CN101943340A - Illumination device - Google Patents

Abstract

The invention discloses an illumination device. The illumination device comprises a light guiding member and a light source module, wherein the light guiding member is provided with an annular incident light surface which is arranged in the light guiding member; the light source module comprises a plurality of light-emitting components, and each light-emitting component faces the incident light surface and can emit light rays to enter the light guiding member from the incident light surface; the light guiding member can be a light guiding plate with a through hole, and the side wall of the through hole is used as the incident light surface; and the light source module can use an annular circuit board arranged in the through hole, and the plurality of light-emitting components are arranged on the outer ring surface of the annular circuit board and face the side wall. Therefore, the illumination device can provide the illumination of radial light guiding.

Description

Lighting device

Technical field

The present invention refers to a kind of lighting device that radial leaded light illumination can be provided especially about a kind of lighting device.

Background technology

Along with the exploitation of various light sources, (light-emitting diode LED) is applied to the field of throwing light on because of the lifting of power to light-emittingdiode gradually.The LED lighting device of single point light source is limited and unsuitable as the illumination of reading usefulness except its illumination and illumination zone, and the bright spot that spot light causes also makes user's eyes susceptible to uncomfortable.For increasing the whole illumination of lighting device, adopt a plurality of high-capacity LEDs more, and utilize lampshade in addition with softening light moderately with planar alignment, relax the perverse eye sense of spot light.Though this structure can promote illumination and enlarge illumination zone, the uniformity of its illumination is still not enough.

Other has with leaded light post or LGP as light mixing mechanism so that the device than uniform surface light source to be provided, and the plurality of points light source of this device is arranged at the avris of LGP, and light penetrates out this LGP via the surface again after this avris enters this LGP.But the intensity of the light that penetrates out be inversely proportional to the distance of this avris, so the intensity of the area source of this LGP generation still has graded.For increasing uniformity, this plurality of points light source can be arranged at the two relative avris of this LGP, slows down the gradient of the Strength Changes of this area source by this; Yet this structure only can be used for the LGP of symmetrical structure usually, especially has the avris that is parallel to each other, and rectangle for example so that this installs available illuminated field shape is limited, has also limited its practicality.

Have again to form a plurality of holes on LGP, a LED is set in each hole, the light of this LED emission promptly enters in this LGP from this hole inwall certainly.Distribution by those holes of design and reflecting slant can obtain required illuminated field shape.Yet this structure will make the easily too huge and unfavorable maintenance of circuit structure, and when LED power is big, also unfavorable to the design of radiator structure; In addition, at the LGP of different size, aforementioned every structure all needs otherwise designed, very is unfavorable for product design, manufacturing.

Summary of the invention

One of purpose of the present invention is to provide a kind of lighting device, and the illumination of radial leaded light can be provided.

According to an embodiment, lighting device of the present invention comprises light conducting member and light source module.This light conducting member has incidence surface, and this incidence surface is circumferentia and is arranged at this light conducting member inside.This light source module comprises a plurality of light-emitting components, and each light-emitting component also can be launched light towards this incidence surface setting and enter in this light conducting member from this incidence surface.By this, those light-emitting components are arranged in ring-type, and the light of this light-emitting component emission enters radially and navigates in this light conducting member certainly, so the profile of this light conducting member will no longer be confined to rectangle, and its illuminated field shape that can produce also can be diversified.

Further, this light source module also comprises annular circuit board and radiating component.Annular circuit board has inner ring surface and outer ring surface, and these a plurality of light-emitting components are arranged at this outer ring surface; Radiating component is arranged at this inner ring surface.

Further, this radiating component also comprises perforate, heat-dissipating casing and a plurality of ring-type fin, and perforate is in order to engage with bracing frame, and this bracing frame is in order to prop up this lighting device; Heat-dissipating casing is arranged at the top of this light conducting member, in order to the heat of this radiating component is discharged by the top.

