CN203784727U - Optical element and lighting system - Google Patents
Optical element and lighting system Download PDFInfo
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- CN203784727U CN203784727U CN201320675608.5U CN201320675608U CN203784727U CN 203784727 U CN203784727 U CN 203784727U CN 201320675608 U CN201320675608 U CN 201320675608U CN 203784727 U CN203784727 U CN 203784727U
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Abstract
The utility model provides an optical element and a lighting system comprising the optical element. The optical element comprises a bottom face used for mounting a light source, a first reflection face, a second reflection face, a third reflection face and a fourth reflection face, wherein the first refection face and the second reflection face are opposite, the third reflection face and the fourth reflection face are opposite, the first refection face and the second reflection face are not symmetrical, and the first reflection face, the third reflection face, the second reflection face and the fourth reflection face are sequentially connected to enable light which is secondarily distributed to be distributed in a shape similar to a rectangle. The lighting system further comprises a light hood, and reflection structures arranged on the inner surface of the top and the inner surface of the front portion of the light hood are used for distributing light from the optical element again. The optical element and the lighting system provide light distribution which is basically coincident with a reading area of a user, and optical utilization efficiency is improved.
Description
Technical field
The utility model relates to a kind of for the optical element of improved light utilization efficiency is provided.
The utility model also relates to a kind of optical system that comprises above-mentioned optical element and light source.
Background technology
Traditional desk lamp comprises the desk lamp of LED type and the desk lamp of non-LED type.These desk lamps can produce symmetrical circular light and distribute.The light producing is evenly distributed in hemisphere face space, thereby at the place ahead, the rear of lamp, has light to distribute.Yet user's reading area is normally between lamp and user, therefore, it is less that existing desk lamp is transmitted into the light ratio of target reading area, almost have half light to be dispersed to the rear of lamp, thereby the utilization rate of light is not high.
In addition,, when people's eyes and lamp are in equal height or when lower than lamp, the light that desk lamp produces can directly be injected in people's eyes, causes visually experiencing dazzle.When horizontal positioned desk lamp, high-high brightness point desk lamp below.If user wishes light to distribute and to adjust to reading area, near the own head that he need to move lamp holder, this can cause very uncomfortable reading to be experienced.Reader need to tilt lamp holder towards oneself, will cause so more light to be shot in in people's eyes, thereby produces the effect of dazzle.
Therefore, exist in the prior art the demand of the light utilization ratio of improving desk lamp.
Utility model content
In view of above-mentioned shortcoming of the prior art and problem, an object of the present utility model is the light utilization efficiency improving in target reading area.This is to realize by a kind of optical element with following setting.This optical element is the light from light source for secondary distribution, and it has for settling the bottom surface of light source, the first reflecting surface being oppositely arranged and the second reflecting surface, and the 3rd reflecting surface being oppositely arranged and the 4th reflecting surface.Wherein, the first reflecting surface and described the second reflecting surface are asymmetric, and the first reflecting surface, the 3rd reflecting surface, the second reflecting surface and the 4th reflecting surface order are connected between two so that the light of process secondary distribution produces approximate rectangular light distribution.Compare with desk lamp of the prior art, this approximate rectangular light distributes and overlaps with user's conventional reading area, is better than current circular reading area.Due to the distribution or asymmetrical distribution of the first reflecting surface and the second reflecting surface, more light can be assigned to a side of optical element, thereby avoid because part light is on average directed to the light efficiency losses that each orientation causes.
According to a preferred embodiment of the present utility model, the first reflecting surface, the second reflecting surface, the 3rd reflecting surface and the 4th reflecting surface are the plane of curved surface or a plurality of continuous bendings.According to the reflecting surface of this embodiment can be simply by means of curved surface and the Planar realization of bending continuously, do not need very complicated components and parts just can improve light utilization efficiency, therefore, simple and be easy to realization.
