CN2766348Y

CN2766348Y - LED module made from multicoloured LED and bulb using the same

Info

Publication number: CN2766348Y
Application number: CNU2005200539795U
Authority: CN
Inventors: 张东方
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-18
Filing date: 2005-01-18
Publication date: 2006-03-22
Anticipated expiration: 2015-01-18

Abstract

The utility model relates to an LED lighting device. An LED module which has a small size and high arrangement density is provided, scores of LED wafers can be arranged in the module, and the lighting effect of the module can be enhanced; the LED wafers in the LED module can be connected in series, in parallel, or connected in series after the series connection, wherein in order to solve the problem of high cost of LEDs with certain colors, LED wafers with two kinds or multiple kinds of colors can be combined according to an appropriate number proportion, and the desired coloured light can be obtained; LED wafers with at least three kinds of colors of red, orange, yellow, green, cyan, blue and purple are combined according to an appropriate number proportion, and thus white lights which are approaching to natural lights can be emitted. In addition, the utility model also provides an LED lamp bulb which is made of the LED module, wherein on the basis of an ordinary lamp cap, a ceramic heat radiating device which has the advantages of good heat radiating property, insulating effect and low cost is additionally arranged on the ordinary lamp cap, the LED module is tightly contacted with the ceramic heat radiating device, and thus well heat radiation of the LED module can be realized.

Description

With multi-colored led led module of making and the bulb made with this module

Technical field

The utility model relates to illuminating device, more particularly, relates to led module that a kind of usefulness multi-colored led (light-emitting diode) makes and the bulb made from this module

Background technology

Traditional illuminating lamp has incandescent lamp, fluorescent lamp etc., and the work of these lamps is generally 110V or 220V, has characteristics such as power consumption is big, light is dazzling a bit, the life-span is not long.Because LED can work under lower voltage, and its power consumption is little, the life-span is long, so available a plurality of LED is combined into an illuminating lamp.

But, in the existing LED Assembled lamp, normally adopting diameter is bullet cut encapsulated LED about 5mm, its volume ratio LED wafer is much bigger, and (size of LED wafer is by being 12mil*12mil, suitable 0.3mm*0.3mm, its thickness is then littler), the LED number that can put in an Assembled lamp is more limited; In addition, the luminosity of LED is directly proportional with the electric current that flows through usually, and caloric value then can increase along with the increase of electric current, owing to be subjected to the restriction of radiating condition, the number of LED can not be too many, and electric current can not be excessive, otherwise the temperature during its work can cause LED to damage.

In addition, in order to adapt to the needs of human body naked eyes, the light that illuminating lamp sent is preferably white light.In the existing LED Assembled lamp, also have and adopt white light LEDs as luminescent device.For white light LEDs, the main commercialization practice is day inferior chemistry (Nichia) invention at present, wherein the InGaN blue light crystal grain with the 460nm wavelength is coated with last layer YAG fluorescent material, utilize blue-ray LED to shine this fluorescent material with the 555nm wavelength gold-tinted of generation with the blue light complementation, utilize lens principle that gold-tinted, the blue light of complementation are mixed again, just can draw the required white light of naked eyes.What another kind was that the SUMITOMO CHEMICAL electrician develops is the white light LEDs of material with ZnSe, but its luminous efficiency is relatively poor.And the price of above-mentioned two kinds of white light LEDs all compares expensive.And, because above-mentioned white light LEDs is all formed white light by two kinds of chromatic spectrums, for example form the required white light of naked eyes by blue light+sodium yellow.But this white light is not the white light of real meaning, because two kinds of light waves are wherein only arranged, does not comprise red, orange, yellow, green, blue or green, the blue and purple light wave in the natural daylight.Though do not see difference under the general case, when shining on the monochromatic material with above-mentioned two wavelength white lights, when for example shining on the red material, the color that naked eyes are seen will no longer be normal redness, and it is unusual to produce color.

The utility model content

At the above-mentioned defective of prior art, the utility model will solve problems such as existing LED bulb is limited owing to the LED number that produced by the radiating condition restriction, illumination effect is not ideal enough.

