CN204986447U - Directional lamp of anti -dazzle LED of high light efficiency based on positive and negative two -way fresnel lens - Google Patents

Abstract

The utility model discloses a directional lamp of anti -dazzle LED of high light efficiency based on positive and negative two -way fresnel lens, including LED base plate, reflector, forward fresnel lens and reverse fresnel lens, the reflector sets up on the LED base plate, forward fresnel lens sets up in the cavity of reflector, and forward fresnel lens installs in the bottom of reflector, the reverse unsettled top of erectting at the reflector of fresnel lens to LED base plate geometric centre is the datum point, and 0 - gamma is cut apart into to the luminous angle of chip and gamma - 90 two rings takes the part. The utility model discloses unsettled structural design forward fresnel lens shortens the optical distance and has reduced the light loss, and optics efficiency improves 5%, and central light intensity improves 30%. In addition the utility model discloses just, the two -way design fresnel lens that turns over plays the spotlight effect, reaches the effect that improves central light intensity, can realize replacing the high power halogen lamp LED.

Description

The anti-dazzle LED oriented lamp of specular removal based on positive and negative two-way Fresnel Lenses

Technical field

The utility model relates to the research field of LED luminous intensity distribution, particularly the anti-dazzle LED oriented lamp of a kind of specular removal based on positive and negative two-way Fresnel Lenses.

Background technology

Illuminating industry COB chip price can be in any more both at home and abroad at present, middle power chip module becomes because of cheap the favorite pursued, but because single source chip has relative independentability, adopt PC Lens Design during general secondary light-distribution design or adopt aluminum coated reflector, cause there is following technical problem in LED oriented lamp secondary light-distribution: 1, the low light efficiency of middle power chip module, energy consumption is high, replaces Halogen lamp LED power generally on the low side; 2, secondary light-distribution design illuminance uniformity difficulty controls.So, a kind of direction of those skilled in the art's research when making hot spot more uniform anti-dazzle LED oriented lamp.

Utility model content

Main purpose of the present utility model is that the shortcoming overcoming prior art is with not enough, provides a kind of specular removal based on positive and negative two-way Fresnel Lenses anti-dazzle LED oriented lamp, shortens light path and reduce light loss, improve optical efficiency.

In order to achieve the above object, the utility model is by the following technical solutions: the anti-dazzle LED oriented lamp of a kind of specular removal based on positive and negative two-way Fresnel Lenses, comprise LED-baseplate, reflector, forward Fresnel Lenses and oppositely Fresnel Lenses, described reflector is arranged in LED-baseplate, described forward Fresnel Lenses is arranged in the cavity of reflector, forward Fresnel Lenses is arranged on the bottom of reflector, described reverse Fresnel Lenses suspension frame is located at the top of reflector, with LED-baseplate geometric center for datum mark, chip light emitting angle is divided into 0 °-γ ° and γ ° of-90 ° of two band portions.

Preferably, the luminous intensity distribution of described 0 ° of-γ ° of endless belt is designed to:

Light i is through reflector reflects, and it is light and X-axis angle that propagate light energy meets reflection law incidence angle α=angle of reflection β, θ angle, and μ angle is p point slope angle, P (x, y) on bent i1 face a bit, then P point slope is:

tan(μ)＝dy/dx；(1)

Again by $\mathrm{\θ}=\mathrm{\α}+\mathrm{\β}-\frac{\mathrm{\π}}{2};---\left(2\right)$

Again because light i1 is that middle power modules LED-baseplate direction is propagated, can draw solve (1), (2) draw and provide the differential equation F (dx, dy) of P P point initial position, just can calculate P point 0 ° of-γ ° of various point locations, simulate the free-curved-surface-type of reflector.

