CN103912801A - LED (light emitting diode) light source - Google Patents
LED (light emitting diode) light source Download PDFInfo
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- CN103912801A CN103912801A CN201310005376.7A CN201310005376A CN103912801A CN 103912801 A CN103912801 A CN 103912801A CN 201310005376 A CN201310005376 A CN 201310005376A CN 103912801 A CN103912801 A CN 103912801A
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Abstract
The invention provides an LED light source. The LED light source comprises a thermal conductive substrate, and at least two LED chip strings which are connected in series are packaged on the thermal conductive substrate, a linear high-voltage LED driving chip for adjusting the lighting state of the LED chip strings according to input voltage is also packaged on the thermal conductive substrate and connected with the LED chip strings; the LED chip strings are composed of a plurality of LED chips which are connected in a series mode or a series and parallel combined mode; the linear high-voltage LED driving chip is a driving integrated circuit for controlling the linear high-voltage LED chip strings through the input voltage. According to the LED light source, the LED chip strings and the linear high-voltage LED driver are integrated on the thermal conductive substrate, and full integration of an LED source and a driver so that an LED lighting product comprising the LED light source does not need switch-on and switch-off of the power source and the driver, further the structure of an LED lamp can be simplified, and the production cost can be greatly reduced.
Description
Technical field
The present invention relates to light emitting diode (Light Emitting Diode, hereinafter to be referred as: LED) lighting field, relates in particular to a kind of LED light source.
Background technology
The feature that LED light source is high with its efficiency, the life-span is long becomes the main product of new generation of green illumination.Due to the characteristic of the low-voltage of LED own and one-way conduction, in the time using civil power driving LED, line voltage need to be changed into the DC voltage that LED light source can be used, and control the electric current by LED simultaneously.At present, the feature that Switching Power Supply is high with its efficiency, relative volume is little becomes the first-selected power supply of LED illuminating product.But Switching Power Supply all comprises the larger device of these volumes of electrolytic capacitor, transformer or inductor, be not only difficult to make the volume of LED light source further to reduce, and be also far smaller than the service life of LED light source the service life of Switching Power Supply.
On market, the LED lighting of some companies adopts Linear Driving now, overcome to a certain extent the shortcoming that Switching Power Supply volume is large, the life-span is short, but the LED illuminating product on market still uses the LED light source of configuration Standalone Drives, and configure independently driver, the shortcomings such as LED light fixture complicate fabrication process, weak heat-dissipating, reliability are low are not solved effectively.
Summary of the invention
The object of the invention is to solve the shortcoming of above-mentioned LED illuminating product, provide a kind of driver and LED are integrated in to the fully integrated LED light source on heat-conducting substrate.
A kind of LED light source, comprise heat-conducting substrate, on described heat-conducting substrate, be packaged with at least two sections of LED serial core sheets that connect with series connection form, the linear low density LED being also packaged with on described heat-conducting substrate for adjust LED serial core sheet luminance according to input voltage drives chip, and described linear low density LED drives chip to be connected with LED serial core sheet;
Described LED serial core sheet is the LED serial core sheet being made up of with series connection form some LED crystal grain or the LED serial core sheet forming with the form of series and parallel connections combination.
It is to go here and there luminous drive integrated circult by least two sections of LED of input voltage control that described linear low density LED drives chip.
Further, be also welded with the current-limiting resistance for adjusting LED serial core sheet operating current on described heat-conducting substrate, described current-limiting resistance drives chip to be connected with described linear low density LED.
Further, be also packaged with rectifier bridge stack chip on described heat-conducting substrate, rectifier bridge stack chip is connected with the commercial power interface being arranged on heat-conducting substrate, and described rectifier bridge stack chip drives chip to be connected with linear low density LED.
Further, the base material of described heat-conducting substrate is aluminium, aluminium alloy, copper, copper alloy or pottery; The substrate surface of heat-conducting substrate immobilising device face is coated with one deck heat conductive insulating layer, and its thickness range is 1 to 1000 micron; On described heat conductive insulating layer, be distributed with the metallic film conductor for welding and the electrical connection of device.
Further, described LED light source directly uses city's electric drive.
