:
At least one ac current source (201,420a-z, 4301-z, 501,511,601), it is configured to provide the alternating current with at least the first and second frequencies;
At least one light source;
At least one impedance unit (106,206,606a-c), it is connected to described light source, thereby makes first electric current from described at least one ac current source flow through described at least one light source,
Wherein, described impedance unit (106,206, impedance 606a-c) is configured to be subjected to FREQUENCY CONTROL, thereby make that described first electric current is higher relatively when described alternating current has described first frequency, and make that described first electric current is relatively low when described alternating current has described second frequency.
2, according to the lighting apparatus of claim 1, wherein, described lighting apparatus comprises: comprise first light emitting diode string of at least one light source, this at least one light source comprises the light-emitting diode (205c-d) that is configured to allow first electric current to flow on first direction; And second light emitting diode string that comprises at least one light source, this at least one light source comprises the light-emitting diode (205c-d) that is configured to allow second electric current to flow on second direction, described second direction is different from described first direction.
3, according to the lighting apparatus of claim 2, wherein, described first light emitting diode string and described impedance unit (106,206) are connected in parallel, and described second light emitting diode string and described impedance unit (106,206) are connected in parallel.
4, according to arbitrary lighting apparatus in the middle of the claim 2 to 3, comprise a plurality of light emitting diode devices (208,422a-z, 423a-z, 429a-z, 432a-z, 433a-z, 439a-z, 508,518), wherein each described light emitting diode device comprises at least one light source and at least one impedance unit, and described light emitting diode device is connected in series, thereby form light emitting diode device band (420a-z, 430a-z), (420a-z 430a-z) is connected to described at least one ac current source (201 to wherein said light-emitting diode band, 420a-z, 4301-z, 501,511) at least one of them.
5, according to the lighting apparatus of claim 4, wherein, (420a-z's a plurality of described light emitting diode device bands 430a-z) is connected in parallel.
6, according to the lighting apparatus of claim 4 or 5, wherein, for can be by described ac current source (201,420a-z, 4301-z, 501,511) any frequency of Sheng Chenging, and all light emitting diode devices (208,422a-z, 423a-z, 429a-z, 432a-z, 433a-z, 439a-z, the impedance of impedance unit 508,518) (106,206) is identical in fault tolerance, and ac current source (201,420a-z, 4301-z, 501,511) (420a-z 430a-z) provides alternating current to be provided as all described light emitting diode device bands.
7, according to the lighting apparatus of claim 4 or 5, wherein, each light-emitting diode band (420a-z, 430a-z) Nei each light emitting diode device (208,422a-z, 423a-z, 429a-z, 432a-z, 433a-z, 439a-z, 508,518) the impedance difference between the impedance unit (106,206), and ac current source (201,420a-z, 4301-z, 501,511) (420a-z 430a-z) provides alternating current to be provided as all described light emitting diode device bands.
8, according to the lighting apparatus of claim 4 or 5, wherein, each light-emitting diode band (420a-z, 430a-z) Nei each light emitting diode device (208,422a-z, 423a-z, 429a-z, 432a-z, 433a-z, 439a-z, 508,518) the impedance difference between the impedance unit (106,206), and ac current source (201,420a-z, 4301-z, 501,511) (420a-z 430a-z) provides alternating current to be provided as each described light emitting diode device band.
9, according to the lighting apparatus of claim 4 or 5, wherein, (420a-z is 430a-z) in Dang Zhong each at described a plurality of light-emitting diode bands, for can be by described ac current source (201,420a-z, 4301-z, 501,511) any frequency of Sheng Chenging, each band (420a-z, the light emitting diode device of corresponding position 430a-z) (208,422a-z, 423a-z, 429a-z, 432a-z, 433a-z, 439a-z, 508,518) impedance unit (106,206) has identical impedance in fault tolerance.
10, according to arbitrary lighting apparatus in the middle of the claim 4 to 9, wherein, (420a-z 430a-z) is implemented on the printed circuit board (PCB) described light emitting diode device band.
