CN101994991B - Energy saving lamp - Google Patents

Abstract

The invention discloses an energy saving lamp, belonging to the technical field of the energy saving lamp capable of enhancing the light energy utilization rate. The energy saving lamp comprises a luminous body, and is characterized in that a light collecting conductor is covered on the luminous body. The light collecting conductor of the invention ensures that nearly 100% of light energy passes through the surface of the light collecting conductor, thereby greatly enhancing the utilization rate of the energy. In addition, the energy saving lamp of the invention has simple structure and low production cost.

Description

Electricity-saving lamp

Technical field

The present invention relates to electricity-saving lamp technical field, more particularly to a kind of electricity-saving lamp for improving the efficiency of light energy utilization.

Background technology

Current electricity-saving lamp species is more, has plenty of and directly applies reflectance coating in lampshade inner and outer surface layers, and what is had sets plane or curved reflector in lampshade inner surface, because these structures are all more complicated, unreliable so as to there is energy-saving effect, industrial implementation difficulty is big, the problems such as performance degree of controllability is poor.LED reflector also just like Publication No. CN201203047Y, including reflector cover body, the reflector cover body is " ∏ " cup body structure, and the reflector cover body is high polymer material integrated formed structure, its cover body inwall is provided with reflectance coating, and the effect of the reflectance coating is reflection light.Although this structure can reduce the reflection loss of light, the reflection loss of part light is still unavoidable from, meanwhile, there is spraying process in process so that complex process, manufacturing cost is high.

The content of the invention

It is an object of the invention to：There is provided a kind of light efficiency height, controllability is strong, simple in construction, be easy to the electricity-saving lamp of industrial implementation.

Degree can according to the technical scheme is that：A kind of electricity-saving lamp, including illuminator, it is characterised in that：Light harvesting conductor is covered with the illuminator.

The geometry of the collection optical conductor is to be rotated a circle to be formed along illuminator central axis by total reflectance curve, and, face where illuminator is with integrating optical conductor bottom circle place face as same plane, the ultimate range of point and its geometric center on illuminator is illuminator radius r1, integrate optical conductor bottom radius of circle as r2, meet r1≤r2；The total reflectance curve, which refers to that the illumination sent on all illuminators is mapped on the curve, can be totally reflected, and the illuminator central axis refers to the geometric center by illuminator and the straight line perpendicular to illuminator.

It can be totally reflected because the illumination that illuminator is sent is mapped on the reflectivity curve, will not occur the refraction of light, the loss of light will not be produced, then illustrated that the light efficiency of the present invention is very high, improve the utilization rate of energy.Meanwhile, the geometry of this collection optical conductor can be determined by curvilinear equation, that is to say, that provide reliable foundation to industrial production.Also, the light that the present invention need not only be irradiated to collection optical conductor on collection photoconductor surface painting reflectance coating, and all illuminators can be totally reflected, the technique that so present invention eliminates spraying reflectance coating in the industrial production, so that processing technology of the present invention is very simple, cost is low.

For the ease of the industrial implementation of the present invention, the critical curve equation of total reflectance curve of the present invention is

Effective span of the equation：Y first derivative is more than 0；Wherein, x1 is the radius r1 and collection optical conductor bottom disc radius r2 sums of illuminator, and A is the cirtical angle of total reflection, and A and light harvesting conductor index n relation is that sin (90 ° of-A)=1/n is cosA=1/n.

Due to there is the chromatic dispersion problem of light, the obtaining value method of the light harvesting conductor index n is as follows：For different wavelength, the refractive index n (λ) of same media set optical conductor is also different, and n now takes the minimum value in n (λ), and the light of all colours can be totally reflected when reaching A angles to meet.

The derivation of the critical equation of the total reflectance curve is as follows：

The refractive index n of light wherein can be learnt according to the material of collection optical conductor, be totally reflected so as to try to achieve light with collecting when the angle of optical conductor material surface is less than A.It is required that all light can not all be appeared from the curve on collection optical conductor, every bit on curve is needed all to meet total reflection requirement described above.Coordinate system is set up as shown in fig. 6, x1 is the radius r1 of illuminator with collecting optical conductor bottom disc radius r2 sums, condition in Fig. 6：Y=0 during x=x1, effective span of equation：Y first derivative is more than 0,

Reach that total reflection is required, after deformation：

$y^{\′}=\frac{\tan A+\frac{y}{x}}{1-\tan A\frac{y}{x}}$

Order

Then y=tx, it is the function on x to note t

So

$t+\frac{\mathrm{dt}}{\mathrm{dx}}x=\frac{\tan A+t}{1-\tan A\·t}$

Variables separation, is obtained

$\frac{1-\tan \mathrm{At}}{\tan A(1+t^2)}\mathrm{dt}=\frac{1}{x}\mathrm{dx},$

Both sides are integrated,

The right is ln | x |,

The left side, makes l=tan θ,

So

$\&Integral;\frac{1-\tan A\tan \mathrm{\&theta;}}{\tan A{\mathrm{<figure-callout\; id="2"\; label="sec"\; filenames="H200910306199X20090827E000011.png"\; state="\{\{state\}\}">sec</figure-callout>}}^2\mathrm{\&theta;}}\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="sec"\; filenames="H200910306199X20090827E000011.png"\; state="\{\{state\}\}">sec</figure-callout>}}^2\mathrm{\&theta;d\&theta;}=\frac{\mathrm{\&theta;}}{\tan A}+\ln \left|\cos \mathrm{\&theta;}\right|,$