For solving the problems of the technologies described above, the utility model at first provides a kind of led module, comprises circuit board and is contained in a plurality of luminescent devices on the described circuit board; Wherein, described a plurality of luminescent devices are a plurality of LED wafers, are electrically connected mutually between them, and closely are arranged on the described circuit board; The LED wafer that comprises multiple color in described a plurality of LED wafer.

In the led module of the present utility model,, can make up in suitable number ratio, send the required coloured light that has with combination by the LED wafer of two or more colors for solving the LED wafer cost problem of higher of some color.In order to send the white light that approaches natural daylight, described each LED wafer preferably includes at least three kinds in red, orange, yellow, green, blue or green, blue and the purple LED wafer, in suitable number ratio combination, can send the white light that approaches natural daylight between the described versicolor LED wafer.In addition, can there be the surface to lay the printing opacity colloid that one deck is used for fixing and protects described each LED wafer at described circuit board; And the heat dissipation metal plate of being close to it in the installing of the back side of described circuit board.Wherein, can be between described a plurality of LED wafer by multiple mode parallel connection, series connection or and string mixing connection.

The utility model also provides a kind of usefulness LED bulb that above-mentioned led module is made, comprising lamp holder, radiating element and described led module; Described radiating element is loaded on the bottom of described lamp holder, and described led module then is close to the bottom that is installed on described radiating element; Lead through passing described radiating element between described lamp holder and the led module is electrically connected.

In the LED bulb of the present utility model, described lamp holder is preferably standard lamp head, and described radiating element is preferably the ceramic heat-dissipating device.Preferably also set up a transparent lamp shade, described lampshade is contained in the bottom of described radiating element, and described led module is covered on its inside.The profile of described lampshade can be identical with the ordinary incandescent lamp profile; Also can be spheroidal, oval sphere, cuboid or diamond; Also can coat non-light transmissive material, make the illumination effect of lampshade be numeral, letter or literal shape in the appropriate location of described lampshade.

From such scheme as can be seen, the led module that a kind of volume is small and exquisite, the density of arranging is higher is provided in the utility model, and provide a kind of usefulness bulb that this module is made, wherein on the basis of normal lamp holder, set up heat dispersion good, insulation effect and lower-cost ceramic heat-dissipating device arranged, and led module and this ceramic heat-dissipating device be close to, thereby can carry out good heat radiation to led module, therefore, dozens of LED wafer can be set, to strengthen its illumination effect in this led module.Can adopt the LED wafer of multiple color in this led module, because densely arranged between them, required coloured light arranged so can form any, thereby can overcome the LED wafer cost problem of higher of a certain color; The LED wafer of described multiple color one-tenth also capable of being combined approaches the white light of natural daylight, thereby it is higher to overcome existing white light LEDs wafer cost, and made white light LEDs Assembled lamp can produce the unusual problem of color when shining on the monochromatic material.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the schematic appearance of LED bulb among embodiment of the utility model;

Fig. 2 is the decomposing schematic representation of the bulb of LED shown in Fig. 1;

Fig. 3 is the center line cutaway view of the bulb of LED shown in Fig. 1;

Fig. 4 is the design sketch of looking up after the transparent lamp shade of the bulb of LED shown in Fig. 1 is removed;

Fig. 5 is the electrical connection schematic diagram between the LED among embodiment of the utility model;

Fig. 6 is the circuit connecting relation schematic diagram between the LED among another embodiment of the utility model;

Fig. 7 is the upward view of LED bulb among another embodiment of the utility model.

Embodiment

A preferred embodiment of the present utility model as shown in Figures 1 to 4, as can be seen from the figure, this is a LED bulb, comprising the standard lamp head 11 that is used to introduce power supply, the ceramic heat-dissipating device 12 that is connected with lamp holder and the transparent lamp shade 13 that is connected with the ceramic heat-dissipating device.Wherein, radiating element is connected with lamp holder by helicitic texture, and lampshade also is connected with radiating element by helicitic texture, certainly, also can connect by buckle structure between them.

