CN201555042U

CN201555042U - Chip small-power LED bulb

Info

Publication number: CN201555042U
Application number: CN2009200486419U
Authority: CN
Inventors: 李先栗; 李博
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-10-26
Filing date: 2009-10-26
Publication date: 2010-08-18
Anticipated expiration: 2019-10-26

Abstract

The utility model relates to a chip small-power LED bulb, which consists of a light source LED, a driving circuit, a glass eye and a lamp cap and is characterized in that a light source is formed by connecting chip small-power LEDs with the power being less than 0.1W in series and is pasted on printing circuit of a round aluminum base plate or a copper base plate or an epoxy resin plate or a paper rubber plate; and the LED driving circuit is provided with a full-wave rectification and filter circuit of a current-limiting capacitor. Compared with the similar product, the chip small-power LED bulb has the obvious advantages of high illuminating efficiency, bigger output luminous flux, lower cost, wider illuminating range and the like, can be used for indoor down lamps and the illuminating lights in the passageway, the corridor, the kitchen, the washroom, the small bedroom and the like and has very obvious energy-saving effect.

Description

SMD small power LED lamp

Technical field

The utility model relates to a kind of lighting bulb, especially a kind of small power LED lamp that adopts SMD low-power LED to be connected in series.

Background technology

Semiconductor light-emitting-diode is called for short LED, be enter 21st century since flourish a kind of new light sources, at present, white light LEDs is being used for having demonstrated impayable superiority and high performance-price ratio aspect the low wattage illumination.The low-power lighting below 2 watts for example, adopt low-power LED can obtain the whole lamp extra-high photo effect up to 120Lm/W, the extra long life more than 50,000 hours, desirable dimming behavior, anti-frequent switch, splendid firmness and reliability and do not have outstanding advantage such as mercury pollution, be other all light source untouchabilities as light source! Moreover, low-power LED avoided big or middle power LED still be difficult at present fine solution heat dissipation problem and problem on the high side, the cost and the price of whole lamp also can be lower, can be taken like a shot by users.This small power LED lamp, still seem that illumination is not enough though be used for the demand of floodlighting, but the small desk lamp that is used for cubicle, toilet, kitchen, corridor, corridor, balcony, television room, storeroom/cabinet or the like and closely illumination then is the highest selection of cost performance, and market is very wide!

The illuminating LED bulb adopts the great power LED of 1W, 3W to combine more at present, and whole light is imitated on the low side, and cost is higher; (for example the patent No. is patents such as CN200810030028.4 and CN200820079346.5) is so that fail to promote in enormous quantities; The LED bulb that the low-power LED of many transparent " acrylic " encapsulation of the employing of up-to-date appearance is formed, owing to the relatively large number that is unfavorable for increasing LED of this encapsulated LED volume, therefore power is less, and the luminous flux of output is not high enough and limited the scope of application (for example number of patent application is 200920235555.7; 200920235560.X etc. patent).

