CN201407567Y

CN201407567Y - Led ceiling lamp

Info

Publication number: CN201407567Y
Application number: CN2009200438716U
Authority: CN
Inventors: 李先栗; 李博
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-26
Filing date: 2009-05-26
Publication date: 2010-02-17
Anticipated expiration: 2019-05-26

Abstract

A LED ceiling lamp is composed of light source LEDs, a drive circuit and a casing; the light source is composed of 8-80 small power LEDs with power less than or equal to 0.1W, wherein the drive circuit is a full-wave rectification filter circuit with a current limiting capacitor, by adopting the design, the cost of LEDs and the drive circuit of the LEDs are reduced to the lowest and the lighting effect of the integral LED ceiling lamp is improved to the maximum. Compared with like products in prior art, the LED ceiling lamp has the advantages of low cost and high lighting effect, can be used for lighting in bedrooms, washing rooms, stairways, corridors, balconies and kitchens, and has very remarkable energy saving effect.

Description

The LED lamp affixed to the ceiling

Technical field

The utility model relates to a kind of lighting, the LED lamp affixed to the ceiling that especially a kind of power is 0.5W to 4W.

Technical background

Semiconductor light-emitting-diode is called for short LED, be enter 21st century since flourish a kind of new light sources, its outstanding behaviours is that the white light LEDs that can be used for throwing light on has been obtained breakthrough, has started tide again of light source revolution.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 high light efficiency of whole lamp up to 90Lm/W, 100,000 to 200,000 hours extra long life, desirable dimming behavior, the switch life of overlength, good mechanically stable degree or the like, be other all light source untouchabilities as light source! Moreover, low-power LED avoided fully big or middle power LED remain at present heat dissipation problem and the high defective of price, through well-designed, the cost and the price of whole lamp also can be lower, can take like a shot for users.This low wattage LED lighting is used for room lightings such as bedroom, corridor, corridor, balcony, television room, toilet, storeroom and really is the highest selection of cost performance.What be worth especially that De pays close attention to is, substituting after corresponding power saving fluorescent lamp with it can be further energy-conservation 50% to 70%, and reality is the most energy-conservation electricity-saving lamp!

Raising along with people's living standard, the illuminating lamp that above-mentioned bedroom, corridor, corridor, balcony, toilet, storeroom etc. are located uses better appearance more and more and the lamp affixed to the ceiling of decorative effect is arranged, yet the LED lamp affixed to the ceiling that with LED is light source almost be can not see on market, be number several pieces of patents seldom though can find, but all be based on the employing great power LED, thereby need consider heat abstractor and structure is special (as following patent: 200720153130.4; 200720199347.9; 200810121832.3; 200820094486.X), these designs make the cost of LED lamp affixed to the ceiling higher and light efficiency is lower, cost an arm and a leg on the one hand, and its energy-saving effect is had a greatly reduced quality on the other hand, so cost performance is not high, fails so far really to come into the market.

Summary of the invention

The purpose of this utility model be exactly to overcome that the light efficiency that exists in the product design of existing LED lamp affixed to the ceiling is not high, cost and price be more expensive, thereby the not high and shortcoming that is difficult to extensive use of cost performance, make that a kind of light efficiency height, life-span are long, little power consumption and the more cheap very high LED lamp affixed to the ceiling of cost performance of price.