As can be seen from Figure 2, the luminous element of this LED bulb is a led module 14, comprises heat radiation aluminium flake 141 and a circuit board 142 in this led module, and the bottom of the top of aluminium flake and ceramic heat-dissipating device is close to, the bottom then is close to circuit board, thereby can strengthen radiating effect.

As can be seen from Figure 4, on the circuit board 142 of led module 14, be provided with a plurality of LED 143, they all are small-sized LED wafers, and volume is little, and illumination effect is good.As shown in the figure can with circuit board that standard lamp head cooperates on, 20-40 LED wafer can be set.

As can be seen from Figure 3, the lead through passing radiating element 12 15 is realized being electrically connected between lamp holder 11 and the led module 14.

Embodiment of the utility model as shown in Figure 5, during concrete enforcement, a plurality of LED wafers in the led module are preferably taked following connected mode: one or more branch road is set, and parallel with one another on circuit between each many branch road, be connected to the common source line that is used to introduce working power; A plurality of lamp groups are arranged, series connection successively between each lamp group in each bar branch road; In each lamp group, be provided with two LED wafers, parallel with one another on circuit between these two LED wafers.In order to prevent these LED wafers of electrostatic damage, wherein going back reverse parallel connection has an antistatic diode D1, and this moment can only be with direct current as working power, if be working power with the alternating current, then needs to remove this branch road of antistatic diode D1.The LED wafer of one, three or other numbers can also only be set in each lamp group in addition.

The utility model has another embodiment as shown in Figure 6, the difference of it and Fig. 5 is, two LED in each lamp group are reverse parallel connections, when direct connection AC power, the positive half cycle of sinusoidal ac can make all LED of wherein forward connection luminous, the negative half period of alternating current can make all LED that wherein oppositely connect luminous, that is to say that the positive half cycle and the negative half period of sinusoidal ac all have the LED operate as normal.And, owing in each lamp group two LED reverse parallel connections are arranged all, when on the either direction static being arranged, the instantaneous high pressure of described static can be released by equidirectional each light-emitting diode with it, thereby can not damage light-emitting diode, that is to say, save the purpose that the antistatic diode D1 shown in Fig. 5 also can reach antistatic.

During concrete enforcement,, can make up to send the required coloured light that has in suitable number ratio by the LED wafer of other two or more colors in order to solve the LED wafer cost problem of higher of some color.For example, can be by red LED wafer and blue led wafer, number ratio combination in 1: 1, staggered between them, intensive being arranged on the circuit board is when the distance beyond 0.5 meter is observed, the light that they send is very near pink, after having adorned lampshade 13, will pure peach light when seeing from the outside, do not see that fully the LED of different colours wafer is arranged on the led module.

In the another kind of execution mode, in order to make this LED bulb can send white light near natural daylight, should adopt the LED wafer of multiple color as far as possible, for example comprise 2 of red LED wafers respectively, 2 of orange LED wafers, 5 of yellow led wafers, 7 of green LED wafers, 19 of blue led wafers, totally 35, and add in the blue led wafer surface and to be coated with yellow fluorescent material, staggered between them, and intensive being arranged on the circuit board, when the distance beyond 0.5 meter is observed, the light that they send very near the white light of natural daylight, after having adorned lampshade 13, does not see fully when seeing from the outside that the LED of different colours wafer is arranged on the led module.When impinging upon on the red material, can not produce the unusual situation of color with this white light.Because the cost of above-mentioned colored led wafer is lower than existing white light LEDs wafer, so also can reach cost-effective purpose.

As can be seen from Figure 5, excessive in order to prevent electric current, wherein also be serially connected with current-limiting resistance R1, certainly, can also adopt other current-limiting circuits; In addition, easily by the situation of electrostatic damage, wherein also and meet a general-purpose diode D1, for example model is the diode of 1N4001,1N4002 etc. at LED.This bulb can directly be connected with alternating current circuit, but, in order to strengthen illumination effect, also can set up full-wave rectifying circuit.Aforementioned protective circuit and full-wave rectifying circuit can be located on the block protection circuit board (not drawing in the drawings), and this protective circuit plate can be loaded in the space between lamp holder and the radiating element.