Preferably, the first reflecting surface reflects light to the second reflecting surface one side, the light reflecting on the base of the first reflecting surface becomes the first angle with bottom surface, the light reflecting at the top margin of the first reflecting surface becomes the second angle with bottom surface, so that the light being reflected is uniformly distributed between the first angle and the second angle.Preferably, the scope of the first angle is 75 ° to 90 °, and the scope of the second angle is 65 ° to 75 °.Those skilled in the art can understand, for simplicity, second angle is here defined as the angle that " in top margin and the bottom surface of the first reflecting surface " forms, in fact refer to light in this position the shooting angle with respect to bottom surface, that is the angle that, described light forms at the top edge of the first reflecting surface and bottom surface parallel surface by this top margin.Similarly, hereinafter, the angle forming in the top edge of each reflecting surface and bottom surface also all refers to the angle forming at the top edge of corresponding reflecting surface and bottom surface parallel surface by this top margin.
Preferably, the second reflecting surface is comprised of two parts, near the first of bottom surface, be used to light towards the second reflecting surface one lateral reflection, the light reflecting on the base of the second reflecting surface and bottom surface formation the 3rd angle and the light that reflected by described first are uniformly distributed in the scope of the 3rd angle to 90 °.Away from the second portion of bottom surface, be used to light towards the first reflecting surface one lateral reflection, the light reflecting at the top margin of the second reflecting surface becomes the 4th angle and in the scope of the 4th angle, is uniformly distributed at 90 ° by the light that described second portion reflected with bottom surface.Preferably, the scope of described the 3rd angle is 50 ° to 65 °, and the scope of the 4th angle is 60 ° to 70 °.The first reflecting surface and the second reflecting surface make reflected wide part concentrate on desk lamp under and the place ahead, and do not have light, be not reflected to desk lamp rear, thereby light reflection device compared to existing technology, has strengthened the light that is guided to target reading area greatly.
Preferably, the light energy being reflected by the first of described the second reflecting surface is greater than the light energy that the second portion by described the second reflecting surface reflects.According to the utility model of this embodiment, the light that the second reflecting surface reflects is mainly towards the direction of the second reflecting surface, and only has sub-fraction to deviate from the direction of described the second reflecting surface.The light distribution that has guaranteed like this this optical element has clearer and more definite dead line.
According to an embodiment of the present utility model, the third and fourth reflecting surface is respectively used to reflect light to symmetrically opposite side, light in the reflection of the place, base of described the third and fourth reflecting surface becomes the 5th angle with bottom surface, light in the reflection of the top margin place of described the third and fourth reflecting surface becomes hexagonal degree with bottom surface, and the light being reflected has and is uniformly distributed between the 5th angle and hexagonal degree.Preferably, the scope of the 5th angle is 75 ° to 85 °, and the scope of hexagonal degree is 40 ° to 50 °.
According on the other hand of the present utility model, also provide a kind of illuminator.This illuminator comprises aforesaid optical element and light source, and wherein said light source is arranged on the bottom surface of described optical element.This illuminator also comprises lampshade, and the bottom surface of described lampshade top inner surface and described optical element forms an established angle and the inner surface at lampshade top is provided with reflector, for reflecting the light being sent by optical element.Wherein, the light of the remote point from described light source to described first surface with perpendicular to the straight line of bottom surface, form the maximum angle of emergence and described established angle and be greater than the described maximum angle of emergence and 90 ° and subtract the 4th angle.Preferably, the scope of established angle is between 25 ° to 30 °.
This lampshade also comprises that lampshade is anterior.Lampshade front portion is provided with reflector with respect to the inner surface of lampshade top downward and lampshade front portion, for reflecting the light being sent by described optical element.
According to an embodiment, described LED array combines with functional shell, thereby, can when improving light utilization ratio, can also avoid light direct projection eyes.