Above-mentioned purpose of the present utility model is achieved by the following scheme: 1. the low-power LED series connection/series and parallel that adopts 8 to 80 power to be not more than 0.1W as the LED of light source is formed by connecting, and the quantity of specifically using LED is difference and different according to demand.So the major advantage of design is the heat dissipation problem that need not to consider LED, and luminous point is many, makes the diffuser of lamp affixed to the ceiling luminous evenly easily.In addition, this low-power LED operating current is very little, can design the led drive circuit that efficient is high, oneself power consumption is few, makes the whole light efficiency of lamp affixed to the ceiling very high, and energy-saving effect is fabulous; 2. design and a kind ofly realize the full-wave rectification of current limliting, the drive circuit that filter circuit is used as LED with series capacitor, full-wave rectifying circuit wherein is the bridge rectifier that four diodes are formed, and electrolytic capacitor is as filter capacitor.For driving above-mentioned low-power LED, the oneself power consumption of this kind drive circuit only is 20 milliwatts-40 milliwatt, 2 watts of LED lamp affixed to the ceilings by 36 low-power LED tandem workings for example, the efficient of described drive circuit almost are the limit that high efficiency drives up to 99%.And the efficient of the high-power LED drive circuit in the existing similar products design only is 60%-80%, untouchability! In addition, the cost of this drive circuit is very low, only is 1/tens of high-power LED drive circuit cost, also effectively reduces the cost of lamp affixed to the ceiling.Also to emphatically point out, an important feature of this drive circuit is not connect series resistance, because of series resistance not only has power consumption, the repeated stock of the big surge current that must produce when more seriously film resistor is unable to undergo switch, the life-span that can significantly reduce drive circuit.But still need the resistance of high resistance in parallel at the two ends of capacitor, the additional power consumption of its generation is very little, but can help improving security and reliability at the electric charge on effective vent discharge container behind the power cutoff; 3. because above-mentioned 2 points, this kind LED lamp affixed to the ceiling need not to design the heat abstractor of LED and drive circuit thereof, so structure is extremely simple, and its shell can adopt and the similar shell of existing lamp affixed to the ceiling, even certain existing lamp affixed to the ceiling shell, cost is effectively reduced.4. for the LED lamp affixed to the ceiling below the 2W, the quantity of the low-power LED that adopts generally is less than 40, this moment, LED can all be connected in series, and the capacity of the series capacitor of drive circuit should be according to what of LED quantity, in 0.22 microfarad---selection 0.47 microfarad scope in; For 2 watts to 4 watts product, the quantity of low-power LED often is 35 to 80, and can be divided into two groups equally this moment with it, and the LED of each group is connected in series, and is connected in parallel between two groups.The capacity of the series capacitor of drive circuit is in 0.47 microfarad---selects in the 1 microfarad scope.

The utility model is owing to adopted such scheme, cost performance increases substantially, therefore can be widely used in toilet, corridor, corridor, balcony, storeroom and even bedroom in the room lighting, when it substitutes the power saving fluorescent lamp of original use, but using electricity wisely 50%-70%, and have the life-span extremely long, even light efficiency is very high, be not afraid of frequent switch also is to reach high-high brightness or the like immediately to give prominence to advantage once turning on light in winter, is all low wattage lighting source untouchabilities.Moreover, its price also with use electronic energy-saving fluorescent close as the lamp affixed to the ceiling of light source, thereby can extensive use, obtain outstanding energy-saving effect.

Description of drawings

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

Fig. 1 is the circuit theory diagrams of embodiment 1 " 2 watts of LED lamp affixed to the ceilings ".

Fig. 2 is the front view of the structural representation of embodiment 1 " 2 watts of LED lamp affixed to the ceilings ".

Fig. 3 is the vertical view of the structural representation of embodiment 1 " 2 watts of LED lamp affixed to the ceilings ".In order to find out that LED and drive circuit thereof are installed in the situation on the chassis, have left and have analysed and observe window on diffuser.

Fig. 4 is the circuit theory diagrams of embodiment 2 " 4 watts of LED lamp affixed to the ceilings ".

Among the figure: 1 is the limiting capacitor that is connected in series; 2 is commutation diode; 3 is electrolytic capacitor; 4 is low-power LED; 5,6 be bleeder resistance; 7 is the diffuser of lamp affixed to the ceiling shell; 8 is the chassis of lamp affixed to the ceiling shell; 9 is the connector of the fixedly diffuser on the lamp affixed to the ceiling shell chassis; 10 is led drive circuit.