Preferably, the luminous intensity distribution of described γ °-90 ° of endless belt is designed to:

The forward Fresnel Lenses that light j designs through hanging structure and reverse Fresnel Lenses reflect, and by regulating the free form surface curvature on forward and reverse Fresnel Lenses gear, free form surface meets Fresnel equation:

$F\left(Z\right)=\frac{{\mathrm{cr}}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+a_1{r}^2+a_2{r}^4+a_3{r}^6+a_4{r}^8+a_5{r}^{10}+a_6{r}^{12}+a_7{r}^{14}+a_8{r}^{16}---\left(3\right)$

Wherein, k is slope, and r is free form surface slope radius, and а 1........ а 8 is coefficient, regulates parameters to change light refraction angle, if forward Fresnel Lenses free form surface equation is F ₁(Z), reverse Fresnel Lenses free form surface equation is F ₂(Z) parameter, adjusting two equations reflects from making light according to target area.

Preferably, described LED-baseplate is provided with plurality of LEDs Light-Emitting Diode, and described plurality of LEDs Light-Emitting Diode is by setting shaped formation in LED-baseplate.

Preferably, the edge of described reverse Fresnel Lenses is provided with a circle groove, and the top outer edge of described groove and reflector matches, and during installation, reverse Fresnel Lenses is fastened on reflector.

Preferably, the inner surface on described reflector is provided with the free form surface of curvature-adjustable.

Preferably, described reflector is the reflector of aluminium material.

Preferably, the gear of described reverse Fresnel Lenses is provided with the free form surface of curvature-adjustable, and gear arrangement is in concentric ring.

Preferably, described forward Fresnel Lenses is provided with multiple installation foot, and described installation foot is fixed on the gear of described reverse Fresnel Lenses on bottom reflector and is provided with the free form surface of curvature-adjustable, and gear arrangement is in concentric ring.

Preferably, the diameter of described forward Fresnel Lenses is less than the diameter of reflector bottom opening.

Compared with prior art, tool has the following advantages and beneficial effect the utility model:

1, the utility model hanging structure design forward Fresnel Lenses, shorten light path and reduce light loss, optical efficiency improves 5%, and central light strength improves 30%.

2, the positive and negative bi-directional design Fresnel Lenses of the utility model plays spotlight effect, reaches the effect improving central light strength, can realize replacing high power Halogen lamp LED.

3, the space that reflector of the present utility model and Fresnel Lenses mode make light source exposed becomes large, and reflector material is aluminium, adds the heat radiation of LED light source to a certain extent;

4, the utility model solves current reflector edge when optical design and occurs the problem of the ring of light, makes hot spot more even.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model device;

Fig. 2 is the exploded view of the utility model device;

Fig. 3 is that the utility model chip light emitting angle is divided into 0 °-γ °, the schematic diagram of γ ° of-90 ° of two band portions;

Fig. 4 is the utility model 0 °-γ ° endless belt luminous intensity distribution schematic diagram;

Fig. 5 is the utility model γ °-90 ° endless belt luminous intensity distribution schematic diagrames;

Fig. 6 is the layout drawing of the utility model LED Light-Emitting Diode on substrate.

Detailed description of the invention

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.

Embodiment

As shown in Figure 1 and Figure 2, the present embodiment is based on the anti-dazzle LED oriented lamp of specular removal of positive and negative two-way Fresnel Lenses, comprise LED-baseplate 1, reflector 2, forward Fresnel Lenses 3 and reverse Fresnel Lenses 4, described reflector 2 is arranged in LED-baseplate 1, described forward Fresnel Lenses 3 is arranged in the cavity of reflector 2, forward Fresnel Lenses 3 is arranged on the bottom of reflector, and described reverse Fresnel Lenses 4 suspension frame is located at the top of reflector 2; Middle power modules geometric center is datum mark, and chip light emitting angle is divided into 0 °-γ °, and γ ° of-90 ° of two band portions, carry out independent design for two partial optical.