In the above-described embodiments, the profile of lampshade is identical with the ordinary incandescent lamp profile, and available transparent plastic or glass are made.According to needs attractive in appearance, this lampshade 13 also can be that spheroidal, oval sphere, cuboid, diamond or other have the profile of aesthetic.In addition, as shown in Figure 7, also can coat non-light transmissive material in the appropriate location of lampshade, make illumination effect numeral, letter or the literal shape of lampshade, the illumination effect among the figure is alphabetical A, can also comprise digital 0-9, letter A-Z, wait for, get several moneys wherein, can the composite door trade mark, bar signboard etc.In addition, also can coat reflecting material, make lampshade have spotlight effect in the appropriate location of lampshade.

Claims

1, a kind of light-emitting diode (LED) module comprises circuit board and is contained in a plurality of luminescent devices on the described circuit board; It is characterized in that,

Described a plurality of luminescent device is a plurality of LED wafer, is electrically connected mutually between them, and closely is arranged on the described circuit board;

The LED wafer that comprises multiple color in described a plurality of LED wafer

2, light-emitting diode (LED) module according to claim 1, it is characterized in that, described each LED wafer comprises at least two kinds in red, orange, yellow, green, blue or green, blue and the violet light diode wafer, in suitable number ratio combination, coloured light is arranged accordingly between the described versicolor LED wafer to send.

3, light-emitting diode (LED) module according to claim 1, it is characterized in that, described each LED wafer comprises at least three kinds in red, orange, yellow, green, blue or green, blue and the violet light diode wafer, make up in suitable number ratio between the described versicolor LED wafer, to send the white light that approaches natural daylight.

4, according to each described light-emitting diode (LED) module among the claim 1-3, it is characterized in that having the surface also to be laid with the printing opacity colloid that one deck is used for fixing and protects described each LED wafer at described circuit board; The heat dissipation metal plate of being close to it also is equipped with at the back side at described circuit board.

5, light-emitting diode (LED) module according to claim 4 is characterized in that,

Described a plurality of LED wafer is formed one or more branch road, and is parallel with one another on circuit between described each many branch road, is connected to the common source line that is used to introduce working power;

In each bar branch road, comprise a plurality of lamp groups, series connection successively between described a plurality of lamp groups;

In each lamp group, comprise at least two LED wafer, parallel with one another on circuit between described each LED wafer, perhaps have at least between a light-emitting diode and other light-emitting diodes between described other light-emitting diodes of reverse parallel connection in parallel in the same way.

6, a kind of light emitting diode bulb comprises lamp holder and luminous element, it is characterized in that, also comprises radiating element, and described luminous element is described light-emitting diode (LED) module;

Described radiating element is loaded on the bottom of described lamp holder, and described light-emitting diode (LED) module is close to the bottom that is installed on described radiating element;

Lead through passing described radiating element between described lamp holder and the light-emitting diode (LED) module is electrically connected.

7, light emitting diode bulb according to claim 6 is characterized in that, described lamp holder is a standard lamp head, and described radiating element is the ceramic heat-dissipating device.

8, light emitting diode bulb according to claim 6 is characterized in that, also comprises a transparent lamp shade, and described lampshade is contained in the bottom of described radiating element, and described light-emitting diode (LED) module is covered on its inside; The profile of described lampshade is identical with the ordinary incandescent lamp profile, perhaps is spheroidal, oval sphere, cuboid or diamond.

9, light emitting diode bulb according to claim 8 is characterized in that, the appropriate location of described lampshade scribbles non-light transmissive material, makes the illumination effect of lampshade be numeral, letter or literal shape.

10, light emitting diode bulb according to claim 8 is characterized in that, the appropriate location of described lampshade scribbles reflecting material, makes lampshade have spotlight effect.