The specific embodiment

Embodiment 1 of the present utility model is " 2 watts of LED lamp affixed to the ceilings ", and Fig. 1 is its drive circuit schematic diagram.Wherein the capacity of Chuan Lian limiting capacitor (1) is 0.47 microfarad, and withstand voltage is not less than 600V; Commutation diode (2) rated current 1A, withstand voltage is not less than 600V; The capacity of the electrolytic capacitor of filtering (3) is 20 microfarads, the withstand voltage 150V that is not less than.The resistance of the bleeder resistance (5) in parallel with capacitor (1) is 10M Ω; The resistance of the bleeder resistance (6) that electrolytic capacitor (3) is in parallel is 1M Ω.What value De illustrated is that this drive circuit does not connect series resistance, has effectively guaranteed the long-life and the high efficiency of drive circuit; Electrolytic capacitor (3) is in parallel with whole LED coupled in series (4), has effectively eliminated when opening power supply surge current to the adverse effect of LED, makes the LED can extra long life work.Present embodiment 1 has used the low-power LED of 36 rated current as 20mA, and it all is connected in series.

Fig. 2, Fig. 3 are the structural representation of embodiment 1 " 2 watts of LED lamp affixed to the ceilings ", and its shell mechanism and conventional products are similar, have diffuser (7) and chassis (8), with the fixing connection therebetween of connector (9), are similar to routine, repeat no more.36 LED are connected in series, and are hexagon and install and be fixed on the chassis; Led drive circuit (10) is installed near the center on chassis.

Embodiment 2 is " 4 watts of LED lamp affixed to the ceilings ", and Fig. 3 is circuit theory diagrams.Present embodiment 2 has used the low-power LED of 80 rated current as 20mA, is divided into two groups 40 by one group, is connected in parallel between two groups.The capacity of the limiting capacitor of its series connection (1) is 1 microfarad, and withstand voltage is not less than 600V; The capacity of the electrolytic capacitor of filtering (3) is 50 microfarads, the withstand voltage 150V that is not less than.The remainder of circuit and shell mechanism are all similar to Example 1, need not to repeat.

Claims

1. LED lamp affixed to the ceiling, its power is 0.5W to 4.0W, constituted by light source led, drive circuit and shell, shell wherein is similar with existing lamp affixed to the ceiling shell, be made up of lamp affixed to the ceiling chassis and transparent lamp shade, the light source led that is characterized as wherein of this LED lamp affixed to the ceiling is made up of the low-power LED series connection/series and parallel that 8 to 80 power are not more than 0.1W; Drive circuit wherein is be connected in series full-wave rectification, the filter circuit of limiting capacitor; Full-wave rectifying circuit wherein is the full-bridge circuit that diode is formed; Filter circuit wherein is made of electrolytic capacitor.

2. a kind of LED lamp affixed to the ceiling as claimed in claim 1, the light source led that it is characterized by wherein is in series by 8 low-power LEDs that are not more than 0.1W to 40 power; Drive circuit wherein is be connected in series full-wave rectification, the filter circuit of limiting capacitor, and the capacity of limiting capacitor wherein is 0.22 microfarad to 0.56 microfarad; Wherein the capacity of the electrolytic capacitor of filtering is 10 microfarad to 100 microfarads.

3. a kind of LED lamp affixed to the ceiling as claimed in claim 1, the light source led that it is characterized by wherein is made up of 40 low-power LEDs that are not more than 0.1W to 80 power, and whole LED are divided into two groups that quantity equates, the LED of each group all is connected in series, and then two groups of LED are connected in parallel; Drive circuit wherein is be connected in series full-wave rectification, the filter circuit of limiting capacitor, and the capacity of limiting capacitor wherein is 0.47 microfarad to 1.00 microfarad; Wherein the capacity of the electrolytic capacitor of filtering is 20 microfarad to 100 microfarads.