LED light source provided by the invention, by the linear low density LED driver of at least two sections of LED serial core sheets and the described LED string of control chip light emitting is integrated on heat-conducting substrate jointly, realize the fully integrated of LED light source and driver, make LED light source become the electrically driven (operated) standalone module in direct use city, adopt LED illuminating product of the present invention no longer to need Switching Power Supply or driver, the volume that has reduced LED illuminating product, has improved reliability, has greatly simplified production process.Simultaneously because the heat-conducting substrate of LED light source is directly fixed on fin, the heat that each device on heat-conducting substrate produces can directly be derived by fin, thereby reduce the operating temperature (higher operating temperature can reduce the service life of electronic device) of LED light source, improved the while in service life of LED illuminating product and also further reduced production cost.
Accompanying drawing explanation
Fig. 1 is the bulb structure schematic diagram that includes LED light source of the present invention;
Fig. 2 is LED light source structural representation of the present invention;
Fig. 3 is heat-conducting substrate cross section structure schematic diagram of the present invention;
Fig. 4 is LED light source electrical block diagram of the present invention.
Description of reference numerals: 1-LED string, 2-heat-conducting substrate, 21-heat conductive insulating layer, 22-Copper Foil conductor, 23-base material, 3-linear low density LED drives chip, 4-driving element, 5-current-limiting resistance, 6-commercial power interface, 7-rectifier bridge stack, 8-wire, 9-lampshade, 10-power interface, 11-fin, 12-thin wire, 13-LED light source, 14-packaging area, 15-LED packaging plastic.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the bulb structure schematic diagram that includes LED light source of the present invention, as shown in Figure 1, LED light source 13 is built in lampshade 9, the linear low density LED driver that is packaged with at least two sections of LED serial core sheets 1 on the heat-conducting substrate 2 of LED light source 13 and drives chip 3, rectifier bridge stack chip 7 and current-limiting resistance 5 to form by linear low density LED, described LED serial core sheet 1 is the LED serial core sheet being made up of with series connection form some LED crystal grain or the LED serial core sheet forming with the form of series and parallel connections combination, and described LED serial core sheet is more much higher than conducting voltage single led or LED crystal grain.From accompanying drawing 2, can find out, LED light source 13 is directly connected by wire 8 with power interface 10, and the heat-conducting substrate 2 of LED light source 13 is directly fixed on the fin 11 of bulb.
Fig. 2 is LED light source structural representation of the present invention, as shown in Figure 2, LED light source 13 of the present invention comprises heat-conducting substrate 2, on heat-conducting substrate 2, be provided with a packaging area 14 (square frame shown in dotted line is packaging area 14), in this packaging area 14, be fixed with rectifier bridge stack chip 7, linear low density LED drives chip 3, at least two sections of LED serial core sheets 1, by reference to the accompanying drawings 3 and accompanying drawing 2 shown in, chip in packaging area 14 is interconnected finally and is covered the whole packaging area 14 of sealing with packaging plastic by thin wire 12, chip and its outside components and parts in the outside and inner metallic film conductor 22 connection encapsulation regions that have conducting of packaging area 14.On the outer heat-conducting substrate 2 of this packaging area 14, be welded with commercial power interface 6 (or being reserved pad), current-limiting resistance 5.Described commercial power interface 6 connects rectifier bridge stack chip 7, and rectifier bridge stack chip 7 connects linear high-voltage LED and drives chip 3, and linear low density LED drives chip 3 to connect LED serial core sheet 1, and current-limiting resistance 5 drives chip 3 to be connected with linear low density LED.
Described LED serial core sheet 1 interconnects with series connection form, the positive terminal of next section of LED serial core sheet 1 of negative pole termination of LED serial core sheet 1.
Described linear low density LED drives chip 3 for adjust the luminance of LED serial core sheet 1 according to input voltage, and it is a kind of by the drive integrated circult of at least two sections of LED serial core sheets of Control of Voltage that described linear low density LED drives chip 3.Linear low density LED drives chip 3 can adjust according to the variation of input voltage the luminance of each section of LED serial core sheet.In the time that voltage is elevated to the required voltage of first paragraph LED serial core sheet conducting from zero volt, linear low density LED drives chip 3 to control first paragraph LED string chip light emitting of first paragraph LED serial core sheet conducting, other now not conductings of LED serial core sheet; When voltage continues to be elevated to first paragraph and the required voltage of second segment LED serial core sheet conducting simultaneously, linear low density LED drives chip 3 to control the conducting of second segment LED serial core sheet, simultaneously linear high-voltage LED drives chip 3 to control the current path of closing first paragraph LED serial core sheet, because first paragraph and second segment LED connect, thus now first paragraph and second segment LED serial core sheet simultaneously luminous; In the time that voltage continues to be elevated to first paragraph, second segment and the required voltage of the 3rd section of LED serial core sheet conducting simultaneously again, linear low density LED drives chip 3 to control the conducting of the 3rd section of LED serial core sheet to close the current path of first paragraph, second segment LED string simultaneously, because first paragraph, second segment and the 3rd section of LED connect, so now first paragraph, second segment and the 3rd section of LED serial core sheet are simultaneously luminous; If working method by that analogy while configuring more multistage LED serial core sheet.In the time of voltage drop, process is just in time contrary.