$\ln \left|x\right|=\frac{\mathrm{\&theta;}}{\tan A}+\ln \left|\cos \mathrm{\&theta;}\right|,$

θ is gained x again,

$\ln \left|x\right|=\frac{\arctan \frac{y}{x}}{\tan A}-\ln \left|\cos \arctan \frac{y}{x}\right|,$

Substitution condition：Y=0 during x=x1,

This equation is the critical curve (a curves in such as Fig. 7) of total reflectance curve.

The critical curve of above-mentioned total reflectance curve can also be represented with polar equation：

(the curve m) in such as Fig. 8.R represents pole axis radius, and θ represents pole axis angle.

As shown in fig. 7, the total reflectance curve is respectively positioned on the right of total reflection critical curve in rectangular coordinate system：Wherein,

Linear equation：Y=tanA (x-x1) scope of application (x1 ＜ x ＜ are a certain to be actually needed value), such a equation is present when x1 is sufficiently large.

Refractive line equation：Y=tanA (x-x1) as (x1 ＜ x ＜ x1+1),

Y=tan { arctan [tanA/ (x1+1)]+A } (x-x1-1) is as (x1+1 ＜ x ＜ x1+2), by that analogy ....

The collection optical conductor is made of fiber optic materials or optical material.

The collection optical conductor is made using PC or using PC and PBT blends or using glass.

The illuminator is disc.Circle where illuminator radius r1 is slightly less than collection optical conductor bottom disc radius r2, r1, r2 respectively is overlapped (as shown in Figure 1) in concentric manner.

The illuminator includes more than three kinds monochromatic illuminators of at least red, green, blue that substrate and substrate are provided with, and each monochromatic illuminator is evenly distributed on substrate.The light that this illuminator is sent is white light.Of course, it is possible to which selection is a kind of as needed Or several monochromatic light.

The beneficial effects of the invention are as follows：1st, it is a kind of easy method for producing white light, convenient approach is provided to the raising of colour rendering；2nd, collection optical conductor ensure that almost 100% luminous energy passes through from collection photoconductor surface, improve the utilization rate of energy；3rd, simple in construction, manufacturing cost is low.

The present invention is further described with reference to the accompanying drawings and detailed description.

Brief description of the drawings

Fig. 1 is the structural representation of the present invention；

Fig. 2 is the structural representation of one of the arrangement mode of illuminator in Fig. 1；

Fig. 3 is two structural representation of the arrangement mode of illuminator in Fig. 1；

Fig. 4 is three structural representation of the arrangement mode of illuminator in Fig. 1；

Fig. 5 is the structural representation that the light on illuminator of the present invention is totally reflected on collection photoconductor layer surface；

Fig. 6 is to solve for being totally reflected the coordinate schematic diagram that critical curve is set up；

Fig. 7 is the rectangular co-ordinate schematic diagram for being totally reflected critical curve；

Fig. 8 is the polar coordinates schematic diagram for being totally reflected critical curve；

Reference：L is illuminator, and 2 be collection optical conductor, and 3 be red monochromatic illuminator, and 4 be green monochromatic illuminator, and 5 be blue monochromatic illuminator.

Embodiment

Preferred embodiment

As shown in Figure 1, a kind of electricity-saving lamp, including illuminator 1 and the collection optical conductor 2 covered on illuminator 1, so that illuminator produces white light as an example, the illuminator 1 includes more than three kinds monochromatic illuminators of red, green, blue that substrate and substrate are provided with, and each monochromatic illuminator is evenly distributed on substrate, and its arrangement mode is as shown in Figures 2 to 4, certainly it can also be that other are arranged, as long as it is evenly distributed on substrate to meet each monochromatic illuminator.

The geometry of the collection optical conductor 2 is to be rotated a circle to be formed along the central axis of illuminator 1 by total reflectance curve, and, the place face of illuminator 1 is with integrating the bottom of optical conductor 2 circle place face as same plane, the ultimate range of point and its geometric center on illuminator 1 is illuminator radius r1, illuminator 1 is discoid in the present embodiment, the radius of the disk of illuminator 1 is illuminator radius r1, integrate optical conductor bottom radius of circle as r2, meet r1≤r2, r1, r2 respectively where circle overlap in concentric manner (as shown in Figure 1)；The total reflectance curve, which refers to that the illumination sent on all illuminators is mapped on the curve, can be totally reflected, and the illuminator central axis refers to the geometric center by illuminator and the straight line perpendicular to illuminator.

