CN201057380Y

CN201057380Y - LED illumination device

Info

Publication number: CN201057380Y
Application number: CNU200720068411XU
Authority: CN
Inventors: 楼红献
Original assignee: Ningbo Andy Optoelectronic Co Ltd
Current assignee: Ningbo Andy Optoelectronic Co Ltd
Priority date: 2007-03-29
Filing date: 2007-03-29
Publication date: 2008-05-07
Anticipated expiration: 2017-03-29

Abstract

The utility model relates to a LED illumination device which comprises a shell and a plurality of LEDs which are held inside the shell. The shell is provided with a curve fixing base which comprises a first curved face part and a second curved face part and the LEDs are fixed on the first curved face part and the second curved face part which are both take the shape of an internally concave arc face; the second curved face of the fixing base is symmetrically arranged at the two sides of the first curved face of the fixing base. By arranging the curve fixing base inside the LED illumination device, the utility model greatly increases the light emitting angle of the LED illumination device and leads the light matched curve of the whole illumination device to engage in a bat wing shape and reduce the possibility of the appearance of light rings or dark spots without increasing the volume of the existing LED illumination device, thereby greatly enhancing the uniformity of the lighting brightness of the LED illumination device and further effectively improving the lighting effect thereof.

Description

The LED lighting device

[technical field]

The utility model relates to a kind of LED lighting device, more precisely, relates to a kind of LED lighting device with better illuminating effect.

[background technology]

LED has advantages such as environmental protection, energy-conservation, life-span be long and is regarded as the 21 century lighting source, but LED has specific lighting angle, can't be as conventional light source lighting angle big and evenly, therefore application is subjected to certain restriction.

Fig. 1 is the distribution curve flux schematic diagram of LED, and its abscissa α represents the hot spot angle of LED irradiation, and ordinate I represents luminous intensity.The maximum of described LED luminous intensity represents with 1.0, according to the definition of lighting angle as can be known, drops to the hot spot angle α of its peaked half when the luminous intensity of LED ₁Be its lighting angle.From figure, can find out intuitively,, then sharply descend in both sides, and energy mainly concentrate on very little hot spot angle α in the luminous intensity maximum of the centre normal direction LED of LED ₁In, so the non-constant of illumination uniformity of single LEDs.

Fig. 2 is the illumination schematic diagram that LED directly is used in lighting device, and it is the plane LED 22 that is provided with the several parameters unanimity on main body 21.The lighting angle of described LED22 is θ, and the maximum hot spot angle of described LED lighting device is α ₃, the hot spot angle that light intensity drops to largest light intensity one half is α ₂Obviously, described hot spot angle α ₂Be the lighting angle of LED lighting device.Because the lighting angle θ of LED is less, and the parameter of each LED22 is all consistent and be the plane and be provided with, and causes the distribution of the light intensity stack back light intensity that each LED 22 produces and the light distribution of single LEDs to be more or less the same the lighting angle α of LED lighting device ₂Still very little, its distribution curve flux as shown in Figure 3.As seen from the figure, the light intensity of LED lighting device remains the center maximum and energy mainly concentrates on very little angle [alpha] ₂In, and in the β angular range, light intensity sharply descends, thus cause the illumination uniformity of LED lighting device still very poor.

[utility model content]

The purpose of this utility model is to overcome the defective that exists in the prior art, provides a kind of brightness of illumination uniformity high LED lighting device.

The utility model LED lighting device is achieved through the following technical solutions: a kind of LED lighting device, comprise housing and some LED, wherein said LED is contained in the described housing, be provided with a curved surface shape fixed pedestal in the described housing, this fixed pedestal comprises the first surface portion and second curved face part, described LED is fixed on the described first surface portion and second curved face part, described fixed pedestal first surface portion and fixed pedestal second curved face part all are the concave shaped arc surfaced, wherein, fixed pedestal second curved face part is symmetricly set in the both sides of described fixed pedestal first surface portion.