Described rectifier bridge stack chip 7 is the integrated circuit with all-wave or halfwave rectifier function of rectifier diode core composition; It is a kind of by the drive integrated circult of voltage-controlled at least two sections of LED string that described linear low density LED drives chip 3, and linear low density LED drives chip 3 can adjust according to the variation of input voltage the luminance of each section of LED lamp string.
In addition, with packaging technology be fixed on rectifier bridge stack chip 7 on heat-conducting substrate 2, linear low density LED drives chip 3, LED serial core sheet 1 can jointly be encapsulated in (for example packaging area 14 in the present embodiment) in a larger region, the zones of different that also can according to circumstances be encapsulated in heat-conducting substrate 2, the present invention is not restricted this.Described current-limiting resistance 5 can be encapsulated in packaging area 14 with other integrated chip, also can be fixed on the heat-conducting substrate 2 outside packaging area 14 with welding procedure, the present invention is not restricted this, but preferably current-limiting resistance 5 is fixed on outside packaging area 14 with the form of welding, its objective is the operating current of being convenient to accurate adjustment LED light source 13.
The device being fixed on heat-conducting substrate with welding procedure of the present invention all refers to Surface Mount Component, described Surface Mount Component refers to that profile is sheet, column type, cube or the abnormity of rectangle, and its welding end or pin are produced in same plane and are suitable for the electronic devices and components of surface texture technique.
LED light source structural representation of the present invention does not represent that the present invention can only be circular configuration, as long as can realize goal of the invention of the present invention all in protection scope of the present invention, the present invention does not limit this.
Application of the present invention is applied as example with LED bulb and does not represent that the present invention can only be applied to LED bulb, can also be applied to LED fluorescent tube, LED ceiling light, LED street lamp etc., and the present invention does not limit this.
The new described thin wire 12 of this practicality, for the superfine wire for being electrically connected between each unit in packaging technology, is generally spun gold, filamentary silver, copper wire or aluminium wire.
Connection between device of the present invention is the electrical connection forming by being distributed in metallic film conductor 22 on heat-conducting substrate 2 or the interior thin wire 12 of packaging area 14.
Fig. 3 is heat-conducting substrate cross section structure schematic diagram of the present invention; As shown in Figure 3, heat-conducting substrate 2 of the present invention comprises: base material 23, heat conductive insulating layer 21, metallic film conductor 22, base material 23 is placed in the bottom of heat-conducting substrate 2, is coated with heat conductive insulating layer 21 on base material 23, is distributed with metallic film conductor 22 on heat conductive insulating layer 21.Components and parts (current-limiting resistance 5, linear low density LED drive chip 3) on heat-conducting substrate 2 form electrical connection by metallic film conductor 22.
This metallic film conductor of the present invention 22 is for being distributed in the line with certain width or the region of the metallic film composition on the heat conductive insulating layer of heat-conducting substrate, being welded and fixed and being electrically connected for components and parts.Its material is generally copper, aluminium or silver.
Fig. 4 is LED light source electrical block diagram of the present invention, as shown in Figure 4, commercial power interface 6 is after rectifier bridge stack 7 rectifications, the cathode output end of rectifier bridge stack 7 connects the positive terminal of LED serial core sheet, this LED serial core sheet is composed in series by 3 sections of LED serial core sheets 1, every section of LED serial core sheet 1 both positive and negative polarity is all connected to linear low density LED drive IC 3, linear low density LED drive IC 3 and rectifier bridge stack 7 cathode output end common grounds, and described linear low density LED drive IC 3 is also connected with current-limiting resistance 5.The rectifier bridge D1 of described rectifier bridge stack 7 for being constituted by a diode; Described linear low density LED drive IC 3 is integrated circuit U1, and described current-limiting resistance 5 is made up of the resistance R 1, R2, the R3 that are connected with U1.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a LED light source, comprise heat-conducting substrate (2), on described heat-conducting substrate (2), be packaged with at least two sections of LED serial core sheets (1) that connect with series connection form, it is characterized in that, the linear low density LED being also packaged with on described heat-conducting substrate (2) for adjust LED serial core sheet (1) luminance according to input voltage drives chip (3), and described linear low density LED drives chip (3) to be connected with LED serial core sheet (1);
Described LED serial core sheet (1) is the LED serial core sheet being made up of with series connection form some LED crystal grain or the LED serial core sheet forming with the form of series and parallel connections combination;
It is by the drive integrated circult of at least two sections of LED string chip light emittings of input voltage control that described linear low density LED drives chip (3).
