CN104023452A - COB light source drive circuit and drive integrated type COB light source - Google Patents
COB light source drive circuit and drive integrated type COB light source Download PDFInfo
- Publication number
- CN104023452A CN104023452A CN201410283329.3A CN201410283329A CN104023452A CN 104023452 A CN104023452 A CN 104023452A CN 201410283329 A CN201410283329 A CN 201410283329A CN 104023452 A CN104023452 A CN 104023452A
- Authority
- CN
- China
- Prior art keywords
- light source
- rest area
- cob light
- substrate
- constant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Led Devices (AREA)
- Led Device Packages (AREA)
Abstract
The invention provides a COB light source drive circuit and a drive integrated type COB light source. The COB light source drive circuit formed by the alternating-current input end, a rectifying module, a constant-current voltage-stabilizing chip and an LED chip is adopted, and the alternating-current input end is sequentially connected with the rectifying module, the constant-current voltage-stabilizing chip and the LED chip in series. Different from a common low-voltage drive chip, the constant-current voltage-stabilizing chip can output a certain constant current stably within a fairly wide voltage input range. The constant-current voltage-stabilizing chip has the performance of adjusting the temperature, and therefore the thermal loss or entrance to an over-temperature protection forced closed state can be avoided. By the adoption of the drive circuit, the complex circuit design for the COB light source circuit is not needed, the circuit structure is greatly simplified, the circuit can be integrated into the COB light source conveniently, the drive circuit is smaller, and the availability and the stability are higher than a general circuit.
Description
Technical field
The present invention relates to a kind of lighting apparatus, refer in particular to a kind of COB light source driving circuit and drive integrated form COB light source.
Background technology
LED (light emitting diode light-emitting diode) is a kind of semiconductor that can be visible ray by electric energy conversion, the advantage such as have luminous efficiency high (LED of two watts is equivalent to the incandescent lighting of 15 watts), power consumption little (power consumption only have general lighting 1/10), the life-span is long, volume is little, is considered to revolution again of lighting source after incandescent lamp, fluorescent lamp.
But generally LED drive circuit is comparatively complicated, and circuit is short normal working hours, and conversion efficiency is not high, and these all become the short slab in LED popularization and application process.
General LED drive circuit structure is divided into wide voltage input, antisurge protection, full-bridge rectification, isolating transformer, EMC filtering, constant-current source, light modulation, the parts such as instruction of turning off the light at present; visible above-mentioned device is numerous; this intensive heat radiation that also causes too much connecting up requires too high; and the impact of the reasons such as device consistency, the stability of LED drive circuit goes through one's facings deeply.
General LED drive circuit all can be used aluminium electrolytic capacitor, but its useful life below 5000 hours, but also have much relations with environment for use temperature, 10 degrees Celsius of the every risings of ambient temperature, the electrolytic capacitor life-span will reduce half.Therefore, industry is all in the LED drive circuit solution of finding no electrolytic capacitor or substituted type.
Summary of the invention
Technical problem to be solved by this invention is: by improving LED drive circuit, thus the difficulty of avoiding in the past connecting up, heat radiation is difficult, stability is not high and the life-span is not grown problem.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of COB light source driving circuit, is made up of ac input end, rectification module, constant-current voltage-stabilizing chip and LED wafer; Described ac input end is connected in series successively with rectification module, constant-current voltage-stabilizing chip and LED wafer.
The invention still further relates to a kind of integrated form COB light source that drives, comprise substrate and the COB light source driving circuit as described in claim 1 or 2; Described substrate is provided with at least two rest areas, and the LED wafer of described COB light source driving circuit is positioned in a rest area, and described rectification module and constant-current voltage-stabilizing chip are positioned in another rest area; On substrate, be also provided with ac input end, in described substrate, be provided with circuit described ac input end is connected in series with rectification module, constant-current voltage-stabilizing chip and LED wafer.
Beneficial effect of the present invention is: in drive circuit design, adopt LED wafer to add the circuit structure of constant-current voltage-stabilizing chip, because constant-current voltage-stabilizing chip is different from common low voltage drive chip, it can stablize the certain constant current of output in quite wide input voltage range.And constant-current voltage-stabilizing chip self possesses temperature adjusting function, can avoid cause thermal damage or enter overheat protector positive closing state.By new drive circuit, no longer need above loaded down with trivial details circuit design greatly to simplify circuit formation, therefore its a whole set of driving can integrate easily as COB light source, and the more small and exquisite availability of product, stability are all higher than common product.