Described fixed pedestal first surface portion is connected with the fixed pedestal second curved face part smooth transition.

Be arranged on the LED in the fixed pedestal first surface portion and be arranged on LED on fixed pedestal second curved face part along the center of fixed pedestal toward both sides symmetric arrays in regular turn.

Described LED increases progressively toward the both sides light intensity successively along the center of lighting device.

Also comprise a reflection unit, this reflection unit comprises reflection first surface portion and reflects second curved face part.

Described reflection first surface portion and reflection second curved face part all are the concave shaped arc surfaced, wherein reflect the both sides that second curved face part is symmetricly set in described reflection first surface portion.

The surface of this reflection unit inwall is provided with pit, projection or the ripple of regular or irregular different shape.

Described curved surface shape fixed pedestal can be integrally formed and form with housing, and also moulding is separately fixedlyed connected with described housing by fixture.

Compared with prior art, the utility model is by being provided with a curved surface shape fixed pedestal in the LED lighting device, make under the situation that does not increase existing LED lighting device volume, the radiative angle of LED lighting device is increased greatly and make the distribution curve flux of entire lighting device mesh bat wing as far as possible, reduced the possibility that the ring of light or blackening occur, thereby improved the uniformity of LED lighting device lighting brightness to a great extent, and then improved the illuminating effect of LED lighting device effectively.

[description of drawings]

Fig. 1 is a LED distribution curve flux schematic diagram in the prior art;

Fig. 2 directly is used in the illumination schematic diagram of lighting device for LED in the prior art;

Fig. 3 directly is used in the distribution curve flux schematic diagram of lighting device for LED in the prior art;

Fig. 4 is the three-dimensional exploded view of the utility model LED lighting device embodiment.

[specific embodiment]

See also shown in Figure 4, the LED lighting device 8 that the utility model disclosed comprises housing 1, circuit board 2, some LED (not label) and lens devices 3, reflection unit 4, sealing ring 5 and light-emitting plate 6, wherein, described LED and lens devices 3 are contained in the described housing 1, and described light-emitting plate 6 is fixed on the housing 1 and with described LED and lens devices 3 thereof and is encapsulated in this housing 1.

Described housing 1 is made by the good material of heat conductivility (such as aluminium), be provided with a curved surface shape fixed pedestal 10 in the housing 1, this fixed pedestal 10 includes fixed pedestal first surface portion 101 and fixed pedestal second curved face part 102, fixed pedestal first surface portion 101 and fixed pedestal second curved face part 102 all are concave shaped arc surfaced and the two smooth transition and connect, and described fixed pedestal second curved face part 102 is symmetricly set in the both sides of described fixed pedestal first surface portion 101.Described LED by circuit board along the center of fixed pedestal toward both sides in regular turn symmetric arrays be fixed on described fixed pedestal first surface portion 101 and fixed pedestal second curved face part 102, in order better to improve the illumination effect of LED lighting device, described LED increases progressively toward the both sides light intensity successively along the center of lighting device; Described fixed pedestal 10 can be one-body molded and form (present embodiment employing integrated molding) with housing 1, and also moulding is separately fixedlyed connected with described housing 1 by fixture then.In addition, also be provided with some fin 11, a support 12 on the housing 1, described support 12 is used for support housing 1, and it links to each other with housing 1 by screw 13, and these structures are disclosed by prior art, are not giving unnecessary details at this.

Described circuit board 2 is for flexible PCB and have good heat-conducting, and it is made up of some strip circuit boards 21, and LED and lens devices 3 thereof evenly are installed on the strip circuit board 21, and number and the packing density of LED are set according to actual needs.LED can serial or parallel connection or both be connected, after preferably the LED on each strip circuit board 21 is connected in series mutually again with adjacent strip circuit board 21 on LED be connected in parallel.Described lens devices 3 comprises lens (not label) and lens carrier (not label), and described lens devices 3 is used to assemble the light that LED sends.Certainly foregoing circuit plate 2 also can be formed or be made up of a lot of fritter circuit boards by a monoblock circuit board.Described lens devices 3 can certainly be replaced by other beam condensing units such as prefocus cup.