Summary of the invention

The utility model is exactly to overcome the shortcoming that the light efficiency that above-mentioned existing LED bulb product exists is on the low side, cost is higher or luminous flux is less than normal and be unfavorable for applying, design with produce a kind of light efficiency height, the life-span is long, volume is little, luminous flux is higher New LED low-power bulb.Above-mentioned purpose of the present utility model is achieved by the following scheme: adopt the SMD low-power LED of power less than 0.1W 1..Because low-power LED is resolved heat dissipation problem easily, so luminous efficiency is high in its practicality, energy-saving effect is best; Its SMD encapsulating structure makes the volume minimum, on printed circuit board (PCB) of the same area, more LED can be installed, therefore can effectively strengthen the power of LED bulb and the luminous flux of output, enlarged range of application, and allow and adopt surface mount process and make easy for installationly, can cut down finished cost to greatest extent; 2. all LED are connected in series, and make the required electric current of driving LED reduce to minimum and make the cost of drive circuit reduce to minimum.Can choose 4 to 60 adopting surface mounted LED tandem workings respectively according to the requirement of different luminous fluxes; 3. adopt full-wave rectification, the filter circuit of the limiting capacitor that is connected in series to be used as led drive circuit, can make drive circuit the simplest the most reliable again, cost is minimum, volume is minimum, the oneself power consumption of circuit also can drop to minimum and obtain the highest system's light efficiency.For making the drive circuit overlong service life, it is to have zero series resistance that this drive circuit also has a unique distinction, the resistance of any resistance that promptly is not connected in series.The surge current of conventional similar circuit in order to reduce to start shooting all is connected with series resistance at the forward and backward two ends of this circuit, yet series resistance not only can produce additional power consumption, the repeated stock of the big surge current that must produce when more seriously film resistor is unable to undergo switch, and the life-span of significantly reducing drive circuit.The measure that led drive circuit of the present utility model is thoroughly eliminated issuable surge current when turning on light is to stipulate the capacity of the filter condenser of this drive circuit 30 times to 1000 times for the limiting capacitor capacity of series connection, the surge current when falling to turn on light with the capacity next " eating " of enough big filter condenser; 4. adopt circular printed circuit board (PCB) to mount adopting surface mounted LED, realize that whole LED are connected in series.Circular circuit board helps putting into the glass bubble, because the opening of glass bubble is round; In addition, circular configuration is also comparatively attractive in appearance.Require lower product for luminous flux, for example only need to use 4 to 12 paster LEDs, because of LED heating total amount is very little, it is mounted on the printed circuit of epoxy resin plate or paper offset plate just passable, the diameter of circular printed circuit board can be chosen between 10mm to 23mm; When needing with 12 to 60 paster LEDs when requiring luminous flux to improve, because LED heating total amount increases, and it need be mounted on circular aluminium base, or on the printed circuit of copper base, according to the quantity difference of LED, the diameter of circular circuit board can be chosen in 15mm to 45mm scope.Wherein a fairly large number of heating total amount of the LED of Cai Yonging is more relatively, and the back side of circular aluminium base or copper base printed circuit need add metal heat sink; Wherein adopt LED less, the back side of circular aluminium base or copper base printed circuit need not to add radiator.Described radiator can be cylindrical shape, or cylindrical, or radiation shape, or barrier shape; 5. because the volume of drive circuit is very little, can directly be placed in adopted incandescent lamp standard lamp head (for example E27, E27/51 * 39, E26, E14 and B22 type lamp holder) in.The glass bubble of lamp also adopts and the same or analogous cell-shell of incandescent lamp, makes the profile of lamp and the incandescent lamp bulb striking resemblances that people get used to using! For the diameter that adopts the less and corresponding circular circuit board of paster LED is 10mm's to 23mm, the neck of its glass bubble is allowed less and can be directly bonding with lamp holder, and the neck of glass bubble can stretch into 8 to 20 millimeters in lamp holder, thereby effectively increases the bonding firmness of glass bubble and lamp holder; For wherein adopting greatly 25mm to 45mm of the paster LED more and increasing diameter that makes circular circuit board, can adopt the bigger glass bubble of opening, 2 kinds of organization plans supporting with it are arranged: a kind of organization plan is that printed circuit board (PCB), metal heat sink, led drive circuit and the thermal insulation board that will mount LED are installed on the glass stem, the input line of led drive circuit is connected with the lead of glass stem, then with the loudspeaker limit of glass stem and mouthful sealing-in of glass bubble, again with sealing-in the glass bubble of stem stem directly bonding with lamp holder; Second kind of organization plan is that lamp holder is connected with an adapter of plastic, the internal diameter of the other end of adapter of plastic is corresponding with the external diameter of glass bubble opening part, the printed circuit board (PCB), metal heat sink and the led drive circuit that have mounted LED all are installed in lamp holder and the adapter of plastic, and it is interior and bonding with adapter of plastic that glass bubble mouth stretches into adapter of plastic.