Further, this light conducting member has exiting surface, uses for this light that enters this light conducting member and passes, and this exiting surface is vertical with this incidence surface.

Further, this light conducting member has with respect to the surface of this exiting surface and comprises catoptric arrangement on this surface, and this catoptric arrangement reflection enters this light of this light conducting member.

Further, this catoptric arrangement comprises and is formed at a plurality of of this surface and has the concave point on inclined-plane or coat this lip-deep a plurality of pips.

Further, near the distribution density of this concave point of this light source module or this pip less than away from this concave point of this light source module or the distribution density of this pip; Perhaps, near the some footpath of this concave point of this light source module or this pip less than some footpath away from this concave point or this pip of this light source module.

Further, this light conducting member is sheet material and has outer rim, and this light-emitting component is linear annular arrangement and to should the incidence surface setting, the distribution density of this light-emitting component be proportional to from this light-emitting component to should incidence surface to should outside intermarginal distance.

According to another embodiment, lighting device of the present invention comprises LGP and annular circuit board.This LGP has perforation, and this perforation has sidewall.This annular circuit board is arranged in this perforation and this annular circuit board has inner ring surface and outer ring surface, and a plurality of light-emitting components are arranged at this outer ring surface and to this sidewall.Similarly, the light of this light-emitting component emission enters radially and navigates in this light conducting member certainly, and therefore lighting device of the present invention can produce diversified illuminated field shape.

Further, this lighting device also comprises radiating component, and this radiating component couples this inner ring surface.

Further, this LGP also comprise first with relative second, this first is provided with bevelled concave point or coats a plurality of pips on this first surface, when a plurality of light-emitting components are launched light, this light enters this LGP via this sidewall, and this light penetrates out this LGP by the concave point on this first or the reflection of a plurality of pips by this second face.

Compared to prior art, lighting device of the present invention utilizes the light-emitting component of annular arrangement to produce radial light guide structure, further by the arranging density of control light-emitting component and the reflection light quantity of catoptric arrangement, to reach the purpose of even bright dipping easily, even if light conducting member is irregular contour, also can effectively improve the uniformity of light conducting member bright dipping.

Can be about the advantages and spirit of the present invention by following detailed Description Of The Invention and appended graphic being further understood.

Description of drawings

Fig. 1 is the schematic diagram of lighting device according to a preferred embodiment of the present invention;

Fig. 2 is the profile of Fig. 1 along the X-X line;

Fig. 3 is the profile according to the lighting device of another embodiment;

Fig. 4 is the profile according to the lighting device of another embodiment.

The specific embodiment

See also Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram oflighting device 1 according to a preferred embodiment of the present invention, and Fig. 2 is the profile of Fig. 1 along the X-Xline.Lighting device 1 comprises light conductingmember 12,light source module 14 and radiating component 16.In present embodiment, light conductingmember 12 is a LGP, and it hasperforation 122, andperforation 122 has sidewall, as theincidence surface 124 oflight conducting member 12, soincidence surface 124 is arranged at the inside oflight conducting member 12 and is circumferentia.Light source module 14 comprisesannular circuit board 142 and a plurality of light-emitting component 144,annular circuit board 142 is arranged in theperforation 122 and comprises inner ring surface 1422 and outer ring surface 1424, light-emitting component 144 is arranged on the outer ring surface 1424 and towards this sidewall (being incidence surface 124), the light of launching self-emission device 144 by this can enter in thelight conducting member 12 and propagation radially from incidence surface 124.Radiating component 16 couples inner ring surface 1422, to absorb the heat that light-emittingcomponent 144 is produced via contact inner ring surface 1422 in running.