Described reflection unit 4 is provided with a curved diapire 40 and extends four sidewalls 41 that are provided with by diapire 40 convex direction outside diapire 40, described curved surface shape diapire 40 includes reflection first surface portion 401 and reflects second curved face part 402, described reflection first surface portion 401 and reflect that second curved face part 402 all is the concave shaped arc surfaced and the two smooth transition connects, described reflection second curved face part 402 is symmetricly set in the both sides of described reflection first surface portion 401.Described curved surface shape diapire 40 is provided with some holes 400, this hole 400 is passed through for LED, the inwall 42 of described reflection unit 4 (comprising diapire 40 and sidewall 41) surface is provided with one deck reflectance coating, and the surface of described reflection unit inwall 42 is contoured diffuse surface (not shown), such as the pit that is formed with rule or irregular different shape on the surface, projection or ripple etc.

Light-emitting plate 6 is a light-passing board, and it can also can be common plate glass for playing the lens of convergence or disperse function.

During assembling, at first LED and lens devices 3 thereof are fixed on the circuit board 2, then circuit board 2 are fixed on the described fixed pedestal 10, described LED and lens devices 3 thereof are contained in the described housing 1, more described reflection unit is installed on the housing 1.For better waterproof, a waterproof grommet 5 is installed also between light-emitting plate 6 and housing 1.

The utility model is by being provided with a curved surface shape fixed pedestal 10 in LED lighting device 8, make under the situation that does not increase existing LED lighting device 8 volumes, LED lighting device 8 radiative angles are increased greatly and make the distribution curve flux of entire lighting device 8 mesh bat wing as far as possible, reduced the possibility that the ring of light or blackening occur, thereby improved the uniformity of LED lighting device 8 brightness of illuminations to a great extent, and then improved the illuminating effect of LED lighting device 8 effectively.

More than describing is embodiment of the present utility model only, forgives and can understand, and under the prerequisite that does not depart from the utility model design, all should be included within the technical conceive of the present utility model simple modification of the present utility model and replacement.

Claims

1. LED lighting device, comprise housing and some LED, wherein said LED is contained in the described housing, it is characterized in that: be provided with a curved surface shape fixed pedestal in the described housing, this fixed pedestal comprises the first surface portion and second curved face part, described LED is fixed on the described first surface portion and second curved face part, described fixed pedestal first surface portion and fixed pedestal second curved face part all are the concave shaped arc surfaced, wherein, fixed pedestal second curved face part is symmetricly set in the both sides of described fixed pedestal first surface portion.

2. LED lighting device as claimed in claim 1 is characterized in that: described fixed pedestal first surface portion is connected with the fixed pedestal second curved face part smooth transition.

3. LED lighting device as claimed in claim 1 or 2 is characterized in that: be arranged on the LED in the fixed pedestal first surface portion and be arranged on LED on fixed pedestal second curved face part along the center of fixed pedestal toward both sides symmetric arrays in regular turn.

4. LED lighting device as claimed in claim 3 is characterized in that: described LED increases progressively toward the both sides light intensity successively along the center of lighting device.

5. LED lighting device as claimed in claim 1 is characterized in that: also comprise a reflection unit, this reflection unit comprises reflection first surface portion and reflects second curved face part.

6. as each described lighting device in the claim 5, it is characterized in that: described reflection first surface portion and reflection second curved face part all are the concave shaped arc surfaced, wherein reflect the both sides that second curved face part is symmetricly set in described reflection first surface portion.

7. LED lighting device as claimed in claim 6 is characterized in that: the surface of this reflection unit inwall is provided with pit, projection or the ripple of regular or irregular different shape.

8. LED lighting device as claimed in claim 1 is characterized in that: described curved surface shape fixed pedestal can be integrally formed and form with housing, and also moulding is separately fixedlyed connected with described housing by fixture.