Consider multiple illuminating effect, the glow color of used LED can be a white light and be used for general lighting, also can be red, green, blue, yellow, orange, purple or the like colored and be used for special lighting such as decoration; Consider different demands, the glass bubble can adopt glass bubble transparent, frosted or that whitewash.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the circuit theory diagrams of the SMD small power LED lamp of the utility model.Wherein the part of dotted line is a led drive circuit;

Fig. 2 is embodiment 1 " a kind of SMD small power LED lamp that does not add a radiator " contour structures schematic diagram; Fig. 3 is its internal structure schematic diagram.

Fig. 4 is the internal structure schematic diagram of embodiment 2 " a kind of SMD small power LED lamp with radiator ";

Fig. 5 is the internal structure schematic diagram of embodiment 3 " a kind of SMD small power LED lamp with glass stem ";

Fig. 6 is the contour structures schematic diagram of embodiment 4 " a kind of SMD small power LED lamp with adapter of plastic "; Fig. 7 is its internal structure schematic diagram.

1. lamp holders among the figure; 2. glass bulb; 3. SMD low-power LED; 4. mount the circular printed circuit board of LED; 5.LED drive circuit; 6. glass bulb neck; 7. the bonded adhesives between lamp holder and the glass bulb neck; 8. metal heat sink; 9. thermal insulation board; 10. glass stem; 11.LED drive circuit input line; 12. the glass rod on the stem stem.

The specific embodiment

Embodiment 1 of the present utility model is 10 LED bulbs that rated current is the SMD small-power white light LEDs of 20mA of a kind of employing.Specified input voltage is 220V, 50Hz, and the bulb input power is 0.5W; 10 adopting surface mounted LEDs are mounted on the circular paper offset printing circuit that diameter is 20mm, and all LED is connected in series; Led drive circuit is be connected in series full-wave rectification, the filter circuit of limiting capacitor, and the resistance of any resistance that is not connected in series in the circuit.As shown in Figure 1, the capacity of the limiting capacitor that wherein is connected in series is 0.33 microfarad, and the capacity of the electrolytic capacitor of filtering is 20 microfarads, and the latter is the former 60 times; Glass bubble is the hyaloplasmic sphere bubble of diameter 45mm, and the glass bubble is directly bonding with the E27 standard lamp head, and the neck of glass bubble stretches into 8 to 20 millimeters in lamp holder, comes bonding with the epoxy resin that is added with filler as bonded adhesives between glass bubble neck and the lamp holder.Fig. 2 is its contour structures schematic diagram, and Fig. 3 is its internal structure schematic diagram.

Embodiment 2 is 18 LED bulbs that rated current is the SMD small-power white light LEDs of 20mA of a kind of employing, and input power is 1.0W; 18 SMD white light LEDs are mounted on the circular aluminium base printed circuit that diameter is 20.5mm, and all LED is connected in series, and at the back side of aluminium base columnar metal heat sink is installed, and Fig. 4 is its internal structure schematic diagram.Other are identical with embodiment 1.

Embodiment 3 is 28 LED bulbs that rated current is the SMD small-power white light LEDs of 20mA of a kind of employing, and input power is 1.5W; 28 LED are mounted on the circular aluminium base printed circuit that diameter is 30mm, all LED is connected in series, at the back side of aluminium base the cylindrical metal radiator is installed, led drive circuit is installed in the radiator, with the radiator 10mm of being separated by thermal insulation board is installed, and the described circular printed circuit board that mounts LED, metal heat sink, led drive circuit and thermal insulation board all have centre bore and be sleeved on the glass rod of glass stem, and be firm with adhering with epoxy resin; Glass bubble is the pyriform glass bubble of diameter 55mm, the loudspeaker limit of glass stem and mouthful sealing-in of glass bubble, sealing-in the glass bubble and the lamp holder of stem stem directly bonding, other are identical with embodiment 1, schematic diagram such as Fig. 5.