2. LED light source according to claim 1, it is characterized in that, on described heat-conducting substrate (2), be also packaged with the current-limiting resistance (5) for adjusting LED serial core sheet (1) operating current, described current-limiting resistance (5) drives chip (3) to be connected with described linear low density LED.
3. LED light source according to claim 1, it is characterized in that, on described heat-conducting substrate (2), be also packaged with rectifier bridge stack chip (7), rectifier bridge stack chip (7) is connected with the commercial power interface (6) being arranged on heat-conducting substrate (2), and described rectifier bridge stack chip (7) drives chip (3) to be connected with linear low density LED.
4. LED light source according to claim 1, is characterized in that, the base material of described heat-conducting substrate (2) is aluminium, aluminium alloy, copper, copper alloy or pottery; The substrate surface of heat-conducting substrate (2) immobilising device face is coated with one deck heat conductive insulating layer (21), and its thickness range is 1 to 1000 micron; On described heat conductive insulating layer (21), be distributed with the metallic film conductor (22) for welding and the electrical connection of device.
5. LED light source according to claim 1, is characterized in that, described LED light source directly uses city's electric drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005376.7A CN103912801B (en) | 2013-01-08 | 2013-01-08 | A kind of LED light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005376.7A CN103912801B (en) | 2013-01-08 | 2013-01-08 | A kind of LED light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103912801A true CN103912801A (en) | 2014-07-09 |
| CN103912801B CN103912801B (en) | 2016-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310005376.7A Active CN103912801B (en) | 2013-01-08 | 2013-01-08 | A kind of LED light source |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1215735A1 (en) * | 2000-12-13 | 2002-06-19 | Chao-Chin Yeh | Improved structure of lamp |
| DE202008016868U1 (en) * | 2008-12-19 | 2009-03-19 | Osram Gesellschaft mit beschränkter Haftung | lamp |
| CN201335285Y (en) * | 2008-11-27 | 2009-10-28 | 惠州市纯英半导体照明科技有限公司 | Combined LED illuminating device with high luminous efficiency and low brightness |
| CN202647265U (en) * | 2012-05-09 | 2013-01-02 | 佛山市国星光电股份有限公司 | Drive function integrated light-emitting diode (LED) light engine |
| CN202647362U (en) * | 2012-04-20 | 2013-01-02 | 甄钊伟 | Colorful LED (light emitting diode) decorative lighting |
| CN203068208U (en) * | 2013-01-08 | 2013-07-17 | 陕西亚成微电子股份有限公司 | Light-emitting diode (LED) light source |
-
2013
- 2013-01-08 CN CN201310005376.7A patent/CN103912801B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1215735A1 (en) * | 2000-12-13 | 2002-06-19 | Chao-Chin Yeh | Improved structure of lamp |
| CN201335285Y (en) * | 2008-11-27 | 2009-10-28 | 惠州市纯英半导体照明科技有限公司 | Combined LED illuminating device with high luminous efficiency and low brightness |
| DE202008016868U1 (en) * | 2008-12-19 | 2009-03-19 | Osram Gesellschaft mit beschränkter Haftung | lamp |
| CN202647362U (en) * | 2012-04-20 | 2013-01-02 | 甄钊伟 | Colorful LED (light emitting diode) decorative lighting |
| CN202647265U (en) * | 2012-05-09 | 2013-01-02 | 佛山市国星光电股份有限公司 | Drive function integrated light-emitting diode (LED) light engine |
| CN203068208U (en) * | 2013-01-08 | 2013-07-17 | 陕西亚成微电子股份有限公司 | Light-emitting diode (LED) light source |
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| CN103912801B (en) | 2016-12-28 |
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