CN201081109Y

CN201081109Y - LEDLED desk lamp

Info

Publication number: CN201081109Y
Application number: CNU2007200721462U
Authority: CN
Inventors: 孙庆和
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-04
Filing date: 2007-07-04
Publication date: 2008-07-02
Anticipated expiration: 2017-07-04

Abstract

The utility model discloses an LED table lamp, which comprises an LED light source and a lamp shade, wherein the LED light source comprise a single LED; moreover, the opening of the light shade is provided with a concavo-convex lens or a concave lens. The LED table lamp not only accords with the national technical standard for table lamp illumination, but also has the advantage of uniform illuminance light spot, which further improves product performance; moreover, the table lamp can protect human eyesight.

Description

The LED desk lamp

Technical field

The utility model belongs to the lighting technical field, relates to a kind of light fixture, relates in particular to a kind of LED desk lamp.

Background technology

The LED lamp be called as the 4th generation lighting source, be also referred to as green light source, the advantage that has energy-saving and environmental protection, the life-span is long, volume is little and can be arbitrarily made with various patterns, therefore, the LED light fixture has very application prospects and field, can be applied to various indications, demonstration, decoration, background illumination, general lighting and urban landscape.Therefore, at the desk lamp lighting field, the LED desk lamp has appearred also.

LED desk lamp light source in the market is to adopt tens of or even nearly hundred LED luminescent panels that the super bright white light LEDs of common 0.1W combines with series-parallel mode basically.Such LED desk lamp has following problem:

1), because LED luminous is that point is luminous, the irradiation of its light is the straight line irradiation, the central point light of straight line irradiation is very strong, and the vignette around some light of its generation is very weak.If adopt plurality of LEDs to be combined into the light source on plane, the formed illumination hot spot of the light that LED sends just becomes the stack of a light and vignette, the mixture of strong and weak light just, the final illumination hot spot that forms just has obviously bright and dark uneven phenomenon, the spot that will occur the depth on the photographed object, working and learning under this luminous environment for a long time can produce grievous injury to people's eyesight.

2), because LED adopts the principle in-depth of diode to form, because of the discreteness of the internal resistance of diode is very big, thereby the internal resistance of same LED also just produces identical discreteness.LED-based operation principle, LED requires very strict to operating current.Therefore, if the internal resistance uniformity of each LEDs of combining is not good, the last illumination that produces also just can not be consistent, and the final brightness of its result is uneven.Even in product early stage each LEDs is worn out, screens the coupling combination, but through the use effect (being degradation period) in about 500～1000 hours of growth stage in after a while product early stage, obviously about 10～30% optical attenuation phenomenons can appear in single LEDs.In the whole LED desk lamp tens or nearly hundred s' LED like this, (in fact there is this phenomenon really in the LED desk lamp on the market as the LED of fruit part serious optical attenuation to take place, that have even indivedual LED occur and do not work), thereby cause whole illumination hot spot serious piebald to occur, influence the serviceability of product and infringement people's eyesight.

The utility model content

The purpose of this utility model has overcome for LED desk lamp, this LED desk lamp that provides a kind of illumination hot spot spot or piebald evenly, can not occur, meets desk lamp illumination national technical standard because the illumination hot spot spottiness that plurality of LEDs combination and LED decay bring and the problem of piebald, thereby makes the product serviceability be improved and then protected people's eyesight.

To achieve these goals, a kind of LED desk lamp of the present utility model adopts following technical scheme:

A kind of LED desk lamp comprises led light source and lampshade, it is characterized in that: described led light source is single LEDs, is provided with concave-convex lens or concavees lens on the cover mouth of lampshade.

The utility model adopts single LEDs as light source, the hot spot of its generation is an integral body, even it had optical attenuation and uses the later stage that light decay is arranged in the growth stage, its decay also is the decay of an integral body, its final illumination hot spot that occurs is still a uniform whole hot spot, does not exist flat luminous LED desk lamp that tens or nearly hundred LEDs form because each LEDs decay difference produces the non-uniform phenomenons of illumination hot spot.In addition, the effect of establishing concave-convex lens or concavees lens on the case of lampshade is that the some light that LED sends is decomposed into uniform surface light source, make the hot spot of the final illumination of desk lamp become uniform light spots, solved some light and vignette and produced strong and weak problem of mixing the harmful spot of existence, and then eliminated the inpairment of vision of LED desk lamp the people.Therefore; the utility model adopts above-mentioned corrective measure, makes LED desk lamp of the present utility model not only meet desk lamp illumination national technical standard, and has illumination hot spot advantage of uniform; make properties of product be further enhanced, and then have the effect of protection people's eyesight.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is elaborated:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a led light source imaging schematic diagram of the present utility model;

Fig. 3 is the schematic diagram of concavees lens.

