CN201487664U

CN201487664U - LED bulb

Info

Publication number: CN201487664U
Application number: CN2009201942654U
Authority: CN
Inventors: 陈炳武
Original assignee: 陈炳武
Priority date: 2009-09-08
Filing date: 2009-09-08
Publication date: 2010-05-26
Anticipated expiration: 2019-09-08

Abstract

The utility model belongs to the field of lighting technology and particularly relates to an LED bulb. In the LED bulb, a lamp holder, a plastic shell and a transparent lampshade form the external form of the bulb, a power supply module, a circuit board and an LED element are arranged in the external form. The LED bulb is characterized in that: the circuit board is a double-sided copper foil circuit board; the anode and cathode pins of an LED are arranged on two sides of the circuit board through paste welding; a plurality of circuit board components are radially arranged along the radius direction of the lampshade; the bottom of the lampshade is provided with a plurality of air vents; and the side of the lampshade is provided with a plurality of air slots. The double-sided copper foil circuit board doubles the area of the radiating copper foil; the anode and cathode pins are extended and welded on the copper foil, so that the heat led-out performance of the chip is improved; and the arrangement of the air vents promotes the exchange of the air inside and outside a lamp. Due to the technical measures, the LED bulb of the utility model has higher radiation performance than the LED bulb in the prior art, and the effective service life of the bulb is prolonged.

Description

A kind of LED bulb

Technical field:

The utility model belongs to lighting technical field, specifically belongs to technical field of semiconductor illumination.

Background technology:

The semiconductor LED lighting engineering is acknowledged as lighting engineering of new generation, be in the fast development at present, semiconductor light-emitting-diode is that LED is used for illumination, on each technological layer, be still waiting further to improve perfect, luminous efficiency such as it is still waiting to improve, and cost remains to be declined to a great extent, and the radiating treatment when it makes light fixture must be improved solution, can delay light decay speed, reach the due long-life.The encapsulation pattern of LED mainly contains patterns such as direct insertion small-power encapsulation of two pin and the above high-power encapsulation of 1W level at present, uses the LED of different encapsulation patterns, and its fitting structure can be very different, and depends primarily on and encapsulate the radiator structure design that pattern adapts.For the low-power LED of the direct insertion encapsulation of two pin, mainly contain following several structure with its LED bulb of making at present, a kind of is to reach tens slotting being welded on the circuit board of LED, is encapsulated as a bulb with a glass Lamp cup or plastics cell-shell again; Another kind is that LED directly is inserted on the plastic bottom board, the both positive and negative polarity pin is coupled together again, and is encapsulated in a sphere or the columniform transparent cell-shell.The LED bulb thermal conductance of these structures goes out performance and heat dispersion is very poor, causes the junction temperature of led chip higher, causes light decay speed very fast, and the light fixture useful working life shortens dramatically.

Goal of the invention:

The purpose of this utility model is exactly to provide a kind of LED of improvement bulb thermal conductance to go out the scheme of performance and heat dispersion, reaches and delays the purpose that LED light decay speed improves its useful working life.

Summary of the invention:

LED bulb of the present utility model comprises lamp holder, plastic casing, transparent lamp shade, power module and LED element, it is characterized in that: also comprise some two-sided copper foil circuit boards, the both positive and negative polarity pin of several LED elements pastes the two sides that is welded in circuit board respectively, each bar circuit board assemblies is radial arrangement along the lampshade radial direction, has lead to connect between each bar circuit board.Transparent lamp shade is a drum, and perhaps its lateral column face is like gear shape, and the number of teeth is counted unanimity with the bar of circuit board, and there are some passages the lampshade bottom surface, and some air channels have been circular layout above its side.

Technique effect:

By the said structure feature as can be known, because adopted two-sided copper foil circuit board, the both positive and negative polarity pin of LED pastes respectively on the Copper Foil that is welded in the two sides, the weld length of both positive and negative polarity pin can surpass more than 1 centimetre, the thermal conductance that has improved led chip greatly goes out performance, increased the surface area of Copper Foil exponentially, promptly improved heat dispersion, the bottom surface of adding lampshade is provided with passage, the side is provided with air channel, helps the exchange of bulb inner air and outer air, has accelerated overflowing of the interior hot-air of lamp, further improved the heat dispersion of bulb, more than each technical measures can effectively improve the working life of bulb.

Description of drawings:

Fig. 1 is the structural representation of the utility model LED bulb;

Fig. 2 is the AA view profile of Fig. 1;

Fig. 3 is the profile schematic diagram after transparent lamp shade changes;

Fig. 4 is the BB view profile of Fig. 3.

The specific embodiment:

Referring to Fig. 1, Fig. 2, the utility model LED bulb is by lamp holder 1, plastic casing 2, transparent lamp shade 3 constitutes the bulb profile, be placed with power module (not drawing among the figure) in the plastic casing 2, be radial arrangement along radial direction in the transparent lamp shade 3 some two-sided copper foil circuit boards 4 are arranged, there is shown 12, every circuit board all is welded with some quantity (shown in the figure 8) LED element 5, the both positive and negative polarity pin pastes respectively on the two sides Copper Foil that is welded in circuit board, be connected with power module again after connecting with lead between each bar circuit board, the input line of power module is connected with two tie points of lamp holder, and the complete circuit that has promptly constituted this LED bulb connects.Transparent lamp shade 3 is a drum, and there are some passages 6 its bottom surface, and some air channels 7 have been circular layout above its side.Hot-air flows out from the air channel on top, and the cold air in the environment enters from the bottom passage, and the heat on each circuit board surface is constantly taken away in so air-flow exchange, and the temperature of led chip is controlled under a certain equilibrium temperature.

Referring to Fig. 3, Fig. 4, this programme has just improved the lateral column face shape of transparent lamp shade 3 on the basis of Fig. 1, Fig. 2 scheme, change into approximate gear shape by the cylindrical shape of cylinder, the number of teeth is counted unanimity with the bar of circuit board, its bottom surface still has some passages 6, top, side still is circular layout and deposits some air channels 7, and circuit such as diagram lamp holder 1, plastic casing 2, two-sided copper foil circuit board 4, LED element 5 and structure and Fig. 1, structure shown in Figure 2 are identical.

Claims

1. LED bulb, comprise lamp holder (1), plastic casing (2), transparent lamp shade (3), it is characterized in that: also comprise some two-sided copper foil circuit boards (4), the both positive and negative polarity pin of several LED elements (5) pastes the two sides that is welded in circuit board respectively, each bar circuit board assemblies is radial arrangement along the lampshade radial direction, has lead to connect between each bar circuit board.

2. LED bulb according to claim 1 is characterized in that: described transparent lamp shade (3) is a drum, and there are some passages (6) its bottom surface, and some air channels (7) have been circular layout above its side.

3. LED bulb according to claim 1 is characterized in that: the lateral column face of described transparent lamp shade (3) is like gear shape, and the number of teeth is counted unanimity with the bar of circuit board, and there are some passages (6) its bottom surface, and some air channels (7) have been circular layout above its side.