Accompanying drawing explanation
In the accompanying drawings:
Fig. 1 illustrates according to the light of the desk lamp of prior art and distributes;
Fig. 2 A illustrates according to the array of optical elements of an embodiment of the utility model;
Fig. 2 B illustrates an optical element in the array of optical elements in Fig. 2 A;
Fig. 3 A illustrates according to the index path between the upper and lower reflecting surface of the optical element of an embodiment of the present utility model;
Fig. 3 B illustrates the index path between the reflecting surface of left and right according to the optical element of an embodiment of the present utility model;
Fig. 4 A illustrates according to the stereogram of the optical system of an embodiment of the present utility model;
Fig. 4 B illustrates the working state schematic representation of the optical system of Fig. 4 A;
Fig. 5 A illustrates the index path of the optical system of Fig. 4 A; And
Fig. 5 B illustrates the light distribution map of the optical system of Fig. 4 A.
The specific embodiment
Advantageous applications of the present utility model is interior lighting system.Hereinafter, will further with the example of the LED desk lamp for reading, the utility model be described, but the utility model is not limited to this application.At illumination control field, can replace described LED light source with various light sources.
Fig. 1 shows according to the light of the desk lamp of prior art and distributes.Square frame 100 in figure schematically shows the top view of desk lamp of the prior art.The light that this desk lamp produces is evenly distributed in all directions under lamp holder, maximum luminance point appear at desk lamp under, at the place ahead, the rear of lamp, have symmetrical light to distribute.Yet because user's reading area is normally between lamp and user, it is less that existing desk lamp is transmitted into the light ratio of target reading area, almost has the light of half to be dispersed to the rear of lamp, thereby cause the utilization rate of light not high.
Fig. 2 A illustrates according to the array of optical elements of an embodiment of the utility model.On the bottom surface of described element arrays 200, light source is installed, for example, LED light source.In the utility model, light source includes but not limited to have the LED of square light-emitting area, has square or the LED of circular luminous face and the LED of other types.Each LED light source is furnished with an independently asymmetrical reflector unit.Array of optical elements in Fig. 2 A has 10 asymmetrical reflector unit, but those skilled in the art are after having understood design of the present utility model, also can require to adopt more than or be less than 10 asymmetrical reflector cellular arraies according to concrete light output.For example, this depends on the heterogeneity of adopted light source, needed photodistributed concrete physical dimension etc.
Fig. 2 B illustrates a unit in the array of optical elements in Fig. 2 A.Described unit is connected between two by 4 reflectings surface and forms the reflection space of sealing.Upper reflecting surface 210 and lower reflecting surface 220 are positioned opposite to each other and be arranged to and have asymmetric catoptric arrangement, so that can not be reflected to the rear of upper reflecting surface via the light of this optical element guiding.Guaranteed so most of light producing from lamp holder be directed into LED lamp the place ahead and under.Left and right reflecting surface 230,240 has symmetrical setting.It is pointed out that the term using here, upper and lower, left and right are just for the spatial relationship in accompanying drawing 2A, and those skilled in the art can know that, in concrete realization, these spatial relationships can change along with the placement of this element.In a specific embodiment, upper reflecting surface, lower reflecting surface, left reflecting surface and right reflecting surface are curved surface.It will be understood by those skilled in the art that these reflectings surface also may be implemented as the plane with continuous bending.
Below with reference to Fig. 3 A and Fig. 3 B, specifically describe the facilities of each reflecting surface.Fig. 3 A illustrates according to the index path between the upper and lower reflecting surface of the optical element of an embodiment of the present utility model; Fig. 3 B illustrates the index path between the reflecting surface of left and right according to the optical element of an embodiment of the present utility model.
Upper reflecting surface 310 reflects downward reflecting surface 320 1 sides by light.Light in the reflection of the base of upper reflecting surface becomes the first reflection angle alpha with bottom surface
1, at the light of the top margin reflection of upper reflecting surface, become the second reflection angle alpha with bottom surface
2, and the light reflecting is uniformly distributed between the first angle of reflection and the second angle of reflection.The scope of the first angle of reflection is 75 ° to 90 °, and the scope of the second angle of reflection is 65 ° to 75 °.As shown in the figure, in the direction of upper reflecting surface, the light directly being penetrated by light source and be ε perpendicular to the maximum angle between the central shaft of bottom surface (being the maximum angle of emergence).