Among the figure:

1, lampshade 11, cover mouth 2, led light source 3, concave-convex lens

4, the light bowl 5, radiator 51, aluminium alloy plate 52, aluminum alloy heat sink

6, the illumination hot spot 7, concavees lens

The specific embodiment

As shown in Figure 1, a kind of LED desk lamp of the present utility model comprises lampshade 1, led light source 2, concave-convex lens 3 or concavees lens 7.Described led light source 2 adopts single LEDs, and this list LEDs should be selected high-power LED for use, particularly, can select the LED of 1W.Be provided with concave-convex lens 3 (lens of shape indent evagination) or concavees lens 7 (the outer flat lens of shape indent as shown in Figure 3) at cover mouth 11 places of lampshade 1.In the present embodiment, preferred concave-convex lens 3.

Adopt single high-power LED as light source, the hot spot of its generation is an integral body, even it had optical attenuation and uses the later stage that light decay is arranged in the growth stage, its decay also is the decay of an integral body, its final illumination hot spot 6 that occurs is still a uniform whole hot spot, does not exist flat luminous LED desk lamp that tens or nearly hundred LEDs form because each LEDs decay difference produces the non-uniform phenomenons of illumination hot spot.

In addition, as shown in Figure 2, the effect that the cover mouth 11 of lampshade 1 is established concave-convex lens 3 or concavees lens 7 is that the some light that LED sends is decomposed into uniform surface light source, make the illumination hot spot 6 of the final illumination of desk lamp become uniform light spots, solved some light and vignette and produced strong and weak problem of mixing the harmful spot of existence, and then eliminated inpairment of vision the people.Preferred concave-convex lens 3 makes invocation point light be decomposed into the better effects if of uniform face radiant.

For the intensity of illumination that obtains area source is further strengthened, to meet or exceed national desk lamp lighting criteria as much as possible, be provided with light bowl 4 at lampshade 1 inner surface, described light bowl 4 can be structure as a whole with lampshade 1 (carrying out plated film as the inner surface at lampshade 1), also can be that independently the light bowl is installed in the inner surface of lampshade 1.Like this, reflective and the optically focused effect of light bowl 4 has been arranged, just the light that LED can be sent reflects by concave-convex lens 3 or concavees lens 7 as much as possible, thereby makes that the illumination of LED desk lamp is strengthened, to meet or even to surpass national desk lamp illumination national technical standard.

Adopt above-mentioned structure, just make whole lampshade 1 become the structure of a sealing, if LED works long hours in the lampshade of this sealing, the heat accumulation that produces gets up, to make case temperature raise, and environment temperature can be quickened the decay of LED in the too high cover, reduces the service life of LED.Therefore, for the heat that can make LED produce can discharge in lampshade 1 as early as possible, the top of described lampshade 1 is provided with radiator 5, described radiator 5 is made of aluminium alloy plate 51 and the aluminum alloy heat sink 52 that is distributed in aluminium alloy plate 51 backs, wherein, single LEDs just is installed on this aluminium alloy plate 51.Aluminium alloy has good heat conductivity, adopts aluminum alloy heat sink to increase area of dissipation again simultaneously, just makes radiator 5 fast heat in the lampshade 1 to be distributed, thereby delays the decay of LED, the service life of improving LED.

In the present embodiment, described light bowl inner height is 21.5mm, and light bowl internal orifice diameter is 36mm.Through detecting, when luminous point during apart from photographed object surface 30～40cm, its formation be 32～45cm at the lip-deep illumination spot diameter of photographed object, the illumination intensity of its generation is greater than 300Lx, and the illumination hot spot that forms is even, be speckless, do not have piebald, meet desk lamp illumination national technical standard fully.

By above-mentioned detailed introduction, as can be seen, LED desk lamp of the present utility model can meet the national technical standard of desk lamp illumination, and has illumination hot spot advantage of uniform, makes properties of product be further enhanced, and then has the effect of protection people's eyesight.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop on claim scope of the present utility model to variation, the modification of the above embodiment.

Claims

1. a LED desk lamp comprises led light source and lampshade, it is characterized in that: described led light source is single LEDs, is provided with concave-convex lens or concavees lens on the cover mouth of lampshade.

2. LED desk lamp according to claim 1 is characterized in that: described lampshade inner surface is provided with the light bowl.

3. LED desk lamp according to claim 2 is characterized in that: described lampshade and light bowl are structure as a whole.

4. LED desk lamp according to claim 1 is characterized in that: the top of described lampshade is provided with radiator.

5. LED desk lamp according to claim 4 is characterized in that: described radiator is made of aluminium alloy plate and the aluminum alloy heat sink that is distributed in the aluminium alloy plate back, and described single LEDs is fixed on the aluminium alloy plate.

6. LED desk lamp according to claim 2 is characterized in that: described light bowl inner height is 21.5mm, and the diameter of light bowl internal orifice is 36mm.