Light conductingmember 12 comprises first 126 and with respect to first 126second 128, the first 126 bevelledconcave point 1262 is set.Therefore when a plurality of light-emitting components 144 are launched light, this light enterslight conducting member 12 via incidence surface 124 (being arranged on this sidewall), the light that enterslight conducting member 12 penetrates outlight conducting member 12 by the reflection of theconcave point 1262 on first 126 (inclined-plane) by second 128 again, and its reflection path is represented by dotted lines; The light majority that enterslight conducting member 12 penetrates by second 128 because of ray refraction or scattering, yet still has part light to be penetrated by outer rim 130.In present embodiment, second 128 promptly as the main exiting surface oflight conducting member 12, and this exiting surface is vertical with incidence surface 124.In addition, go up with respect to the surface (promptly first 126) of second 128 (this exiting surface) and to form the catoptric arrangement that is made of thoseconcave points 1262, reflecting this light that enters this light conducting member, but the present invention is not as limit.See also Fig. 3, it is the profile according to thelighting device 1 of another embodiment.Catoptric arrangement is made of coating (for example printing) a plurality ofpips 1263 on first 126 among Fig. 3, thosepips 1263 also can reflect enterlight conducting member 12 light to pass second 128.

See also Fig. 1, in present embodiment, because of light is to propagate inlight conducting member 12 with radial, so arrive from the heal light ray energy of local assigned unit are far away of light-emitting component 144 lower, light travel distance inlight conducting member 12 is longer again, then the chance that is reflected by this catoptric arrangement the more, so can arrive from the heal light ray energy in place far away of light-emitting component 144 also lower, under aforementioned dual influence, desire to reach the evenly bright dipping of exiting surface (promptly second 128) oflight conducting member 12, the distribution density of aforementionedconcave point 1262 orpip 1263 need be adjusted.In principle near the distribution density of theconcave point 1262 oflight source module 14 orpip 1263 less than distribution density away from theconcave point 1262 or thepip 1263 of light source module 14.Aforementioned eachconcave point 1262 or thepip 1263 of being based on all has identical some footpath, in practical application, directly replaces the adjustment of aforementioned distribution density with the point of theconcave point 1262 that changes zones of different orpip 1263, can reach the requirement of aforementioned even bright dipping equally; In this situation, in principle near the some footpath of theconcave point 1262 oflight source module 14 orpip 1263 less than some footpath away from theconcave point 1262 or thepip 1263 oflight source module 14.

In addition,light conducting member 12 is a sheet material and substantially oblong-shaped, thecorresponding incidence surface 124 of light-emitting component 144 linear annular arrangements is provided with, significantly, the path that the light that emits from each light-emitting component 144 needs to propagate inlight conducting member 12 differs, have the problem of the light ray energy decline of aforementioned unit are equally, therefore, in present embodiment, can make the distribution density of light-emitting component 144 be proportional to thedistance 132 of self-emission device 144corresponding incidence surfaces 124, to reach the purpose that the light ray energy of slowing down aforementioned unit are descends to 130 of the outer rims oflight conducting member 12.

In addition, aforementionedannular circuit board 142 can be flexible circuit board, light-emitting component 144 through flexible circuit board thus as being electrically connected media, but in practical application, light-emitting component 144 also be attached at one by one on theradiating component 16, its electrical connection can be in addition otherwise for it, for example backguy or connect separately with flexible circuit board respectively separately, can reduce the thermal resistance of 16 of light-emitting component 144 and radiating components by this, when light-emitting component 144 power increase, more see its real benefit.

See also Fig. 1 and Fig. 2,radiating component 16 comprisesbody 162 and is arranged at a plurality of ring-type fins 164 on thebody 162, utilizes ring-type fin 164 to increase the radiating efficiency of radiating component 16.In addition, form perforate 166 on thebody 162, bracing frame 18 (being illustrated among Fig. 2 with dotted line) can engage with perforate 166, to prop uplighting device 1.

See also Fig. 4, it is the profile according to thelighting device 1 of another embodiment.For further increasing the radiating efficiency of radiatingcomponent 16 again, radiatingcomponent 16 can comprise heat-dissipatingcasing 168 again, connectsbody 162 and is arranged at the top oflight conducting member 12, in order to the heat of radiatingcomponent 16 is discharged by the top.This heat-dissipatingcasing 168 directly shell of integratingillumination device 1 is integrated design.