Brief description of the drawings
Below in conjunction with accompanying drawing in detail concrete structure of the present invention is described in detail
Fig. 1 is the circuit theory diagrams of COB light source driving circuit of the present invention;
Fig. 2 is that the present invention drives integrated form COB light-source structure schematic diagram;
Fig. 3 is that the present invention drives structural representation after integrated form COB light-source encapsulation;
Fig. 4 is that the present invention drives integrated form COB light source the first example structure schematic diagram;
Fig. 5 is that the present invention drives integrated form COB light source the second example structure schematic diagram.
1-substrate; 2-LED wafer; 3-the first rectifier diode; 4-the second rectifier diode; 5-the 3rd rectifier diode; 6-the 4th rectifier diode; 7-constant-current voltage-stabilizing chip; 8-protective layer; 9-luminescent layer; 11-the first rest area; 12-the second rest area; 13-the 3rd rest area; 14-the first pad; 15-the second pad; 16-the first boss; 17-the second boss; 18-the 3rd boss.
Embodiment
By describing technology contents of the present invention, structural feature in detail, being realized object and effect, below in conjunction with execution mode and coordinate accompanying drawing to be explained in detail.
The design of most critical of the present invention is: add constant-current voltage-stabilizing chip, rectification circuit formation drive circuit by LED wafer; by the characteristic of constant-current voltage-stabilizing chip; simplify circuit; and can not only support wide input voltage range and stable output, the effect that also possesses the cause thermal damage avoided or enter overheat protector.
The present invention relates to a kind of COB light source driving circuit, formed by ac input end, rectification module, constant-current voltage-stabilizing chip and LED wafer; Described ac input end is connected in series successively with rectification module, constant-current voltage-stabilizing chip and LED wafer.
From foregoing description, beneficial effect of the present invention is: the mode that adopts built-in constant-current voltage-stabilizing chip provides direct current for LED, do not re-use other independently components and parts, more there is no the short components and parts of transformer equivalent life, the volume that this kind of method for designing not only reduced LED light source facilitates design and the automated production of light fixture, has significantly reduced especially cost.
Embodiment 1:
In above-mentioned, described rectification module comprises bridge full-wave rectifier unit.
The concrete example of embodiment 1:
Refer to Fig. 1, disclose the COB light source driving circuit that one can directly use AC220V (or AC110V) to power, comprised the load that a constant-current voltage-stabilizing chip U1, the full-wave rectification unit being made up of four groups of rectifier diode D1/D2/D3/D4 and multiple LED wafer form.
Wherein, constant-current voltage-stabilizing chip U1 itself is just provided with the built-in constant-current source of the common composition of the accurate device such as current-limiting resistance of adjusting electric current.Described constant-current voltage-stabilizing chip U1 input is connected with rectifier diode D1, D2 and LED wafer electric, and this constant-current voltage-stabilizing chip U1 output is electrically connected with described rectifier diode D3, D4, forms load LED constant current and drives loop
Above-mentioned load LED constant current drives loop can two groups oppositely to connect together, and directly drives with civil power, and load LED constant current drives current strength in loop to reach constant current object by the built-in current-limiting resistance of constant-current voltage-stabilizing wafer U1.
In the time of concrete use, AC220V (or AC110V) is directly circuit supply by L/N, and alternating current is luminous by built-in constant-current voltage-stabilizing chip U1 and the multiple LED wafers of accessory circuit rear drive.
The invention still further relates to a kind of integrated form COB light source that drives, comprise substrate and COB light source driving circuit as above.Described substrate is provided with at least two rest areas, and the LED wafer of described COB light source driving circuit is positioned in a rest area, and described rectification module and constant-current voltage-stabilizing chip are positioned in another rest area; On substrate, be also provided with ac input end, in described substrate, be provided with circuit described ac input end is connected in series with rectification module, constant-current voltage-stabilizing chip and LED wafer.
From foregoing description, beneficial effect of the present invention is: because drive circuit is greatly simplified, therefore its various piece can be very easily with LED wafer package on a substrate, thereby it is high to form one degree, the product that volume is small and exquisite.