11, according to the lighting apparatus of claim 1, wherein, each in the middle of described at least one light source is fluorescent lamp (607a-c).
12, according to the lighting apparatus of claim 11, comprise a plurality of many lamp drivers, wherein each many lamp driver comprises AC power (601), a plurality of impedance unit (606a-c), described many lamp drivers are configured to a plurality of fluorescent lamps (607a-c) power supply.
13, according to arbitrary lighting apparatus in preceding claim, wherein, described impedance unit (106,206,606a-c) comprise first capacitor (112) that is connected in parallel with inductor (111).
14, according to the lighting apparatus of claim 13, wherein, described impedance unit (106,206,606a-c) further comprise second capacitor (110) that is connected in series with described inductor (111).
15, according to arbitrary lighting apparatus in the middle of the claim 1 to 14, it has the form backlight that is used for liquid crystal display television.
16, a kind of display device comprises LCD and according to arbitrary lighting apparatus in the middle of the claim 1 to 15.
17, a kind of television equipment comprises the display device according to claim 16.
18, a kind of method that is used to control the luminous intensity of lighting apparatus said method comprising the steps of:
At least one ac current source (201,420a-z, 4301-z, 501,511,601) is set, and it is configured to provide the alternating current with at least the first and second frequencies;
Connect at least one light source;
(106,206,606a-c), it is connected to described light source, thereby makes first electric current from described at least one ac current source flow through described at least one light source to connect at least one impedance unit;
Utilize FREQUENCY CONTROL to control described impedance unit (106,206, impedance 606a-c), thus make that described first electric current is higher relatively when described alternating current has described first frequency, and make that described first electric current is relatively low when described alternating current has described second frequency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06101620.0 | 2006-02-14 | ||
| EP06101620 | 2006-02-14 | ||
| EP06126775.3 | 2006-12-21 |
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| CN101385394A true CN101385394A (en) | 2009-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200780005408.6A Pending CN101385394A (en) | 2006-02-14 | 2007-01-31 | Lighting device with controllable light intensity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345808A (en) * | 2010-08-04 | 2012-02-08 | 富士迈半导体精密工业（上海）有限公司 | Light emitting diode (LED) illumination device |
| CN102345806A (en) * | 2010-08-04 | 2012-02-08 | 富士迈半导体精密工业（上海）有限公司 | LED (light emitting diode) illumination device |
| WO2013016882A1 (en) * | 2011-08-02 | 2013-02-07 | 深圳市华星光电技术有限公司 | Led light bar and use thereof in display device |
| CN103503573A (en) * | 2012-04-09 | 2014-01-08 | 爱模***有限公司 | Led lamp and lighting device including LED lamp |
| CN105432144A (en) * | 2013-07-24 | 2016-03-23 | 皇家飞利浦有限公司 | Power supply for LED lighting system |
-
2007
- 2007-01-31 CN CN200780005408.6A patent/CN101385394A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345808A (en) * | 2010-08-04 | 2012-02-08 | 富士迈半导体精密工业（上海）有限公司 | Light emitting diode (LED) illumination device |
| CN102345806A (en) * | 2010-08-04 | 2012-02-08 | 富士迈半导体精密工业（上海）有限公司 | LED (light emitting diode) illumination device |
| WO2013016882A1 (en) * | 2011-08-02 | 2013-02-07 | 深圳市华星光电技术有限公司 | Led light bar and use thereof in display device |
| CN103503573A (en) * | 2012-04-09 | 2014-01-08 | 爱模***有限公司 | Led lamp and lighting device including LED lamp |
| CN103503573B (en) * | 2012-04-09 | 2015-04-01 | 爱模***有限公司 | Led lamp and lighting device including LED lamp |
| CN105432144A (en) * | 2013-07-24 | 2016-03-23 | 皇家飞利浦有限公司 | Power supply for LED lighting system |
| CN105432144B (en) * | 2013-07-24 | 2017-08-11 | 飞利浦照明控股有限公司 | Power supply for LED illumination system |
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