It can be totally reflected because the illumination that illuminator is sent is mapped on the reflectivity curve, will not occur the refraction of light, the loss of light will not be produced, then illustrated that the light efficiency of the present invention is very high, improve the utilization rate of energy.Meanwhile, this collection optical conductor Geometry can be determined by curvilinear equation, that is to say, that provide reliable foundation to industrial production.Further, the present invention not only need not apply reflectance coating in collection photoconductor surface so that processing technology of the present invention is very simple, and cost is low.

For the ease of the industrial implementation of the present invention, as shown in Figures 5 to 7, the critical curve equation of total reflectance curve of the present invention is

(a curves in such as Fig. 7), effective span of the equation：Y first derivative is more than 0；Wherein, x1 is the radius r1 and collection optical conductor bottom disc radius r2 sums of illuminator, and A is the cirtical angle of total reflection, and A and light harvesting conductor index n relation is that sin (90 ° of-A)=1/n is cosA=1/n.Due to there is the chromatic dispersion problem of light, the obtaining value method of the light harvesting conductor index n is as follows：For different wavelength, the refractive index n (λ) of same media set optical conductor is also different, and n now takes the minimum value in n (λ), and the light of all colours can be totally reflected when reaching A angles to meet.

The critical curve of above-mentioned total reflectance curve can also be represented with polar equation：

(the curve m) in such as Fig. 8.R represents pole axis radius, and θ represents pole axis angle.

Collect optical conductor in the present embodiment to be made of PC and PBT blends.Certainly, collection optical conductor can be made from other fiber optic materials or optical material as needed.

It should be noted that as shown in fig. 7, the total reflectance curve is respectively positioned on the right of total reflection critical curve in rectangular coordinate system：Wherein,

Linear equation：Y=tanA (x-x1) scope of application (x1 ＜ x ＜ are a certain to be actually needed value), such a equation is present when x1 is sufficiently large.

Refractive line equation：Y=tanA (x-x1) as (x1 ＜ x ＜ x1+1),

Y=tan { arctan [tanA/ (x1+1)]+A } (x-x1-1) is as (x1+1 ＜ x ＜ x1+2), by that analogy ....

Certainly, it can be selected as needed in the full transmitting curve on also some the right positioned at total reflection critical curve, practical application.

All features disclosed in this specification, or disclosed all methods or during the step of, in addition to mutually exclusive feature and/or step, can combine in any way.

Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, can alternative features equivalent by other or with similar purpose replaced.I.e., unless specifically stated otherwise, each feature is an example in a series of equivalent or similar characteristics.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., should be included in the scope of the protection.The present invention will The total reflectance curve of protection is asked to be not limited to the embodiment that the geometry for the illuminator that this example is mentioned is evolved.

Claims (5)

1. a kind of electricity-saving lamp, including illuminator, light harvesting conductor is covered with the illuminator, the geometry of the collection optical conductor is to be rotated a circle to be formed along illuminator central axis by total reflectance curve, and, face where illuminator is with integrating optical conductor bottom circle place face as same plane, and the ultimate range of point and its geometric center on illuminator is illuminator radius r1, integrate optical conductor bottom radius of circle as r2, meet r1≤r2；The total reflectance curve, which refers to that the illumination sent on all illuminators is mapped on the curve, can be totally reflected, the illuminator central axis refers to the geometric center by illuminator and the straight line perpendicular to illuminator, and the critical curve equation of the total reflectance curve is lnIxI=

Effective span of the equation is more than 0 for y first derivative；Wherein, x1 is the radius r1 and collection optical conductor bottom disc radius r2 sums of illuminator, and A is the cirtical angle of total reflection, and A and light harvesting conductor index n relation is that sin (90 ° of-A)=1/n is cosA=1/n；The critical curve of the total reflectance curve can also be represented with polar equation：

R represents pole axis radius, and θ represents pole axis angle, and the obtaining value method of the light harvesting conductor index n is as follows：

For different wavelength, the refractive index n (λ) of same media set optical conductor is also different, and n now takes the minimum value in n (λ), and the light of all colours can be totally reflected when reaching A angles to meet, it is characterised in that：The total reflectance curve is respectively positioned on the right of total reflection critical curve in rectangular coordinate system, wherein, equation is y=tanA (x-x1) as (x1 ＜ x ＜ x1+1), Y=tan { arctan [tanA/ (x1+1)]+A } (x-x1-1) is as (x1+1 ＜ x ＜ x1+2), by that analogy ....

2. electricity-saving lamp according to claim 1, it is characterised in that：The collection optical conductor is made of fiber optic materials or optical material.

3. electricity-saving lamp according to claim 2, it is characterised in that：The collection optical conductor is made using PC or using PC and PBT blends or using glass.

4. electricity-saving lamp according to claim 1, it is characterised in that：The illuminator is disc.

5. electricity-saving lamp according to claim 4, it is characterised in that：The illuminator includes more than three kinds monochromatic illuminators of at least red, green, blue that substrate and substrate are provided with, and each monochromatic illuminator is evenly distributed on substrate.

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