Embodiment 4 is 38 LED bulbs that rated current is the SMD small-power white light LEDs of 20mA of a kind of employing, and input power is 2.0W; 38 SMD white light LEDs are mounted on the circular aluminium base printed circuit that diameter is 33mm, and all LED is connected in series, and at the back side of aluminium base the cylindrical metal radiator is installed; The glass bubble is the pyriform cell-shell of diameter 60mm, and the external diameter of its opening part is 35mm; The E27 lamp holder is connected with the osculum end of adapter of plastic, and the circular circuit board, metal heat sink, the led drive circuit that have mounted LED all are installed in lamp holder and the adapter of plastic; Glass steeps a mouthful big opening end that stretches into adapter of plastic and bonding with adapter of plastic, and other are identical with embodiment 1.Fig. 6, Fig. 7 are respectively its contour structures schematic diagram and internal structure schematic diagram.

Claims

1. SMD small power LED lamp, constitute by light source led, led drive circuit, glass bubble and lamp holder, it is characterized in that wherein light source is connected in series less than the SMD low-power LED of 0.1W by power forms and is mounted on circular aluminium base, or copper base, or the epoxy resin plate, or on the printed circuit of paper offset plate; Led drive circuit wherein is be connected in series full-wave rectification, the filter circuit of limiting capacitor.

2. a kind of SMD small power LED lamp as claimed in claim 1 is characterized by the full-wave rectification by the limiting capacitor that is connected in series wherein, the led drive circuit that filter circuit constituted has zero series resistance; The capacity of its filter condenser is 30 times to 1000 times of limiting capacitor capacity of series connection.

3. a kind of SMD small power LED lamp as claimed in claim 1 is characterized by wherein LED and is 4 to 12 power and is connected in series less than the SMD low-power LED of 0.1W and forms and be mounted on the printed circuit of circular epoxy resin plate that diameter is 10mm to 23mm or paper offset plate; Led drive circuit wherein is installed in the lamp holder; Glass bubble wherein is directly bonding with lamp holder, and the neck of glass bubble stretches into 8 to 20 millimeters in lamp holder.

4. a kind of SMD small power LED lamp as claimed in claim 1, it is characterized by wherein LED and be 12 to 20 power is connected in series less than the SMD low-power LED of 0.1W and forms and be mounted on the printed circuit of circular aluminium base that diameter is 15mm to 23mm or copper base, the back side at aluminium base or copper base is equipped with metal heat sink, perhaps only with aluminium base or copper base as radiator; Led drive circuit wherein is installed in the lamp holder; Glass bubble wherein is directly bonding with lamp holder, and the neck of glass bubble stretches into 8 to 20 millimeters in lamp holder.

5. a kind of SMD small power LED lamp as claimed in claim 1, it is characterized by wherein LED and be 18 to 50 power is connected in series less than the SMD low-power LED of 0.1W and forms and be mounted on the printed circuit of circular aluminium base that diameter is 25mm to 35mm or copper base, the back side at aluminium base or copper base is equipped with metal heat sink, in the metal heat sink or near radiator led drive circuit is installed, with the drive circuit 5mm to 20mm of being separated by thermal insulation board is installed, the described circular printed circuit board that mounts LED, metal heat sink, led drive circuit and thermal insulation board are installed on the glass stem, mouthful sealing-in of the loudspeaker limit of glass stem and glass bubble, sealing-in the glass bubble of stem stem directly bonding with lamp holder.

6. a kind of SMD small power LED lamp as claimed in claim 1, it is characterized by wherein LED and be 20 to 60 power and be connected in series less than the SMD low-power LED of 0.1W and form and be mounted on the printed circuit of circular aluminium base that diameter is 25mm to 45mm or copper base, metal heat sink is installed at the back side of aluminium base or copper base; Be connected an adapter of plastic between wherein glass bubble and the lamp holder.