Compared to prior art, lighting device of the present invention utilizes the light-emitting component of annular arrangement to produce radial light guide structure, and can be by the arranging density of control light-emitting component and the reflection light quantity of catoptric arrangement, to reach the purpose of even bright dipping easily, overcome the problem of single-point light source light field luminance inequality in the prior art; And, even if light conducting member is irregular contour, lighting device of the present invention also can be based on the explanation of previous embodiment, promptly adjust the arranging density of suitable light-emitting component and the geometric properties of catoptric arrangement (for example distribution density, some footpath etc.), can effectively improve the uniformity of light conducting member bright dipping not changing too many design parameter, overcome in the prior art because of the light conducting member profile changes and cause light-emitting component to distribute and the catoptric arrangement size needs the problem of change significantly.In addition, the radiating component of lighting device of the present invention is arranged at the light conducting member middle part, has the support structure function concurrently, can reduce the lighting device overall volume.

The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.

Claims (11)

1. lighting device is characterized in that this lighting device comprises:

Light conducting member has incidence surface, and this incidence surface is circumferentia and is arranged at this light conducting member inside; And

The light source module comprises a plurality of light-emitting components, and each light-emitting component enters in this light conducting member from this incidence surface towards this incidence surface setting and emission light.

2. lighting device as claimed in claim 1 is characterized in that this light source module also comprises:

Annular circuit board has inner ring surface and outer ring surface, and these a plurality of light-emitting components are arranged at this outer ring surface; And

Radiating component is arranged at this inner ring surface.

3. lighting device as claimed in claim 2 is characterized in that this radiating component also comprises:

Perforate, in order to engage with bracing frame, this bracing frame is in order to prop up this lighting device;

Heat-dissipating casing is arranged at the top of this light conducting member, in order to the heat of this radiating component is discharged by the top; And

A plurality of ring-type fins.

4. lighting device as claimed in claim 1 is characterized in that this light conducting member has exiting surface, uses for this light that enters this light conducting member and passes, and this exiting surface is vertical with this incidence surface.

5. lighting device as claimed in claim 4, it is characterized in that this light conducting member have with respect to this exiting surface the surface and comprise catoptric arrangement on this surface, this catoptric arrangement enters this light of this light conducting member in order to reflection.

6. lighting device as claimed in claim 5 is characterized in that this catoptric arrangement comprises to be formed at a plurality of of this surface and to have the concave point on inclined-plane or coat this lip-deep a plurality of pips.

7. lighting device as claimed in claim 6 is characterized in that near the distribution density of this concave point of this light source module or this pip less than away from this concave point of this light source module or the distribution density of this pip; Perhaps, near the some footpath of this concave point of this light source module or this pip less than some footpath away from this concave point or this pip of this light source module.

8. lighting device as claimed in claim 1, it is characterized in that this light conducting member is sheet material and has outer rim, this light-emitting component is linear annular arrangement and to should the incidence surface setting, the distribution density of this light-emitting component be proportional to from this light-emitting component to should incidence surface to should outside intermarginal distance.

9. lighting device is characterized in that this lighting device comprises:

LGP, this LGP has perforation, and this perforation has sidewall; And

Annular circuit board is arranged in this perforation, and this annular circuit board has inner ring surface and outer ring surface, and a plurality of light-emitting components are arranged at this outer ring surface and towards this sidewall.

10. lighting device as claimed in claim 9 is characterized in that this lighting device also comprises radiating component, and this radiating component couples this inner ring surface.

11. lighting device as claimed in claim 9, it is characterized in that this LGP also comprise first with relative second, this first is provided with bevelled concave point or coats a plurality of pips on this first surface, when a plurality of light-emitting components are launched light, this light enters this LGP via this sidewall, and this light penetrates out this LGP by the concave point on this first or the reflection of a plurality of pips by this second face.

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