Embodiment 1:
Outside the rest area of described placement LED wafer, be coated with luminescent layer; Outside another rest area of described placement rectification module and constant-current voltage-stabilizing chip, be coated with the protective layer that protection glue forms.
Thus, luminescent layer can play the effect to placing LED wafer luminous intensity distribution.Protective layer can, by rectification module and the protection of constant-current voltage-stabilizing chip parcel, play the protection effects such as isolation, waterproof.
Embodiment 2:
In above-mentioned, outside the rest area of described placement LED wafer, be provided with a circle boss; Outside another rest area of described placement rectification module and constant-current voltage-stabilizing chip, be provided with a circle boss.
The setting of boss structure herein can be played and place excessive function in above-mentioned luminescent layer, protective layer forming process, thereby makes to produce more convenient.
Embodiment 3:
Described protection glue is made up of light-proof material.Protection glue adopts light tight, can avoid to greatest extent the impact of light source luminescent on components and parts in drive circuit.The particularly unsuitable sensitization of the steady operation of constant-current voltage-stabilizing chip U1 in drive circuit.
Embodiment 3:
In above-mentioned, be provided with the first pad and the second pad on described substrate, the first pad and the second pad form described ac input end; Described the first pad and the second pad are near substrate edges setting.
Ac input end is arranged on substrate edges can be conveniently and the production work of external cabling and welding.
Embodiment 4:
In above-mentioned, described rectification module comprises four groups of diodes; A described rest area is the first rest area; Described another rest area comprises the second rest area and the 3rd rest area; In described the second rest area, be placed with two groups of diodes, in the 3rd rest area, be placed with another two groups of diodes and constant-current voltage-stabilizing chip.
The benefit that another rest area is split as to two rest areas is to make the topology layout design of whole product more flexible rationally.
Concrete example:
A kind of integrated form COB light source that drives, multiple LED wafers 2 are by a border circular areas (the first rest area 11) of the substrate 1 of COB, border circular areas forms the light-emitting area of COB light source in the middle of substrate, the wafer that multiple LED wafers are wherein blue light-emitting, wavelength is at 440nm-460nm, its outer first boss 16 that is arranged with, thereby by the first boss 16 around the surperficial embedding silica gel that is mixed with different fluorescent material form luminescent layer 9, make this drive integrated form COB light source to send needed light.
The first rectifier diode 3, the second rectifier diode 4, the 3rd rectifier diode 5 and the 4th rectifier diode 6 and constant-current voltage-stabilizing chip 7 in the bridge full-wave rectifier unit of rectification module are naked wafer; several persons are bonded in respectively the second rest area 12, the 3rd rest area 13 by WB technology; outside the second rest area 12, be provided with the second boss 17; outer the 3rd boss 18 that is provided with in the 3rd rest area 13, two boss around surface protect with protection glue formation protective layer 8.
In the time of concrete use, AC220V (or AC110V) is directly the circuit supply on substrate by the first pad 14, the second pad 15 on substrate, and alternating current is luminous by built-in constant-current voltage-stabilizing chip 7 and the multiple LED wafers of accessory circuit rear drive.
Embodiment 5:
As shown in Figure 2,3, described substrate 1 is rectangular, and described the first rest area 11 is arranged at substrate 1 middle part, on the second rest area 12 and 1 liang of diagonal angle of substrate, 13 points of the 3rd rest areas; The first pad 14 of described ac input end, the second pad 15 are arranged on another two diagonal angles of substrate 1.
In the present embodiment, layout adopts LED wafer to place substrate middle part, the remaining part configuration of optimizing structure in the time that the structure of placing can be taken into account production efficiency, thus it is more small and exquisite to guarantee that product is convenient to the basic upper volume of production.
Embodiment 6:
As shown in Figure 4,5, in above-mentioned, described substrate 1 is rectangular, and described the first rest area 11 is arranged at substrate 1 middle part, the second rest area 12 and the 3rd rest area 13 arrange on one side along substrate 1, and substrate 1 arranges the first pad 14, second pad 15 of described ac input end in relative another side.
The layout core that above-described embodiment 5,6 provides is all COB light source and driving circuit section to divide and be arranged as far as possible on substrate, and its benefit that can bring is:
1, can effectively solve the impact of light source luminescent on components and parts in drive circuit.For example, unsuitable sensitization in constant-current voltage-stabilizing chip U1 characteristic in the present invention.