Lower reflecting surface 320 is comprised of two parts, and the 320a of first of close bottom surface is used to light towards lower reflecting surface 320 1 lateral reflections.By curve GI, represent first in the accompanying drawings.The light reflecting on the base of lower reflecting surface 320 and bottom surface form the 3rd angle [alpha]
3and the light being reflected by the described 320a of first is uniformly distributed in the scope of the 3rd angle to 90 °.
Lower reflecting surface 320 is used to light towards upper reflecting surface 310 1 lateral reflections away from the second portion 320b of bottom surface.By curve IH, represent second portion in the accompanying drawings.Intersection (the I point in the curve GIH) light reflecting and the parallel surface of bottom surface at first and second portion form an angle of 90 degrees.Reflection ray becomes the 4th angle [alpha] at the top margin of lower reflecting surface 320 with bottom surface
4, so that be uniformly distributed in the scope of the 4th angle at 90 ° by the light that described second portion reflected.Preferably, the scope of the 3rd angle is 50 ° to 65 °, and the scope of the 4th angle is 60 ° to 70 °.In utilization reflecting surface and lower reflecting surface can by the guiding of most of light and reflex to desk lamp under and the place ahead, and do not have light, be not distributed to desk lamp rear.When target area is during in desk lamp the place ahead, this has increased the light that is assigned to target area greatly, thereby has improved the light utilization ratio of light source.
According to an embodiment of the present utility model, lower reflecting surface 320 will reflex to most of light in the direction of lower reflecting surface.That is to say that the light ray energy of the GI of first that incides the lower surface of emission 320 is more than the light energy that incides the second portion IH of lower reflecting surface.For example, this can realize by adjusting the ratio of first and second portion, so that incide the angular range that the angular range of the light of first is greater than the light that incides second portion, that is, and ∠ GSI > ∠ ISG.According to this embodiment, the light that lower reflecting surface reflects is mainly towards the direction of lower reflecting surface, and the direction of only having sub-fraction to deviate from described lower reflecting surface is reflected to the opposite side of lower reflecting surface.The light distribution that has guaranteed like this this optical element has clearer and more definite dead line.
Fig. 3 B illustrates the index path between symmetrical reflecting surface according to the optical element of an embodiment of the present utility model.Left and right reflecting surface is respectively used to reflect light to symmetrically opposite side.The right reflecting surface of take below distributes and describes its light path as example, but those skilled in the art can be clear, also has symmetrical light path and distribute on left reflecting surface.The light being reflected by right reflecting surface is reflected in the direction of left reflecting surface.Light in the reflection of the place, base of right reflecting surface becomes the 5th angle [alpha] with bottom surface
5, at the light of its top margin place reflection, become the 6th angle [alpha] with bottom surface
6.The light being reflected has and is uniformly distributed between the 5th angle and hexagonal degree.Wherein, the scope of the 5th angle is 75 ° to 85 °, and the scope of hexagonal degree is 40 ° to 50 °.
It is to be noted that above what provide is only preferred embodiment of the present utility model, those skilled in the art can select different number ranges or concrete device based on aforesaid structure configuration according to above description.For example, according to light given in the utility model, distribute, also can consider to replace the first, second, third and the 4th reflecting surface with various elements.
Fig. 4 A illustrates according to the stereogram of the optical system of an embodiment of the present utility model.Fig. 4 B illustrates the working state schematic representation of the optical system of Fig. 4 A.This optical system is for example LED desk lamp.Only show in the accompanying drawings the cap part of desk lamp, it comprises aforementioned array of optical elements 200.This optical array is installed in lampshade 400.This lampshade has top 450 and with respect to the front portion 460 of lampshade top downward.At lampshade top, 450 and anterior 460 inner surface is provided with catoptric arrangement, for example, and plane mirror or be coated on the reflecting material on lampshade inner surface.