In order to reach better light-out effect, in the present embodiment, described LED-baseplate 1 is provided with plurality of LEDs Light-Emitting Diode, described plurality of LEDs Light-Emitting Diode is by setting shaped formation in LED-baseplate 1, as shown in Figure 6, in the present embodiment, LED light emitting diode divides inside and outside two-layer layout, and skin is set to circle, and internal layer is set to rectangle.

As shown in Figure 2, the edge of described reverse Fresnel Lenses 4 is provided with a circle groove, and the top outer edge of described groove and reflector 2 matches, and during installation, reverse Fresnel Lenses 4 is fastened on reflector 2.

Inner surface on described reflector 2 is provided with the free form surface of curvature-adjustable, by adjustment reflector free form surface curvature, the light reflected through reflector 2 is propagated perpendicular to middle power modules LED-baseplate 1 direction.

In like manner, the gear of described reverse Fresnel Lenses 4 is provided with the free form surface of curvature-adjustable, light reflects through hanging structure design forward Fresnel Lenses 3 and reverse Fresnel Lenses 4, by regulating the free form surface curvature on Fresnel Lenses gear, changing light refraction angle, reflecting according to target area from making light.

In the present embodiment, described reflector is the reflector of aluminium material, adds the heat radiation of LED light source to a certain extent.

As shown in Figure 2, described forward Fresnel Lenses is provided with multiple installation foot, and described installation foot is fixed on bottom reflector; The diameter of described forward Fresnel Lenses is less than the diameter of reflector bottom opening.

Operation principle of the present utility model is as follows:

With LED-baseplate geometric center for datum mark, chip light emitting angle is divided into 0 °-γ °, and γ ° of-90 ° of two band portions are as Fig. 3, and wherein tan γ=H/D, H are the height of reflector, and D is the radius of reflector.Whole hemisphere can be divided into two endless belt that is 0 °-γ °, γ °-90 °.Independent design is carried out for two partial optical.

1,0 °-γ ° endless belt luminous intensity distribution design: as Fig. 4, light i is through reflector reflects, and propagate light energy meets reflection law incidence angle α=angle of reflection β, θ angle is light and X-axis angle, and μ angle is p point slope angle, P (x, y) on bent i1 face a bit, then P point slope is:

tan(μ)＝dy/dx；(1)

Again by $\mathrm{\θ}=\mathrm{\α}+\mathrm{\β}-\frac{\mathrm{\π}}{2};---\left(2\right)$

Again because light i1 is that middle power modules LED-baseplate direction is propagated, can draw solve (1), (2) draw and provide the differential equation F (dx, dy) of P P point initial position, just can calculate P point 0 ° of-γ ° of various point locations, simulate the free-curved-surface-type of reflector;

2, γ °-90 ° endless belt luminous intensity distribution designs: common reflector designs this some light generally two kinds of modes, one does not add any optical lens and controls, cause like this light pollution, energy dissipation and be easy to formed dizzy, another program uses convex lens to wrap up whole light source to change its light path, although this mode controls better at light, extreme loss luminous energy.In order to can specular removal be met and precisely light control, creativeness proposes hanging structure design forward Fresnel Lenses (as Fig. 5), light j reflects through hanging structure design forward Fresnel Lenses and reverse Fresnel, by regulating the free form surface curvature on forward and reverse Fresnel Lenses gear, free form surface meets Fresnel equation:

$F\left(Z\right)=\frac{{\mathrm{cr}}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+a_1{r}^2+a_2{r}^4+a_3{r}^6+a_4{r}^8+a_5{r}^{10}+a_6{r}^{12}+a_7{r}^{14}+a_8{r}^{16}---\left(3\right)$

Wherein, k is slope, and r is free form surface slope radius, and а 1........ а 8 is coefficient.Regulate parameters to change light refraction angle, (as Fig. 5) sets forward Fresnel Lenses free form surface equation as F ₁(Z), reverse Fresnel Lenses free form surface equation is F ₂(Z) parameter, adjusting two equations reflects from making light according to target area.The light of γ-90 ° of ring belt areas can be controlled more accurately, can not cause dizzy, owing to being unsettled design, 0 ° of-γ ring belt area light is directly through reflector reflects, and optical efficiency improves 5%, and central light strength improves 30%.

Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.

Claims (10)

1. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses, it is characterized in that, comprise LED-baseplate, reflector, forward Fresnel Lenses and reverse Fresnel Lenses, described reflector is arranged in LED-baseplate, described forward Fresnel Lenses is arranged in the cavity of reflector, forward Fresnel Lenses is arranged on the bottom of reflector, described reverse Fresnel Lenses suspension frame is located at the top of reflector, with LED-baseplate geometric center for datum mark, chip light emitting angle is divided into 0 °-γ ° and γ ° of-90 ° of two band portions.

2. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, it is characterized in that, the luminous intensity distribution of described 0 ° of-γ ° of endless belt is designed to:

Light i is through reflector reflects, and it is light and X-axis angle that propagate light energy meets reflection law incidence angle α=angle of reflection β, θ angle, and μ angle is p point slope angle, P (x, y) on bent i1 face a bit, then P point slope is:

tan(μ)＝dy/dx；(1)

Again by $\mathrm{\θ}=\mathrm{\α}+\mathrm{\β}-\frac{\mathrm{\π}}{2};---\left(2\right)$

Again because light i1 is that middle power modules LED-baseplate direction is propagated, can draw solve (1), (2) draw and provide the differential equation F (dx, dy) of P P point initial position, just can calculate P point 0 ° of-γ ° of various point locations, simulate the free-curved-surface-type of reflector.

3. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, it is characterized in that, the luminous intensity distribution of described γ °-90 ° of endless belt is designed to:

The forward Fresnel Lenses that light j designs through hanging structure and reverse Fresnel Lenses reflect, and by regulating the free form surface curvature on forward and reverse Fresnel Lenses gear, free form surface meets Fresnel equation:

$F\left(Z\right)=\frac{{\mathrm{cr}}^2}{1+\sqrt{1-(1+k)c^2{r}^2}}+a_1{r}^2+a_2{r}^4+a_3{r}^6+a_4{r}^8+a_5{r}^{10}+a_6{r}^{12}+a_7{r}^{14}+a_8{r}^{16}---\left(3\right)$

Wherein, k is slope, and r is free form surface slope radius, and а 1........ а 8 is coefficient, regulates parameters to change light refraction angle, if forward Fresnel Lenses free form surface equation is F ₁(Z), reverse Fresnel Lenses free form surface equation is F ₂(Z) parameter, adjusting two equations reflects from making light according to target area.

4. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, it is characterized in that, described LED-baseplate is provided with plurality of LEDs Light-Emitting Diode, and described plurality of LEDs Light-Emitting Diode is by setting shaped formation in LED-baseplate.

5. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, it is characterized in that, the edge of described reverse Fresnel Lenses is provided with a circle groove, the top outer edge of described groove and reflector matches, during installation, reverse Fresnel Lenses is fastened on reflector.

6. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, it is characterized in that, the inner surface on described reflector is provided with the free form surface of curvature-adjustable.

7. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1 or 6, it is characterized in that, described reflector is the reflector of aluminium material.

8. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, is characterized in that, the gear of described reverse Fresnel Lenses is provided with the free form surface of curvature-adjustable, and gear arrangement is in concentric ring.

9. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, it is characterized in that, described forward Fresnel Lenses is provided with multiple installation foot, described installation foot is fixed on the gear of described reverse Fresnel Lenses on bottom reflector and is provided with the free form surface of curvature-adjustable, and gear arrangement is in concentric ring.

10. the anti-dazzle LED oriented lamp of the specular removal based on positive and negative two-way Fresnel Lenses according to claim 1, is characterized in that, the diameter of described forward Fresnel Lenses is less than the diameter of reflector bottom opening.