2,, for light source provides enough spaces, make its heat sending be transmitted to heat sink radiates by substrate, thereby reduce each too much heat burden of components and parts that drives in drive circuit.
3, effectively utilize substrate space, thereby make the later stage convenient with coordinating of light fixture.Such as in the time coordinating with reflector, the space of placing between light source and two parts of placement drive circuit just supports the use with reflector.
In sum, the present invention is by the mode of built-in constant current wafer, for LED provides direct current, do not re-use other independently components and parts, more there is no the short components and parts of transformer equivalent life, the volume that this kind of method for designing not only reduced LED light source facilitates design and the automated production of light fixture, has significantly reduced especially cost
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a COB light source driving circuit, is characterized in that: be made up of ac input end, rectification module, constant-current voltage-stabilizing chip and LED wafer; Described ac input end is connected in series successively with rectification module, constant-current voltage-stabilizing chip and LED wafer.
2. COB light source driving circuit as claimed in claim 1, is characterized in that: described rectification module comprises bridge full-wave rectifier unit.
3. drive an integrated form COB light source, it is characterized in that: comprise substrate and the COB light source driving circuit as described in claim 1 or 2; Described substrate is provided with at least two rest areas, and the LED wafer of described COB light source driving circuit is positioned in a rest area, and described rectification module and constant-current voltage-stabilizing chip are positioned in another rest area; On substrate, be also provided with ac input end, in described substrate, be provided with circuit described ac input end is connected in series with rectification module, constant-current voltage-stabilizing chip and LED wafer.
4. driving integrated form COB light source as claimed in claim 3, is characterized in that: outside the rest area of described placement LED wafer, be coated with luminescent layer; Outside another rest area of described placement rectification module and constant-current voltage-stabilizing chip, be coated with protection glue.
5. driving integrated form COB light source as claimed in claim 4, is characterized in that: described protection glue is made up of light-proof material.
6. driving integrated form COB light source as claimed in claim 3, is characterized in that: outside the rest area of described placement LED wafer, be provided with a circle boss; Outside another rest area of described placement rectification module and constant-current voltage-stabilizing chip, be provided with a circle boss.
7. driving integrated form COB light source as claimed in claim 3, is characterized in that: on described substrate, be provided with the first pad and the second pad, the first pad and the second pad form described ac input end; Described the first pad and the second pad are near substrate edges setting.
8. the driving integrated form COB light source as described in claim 3-7 any one, is characterized in that: described rectification module comprises four groups of diodes; A described rest area is the first rest area; Described another rest area comprises the second rest area and the 3rd rest area; In described the second rest area, be placed with two groups of diodes, in the 3rd rest area, be placed with another two groups of diodes and constant-current voltage-stabilizing chip.
9. the driving integrated form COB light source as described in claim 3-7 any one, is characterized in that: described substrate is rectangular, and described the first rest area is arranged at substrate middle part, and the second rest area and the 3rd is placed and distinguished on substrate two diagonal angles; Described ac input end is arranged on another two diagonal angles of substrate.