As shown in Figure 4 A, between the bottom surface of this optical array and the parallel surface at the top of lampshade 450, form established angle γ, thereby be launched on top mirror 450 and anterior speculum 460 from the light of optical array.Preferably, this established angle γ is greater than the angle ε shown in Fig. 3 A and (90 °-α
4).Guaranteed so not have light and be reflected to lampshade rear, thereby all light that penetrated by light source can be from the outgoing of desk lamp the place ahead, make light output quantity larger and and improved optical efficiency.As shown in Figure 3A, angle ε is at the direct light penetrating of top surface edge and perpendicular to the angle between the central shaft of bottom surface, and angle [alpha]
4the light that to be lower reflecting surface 320 reflect away from the second portion 320b of bottom surface is the angle with respect to bottom surface at the top margin of lower reflecting surface 320.Meanwhile, established angle γ is also unsuitable excessive, because along with the increase of γ, from the light of reflector, likely directly from the below of lampshade front portion 460, incides human eye.According to an embodiment of the present utility model, edge angle of emergence ε is in the scope of 20 ° to 25 °.Established angle γ is greater than the described edge angle of emergence, in the scope of 25 ° to 30 °.Distance between array of optical elements 200 and top 450 should be far away as much as possible.This is because along with the distance between the two reduces, and described reflector array will likely stop the light of 450 reflections from top, thereby affects light output efficiency.
On catoptric arrangement from the light of array of optical elements in top 450 and anterior 460, be reflected, be then projected onto target area, for example, target read area.Therefore, the inner surface of lampshade top 450 and front portion 460 has formed secondary souce.The distance increasing between array of optical elements and top 450 can reduce the light that direct projection enters eyes.But for attractive in appearance and minimizing cost, the thickness of lamp holder generally should not be too large.Therefore, between optical element and lampshade top, distance is also restricted.Generally speaking, lamp holder thickness is no more than 25 millimeters.
Catoptric arrangement on lampshade top 450 can increase light output in the size that keeps lamp holder.By the reflection in lampshade, the light that can improve target area distributes and uniformity.
Fig. 5 A illustrates the index path of the optical system of Fig. 4 A.The internal surface reflection via lampshade top 450 and lampshade front portion 460 from the light of optical element 200 in the drawings, and be directed into the front side of desk lamp.With respect to the desk lamp of prior art, most of light is distributed to target read area.In addition, because lampshade front portion is downward-sloping, its can prevent light from optical element by direct projection in people's eyes, therefore avoided the glare phenomenon of the desk lamp of prior art.The light distribution map of the optical system that Fig. 5 B illustrates Fig. 4 A on objective plane.Square frame in Fig. 5 B represents the projection of lamp holder on objective plane.Utilization is according to embodiment of the present utility model, and most of light is directed into lamp holder below and the place ahead.Distribute and compare with the light of the prior art shown in Fig. 1, according to desk lamp of the present utility model, be particularly suitable for providing illumination when carrying out work such as reading, writing.
Although according to specific embodiment, the utility model has been described, apparent, can adopt other form to realize the utility model by those skilled in the art.Above embodiment is only exemplary and nonrestrictive, and scope of the present utility model is limited by claims rather than above-mentioned explanation.Any Reference numeral in claim should be considered as to the restriction to claim scope.In addition, " comprise " that a word do not get rid of the existence of other elements.A plurality of parts of stating in claim also can be realized by parts.First, second etc. the ordinal number object for illustrating just, and do not represent any specific order.
Claims (10)
1. an optical element (200), the light for secondary distribution from light source, is characterized in that described optical element has:
For the bottom surface of settling light source;
The first reflecting surface (210,310) being oppositely arranged and the second reflecting surface (220,320), and
The 3rd reflecting surface (230,330) being oppositely arranged and the 4th reflecting surface (240,340),
Wherein, described the first reflecting surface and described the second reflecting surface are asymmetric, and the first reflecting surface, the 3rd reflecting surface, the second reflecting surface and the 4th reflecting surface order are connected between two so that the light of process secondary distribution produces approximate rectangular light distribution.
2. according to the optical element of claim 1, wherein the first reflecting surface, the second reflecting surface, the 3rd reflecting surface and the 4th reflecting surface are the plane of curved surface or a plurality of continuous bendings.
3. optical element according to claim 2, wherein the first reflecting surface reflects light to the second reflecting surface one side, the light reflecting on the base of the first reflecting surface becomes the first angle with bottom surface, the light reflecting at the top margin of the first reflecting surface becomes the second angle with bottom surface, and the light reflecting is uniformly distributed between the first angle and the second angle.
4. optical element according to claim 3, wherein, the second reflecting surface is comprised of two parts, first near bottom surface is used to light towards the second reflecting surface one lateral reflection, the light reflecting on the base of the second reflecting surface and bottom surface form the 3rd angle and the light that reflected by described first is uniformly distributed in the scope of the 3rd angle to 90 °, second portion away from bottom surface is used to light towards the first reflecting surface one lateral reflection, the light reflecting at the top margin of the second reflecting surface becomes the 4th angle with bottom surface and the light that reflected by described second portion is uniformly distributed in the scope of the 4th angle at 90 °.
5. optical element according to claim 4, wherein, the light energy being reflected by the first of described the second reflecting surface is greater than the light energy that the second portion by described the second reflecting surface reflects.
6. according to the optical element one of claim 1 to 5 Suo Shu, wherein, described the third and fourth reflecting surface is respectively used to reflect light to symmetrically opposite side, light in the reflection of the place, base of described the third and fourth reflecting surface becomes the 5th angle with bottom surface, light in the reflection of the top margin place of described the third and fourth reflecting surface becomes hexagonal degree with bottom surface, and the light being reflected has and is uniformly distributed between the 5th angle and hexagonal degree.
7. an illuminator, is characterized in that, described illuminator comprises:
According to the optical element (200) described in aforementioned arbitrary claim, and
Light source, wherein said light source is arranged on the bottom surface of described optical element.
8. illuminator according to claim 7, also comprises:
Lampshade, the top of described lampshade (450) form an established angle with the bottom surface of described optical element,
Wherein, the inner surface at lampshade top is provided with reflector, for reflecting the light being sent by described optical element,
Wherein, the light of the remote point from described light source to described first surface with perpendicular to the straight line of bottom surface, form the maximum angle of emergence (ε), and described established angle is greater than the described maximum angle of emergence and 90 ° and subtracts the 4th angle (90 °-δ 2).
9. according to the illuminator one of claim 7 to 8 Suo Shu, wherein said lampshade also comprises lampshade anterior (460), described lampshade front portion is provided with reflector with respect to the inner surface of lampshade top downward and lampshade front portion, for reflecting the light being sent by described optical element.
10. according to the illuminator one of claim 7 to 8 Suo Shu, wherein said light source comprises light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320675608.5U CN203784727U (en) | 2013-10-30 | 2013-10-30 | Optical element and lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320675608.5U CN203784727U (en) | 2013-10-30 | 2013-10-30 | Optical element and lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784727U true CN203784727U (en) | 2014-08-20 |
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ID=51320911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320675608.5U Expired - Fee Related CN203784727U (en) | 2013-10-30 | 2013-10-30 | Optical element and lighting system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203784727U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107076372A (en) * | 2014-09-19 | 2017-08-18 | 飞利浦灯具控股公司 | Desk lamp and for the method in the direction for adjusting the light output from desk lamp |
| TWI608193B (en) * | 2016-10-05 | 2017-12-11 | Opto Tech Corp | Reflective light emitting device |
| CN109668111A (en) * | 2019-02-14 | 2019-04-23 | 华域视觉科技(上海)有限公司 | Automobile-used dipped headlight and automobile comprising it |
-
2013
- 2013-10-30 CN CN201320675608.5U patent/CN203784727U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107076372A (en) * | 2014-09-19 | 2017-08-18 | 飞利浦灯具控股公司 | Desk lamp and for the method in the direction for adjusting the light output from desk lamp |
| TWI608193B (en) * | 2016-10-05 | 2017-12-11 | Opto Tech Corp | Reflective light emitting device |
| CN109668111A (en) * | 2019-02-14 | 2019-04-23 | 华域视觉科技(上海)有限公司 | Automobile-used dipped headlight and automobile comprising it |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20211030 |