10. the driving integrated form COB light source as described in claim 3-7 any one, it is characterized in that: described substrate is rectangular, described the first rest area is arranged at substrate middle part, and the second rest area and the 3rd rest area arrange on one side along substrate, and substrate arranges described ac input end in relative another side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283329.3A CN104023452A (en) | 2014-06-23 | 2014-06-23 | COB light source drive circuit and drive integrated type COB light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410283329.3A CN104023452A (en) | 2014-06-23 | 2014-06-23 | COB light source drive circuit and drive integrated type COB light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104023452A true CN104023452A (en) | 2014-09-03 |
Family
ID=51439961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410283329.3A Pending CN104023452A (en) | 2014-06-23 | 2014-06-23 | COB light source drive circuit and drive integrated type COB light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104023452A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918363A (en) * | 2015-05-14 | 2015-09-16 | 西安和合光电科技有限公司 | LED constant current drive power supply and production method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013094700A1 (en) * | 2011-12-20 | 2013-06-27 | シチズンホールディングス株式会社 | Led module |
| CN103196049A (en) * | 2013-03-06 | 2013-07-10 | 深圳市晶台光电有限公司 | LED (light-emitting diode) lamp panel adopting integrated COB (chip on board) packaging technology |
| CN103337582A (en) * | 2013-06-19 | 2013-10-02 | 深圳市源磊科技有限公司 | LED light source and manufacture method thereof |
| WO2014017005A1 (en) * | 2012-07-25 | 2014-01-30 | パナソニック株式会社 | Light emission module |
| CN203466213U (en) * | 2013-07-17 | 2014-03-05 | 中山市万普电子科技有限公司 | Led packaging structure and lamp |
| CN203608409U (en) * | 2012-10-10 | 2014-05-21 | 西铁城电子株式会社 | Led drive circuit |
| CN204090209U (en) * | 2014-06-23 | 2015-01-07 | 深圳市聚人成电子材料有限公司 | COB light source drive circuit and driving integrated form COB light source |
-
2014
- 2014-06-23 CN CN201410283329.3A patent/CN104023452A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013094700A1 (en) * | 2011-12-20 | 2013-06-27 | シチズンホールディングス株式会社 | Led module |
| WO2014017005A1 (en) * | 2012-07-25 | 2014-01-30 | パナソニック株式会社 | Light emission module |
| CN203608409U (en) * | 2012-10-10 | 2014-05-21 | 西铁城电子株式会社 | Led drive circuit |
| CN103196049A (en) * | 2013-03-06 | 2013-07-10 | 深圳市晶台光电有限公司 | LED (light-emitting diode) lamp panel adopting integrated COB (chip on board) packaging technology |
| CN103337582A (en) * | 2013-06-19 | 2013-10-02 | 深圳市源磊科技有限公司 | LED light source and manufacture method thereof |
| CN203466213U (en) * | 2013-07-17 | 2014-03-05 | 中山市万普电子科技有限公司 | Led packaging structure and lamp |
| CN204090209U (en) * | 2014-06-23 | 2015-01-07 | 深圳市聚人成电子材料有限公司 | COB light source drive circuit and driving integrated form COB light source |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104918363A (en) * | 2015-05-14 | 2015-09-16 | 西安和合光电科技有限公司 | LED constant current drive power supply and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203641919U (en) | Integrated LED (light-emitting diode) illumination module | |
| US20140268737A1 (en) | Direct view optical arrangement | |
| CN102954366A (en) | Light engine with led switching array | |
| CN104421682B (en) | LED light source module and the LEDbulb lamp comprising the module | |
| CN104976547B (en) | Light emitting diode assembly and light emitting diode bulb using same | |
| CN102244185A (en) | White light LED (light emitting diode) with high color rendering index, high light efficiency and low color temperature and preparation method thereof | |
| WO2012139306A1 (en) | Led bulb with high light-emitting efficiency | |
| CN104282676A (en) | Integrated LED lamp panel packaging structure and technology | |
| CN103672459B (en) | The light emitting diode illuminating apparatus of offer directional beam with cramped construction | |
| CN205480223U (en) | High stable pottery COB encapsulation LED lamp | |
| CN205177876U (en) | AC flexible LED filament that gives off light | |
| CN103196049A (en) | LED (light-emitting diode) lamp panel adopting integrated COB (chip on board) packaging technology | |
| CN202564438U (en) | LED packaging structure | |
| CN105810794A (en) | LED packaging structure | |
| CN204090209U (en) | COB light source drive circuit and driving integrated form COB light source | |
| CN104023452A (en) | COB light source drive circuit and drive integrated type COB light source | |
| CN203223777U (en) | Illuminating device | |
| CN105609496A (en) | High power density COB (Chip On Board) packaged white LED (Light Emitting Diode) module and packaging method thereof | |
| CN104747957A (en) | High-power LED (light-emitting diode) lamp | |
| CN103887299A (en) | High-voltage LED light source | |
| CN203339225U (en) | Non-encapsulation chip LED lighting illumination structure | |
| CN203413588U (en) | LED (Light Emitting Diode) light source board assembly, LED lamp wick and LED lighting device | |
| CN202196811U (en) | LED encapsulation baseplate | |
| CN202473920U (en) | Integrated packaging structure for high-voltage LED (light-emitting diode) chip and driving power supply chip | |
| CN203298235U (en) | Integrated led |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140903 |
|
| RJ01 | Rejection of invention patent application after publication |