CN2876546Y

CN2876546Y - Light guiding plate

Info

Publication number: CN2876546Y
Application number: CN 200520104063
Authority: CN
Inventors: 付刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-18
Filing date: 2005-08-18
Publication date: 2007-03-07
Anticipated expiration: 2015-08-18

Abstract

A light-guiding plate with a hole in the center of the cycle, comprises an incidence surface, a flat light conductor and a sending out surface. The incidence surface is near the cycle center and the sending out surface is in the outer cycle. The light-guiding plate can conduct the incidence lights into the sending out surface of large area cooperating with the dot-shaped luminophor and send the lights out. The utility model can form a lighting unit with high brightness combined with a plurality of LEDs, increasing the emitting effect of LED lights and lowering the energy density, improving the effect of heat releasing. The light-guiding plate can form a lamelliform lighting unit combined with a LED with high brightness and a relative circuit structure. Piled and combined with the lighting unit and cooperated with the standard illuminating elements, a LED lamp with high brightness can be produced for a plurality of illuminating purposes with a plurality of advantages such as: simple structure, multiple change, good compatibility, beautiful appearance, safety and reliability, low cost and convenient usage.

Description

LGP

Technical field:

The utility model relates to a kind of light guide member, particularly cooperate novel point source of light such as light emitting diode (LED) LGP as the new type light source of light-emitting component, the light that uses the utility model point source of light can be sent conducts to specific direction, make light efficiently arrive the edge and spread to the space, also can change the direction of propagation of light through diffusing structure, be converted into linear light and plane and sphere light source thereby spot light is converted to, thereby eliminate the dazzling light of spot light; LGP cooperates light emitting diode (LED) device of some capable of being combined or be assembled into the light emitting module of standard, and LGP can constitute the shell of illuminator simultaneously.Use polylith LGP and the light emitting module unit that light emitting diode constitutes, can constitute power change free, brightness is high, energy-efficient, safe and reliable, it is simple to make, compatibility is good, the novel light-emitting diode illuminator of long service life.

Background technology:

LGP is the optics that light is transmitted to ad-hoc location or direction, used the planar optical waveguide principle, can light transmission, refraction, the reflection of LGP inside will be entered, when light is propagated in the optical conductor of portion within it, remove direct projection, on two relative interface, total reflection take place simultaneously, because of loss minimum, can efficiently be delivered to other end face, and finally derive from outgoing plane.Also can change part light into planar light by means of the diffusing structure that is distributed in the surface.General use the material transparent manufacturing, as glass, transparent resin material manufacturing.China national Department of Intellectual Property application number is that 200410027387.6 patent has proposed a kind of LED light lamp, the LED light lamp that this patent proposes not only comprises light emitting diode, also comprise a kind of LGP, utilize LGP that the light that light emitting diode (LED) sends is efficiently derived, not only utilized the planar light of its LGP, also utilized the ejaculation light at its edge, spot light is spread, can human eye not damaged, realized a kind of environmental protection that can directly replace the conventional lamp use because of the glare effect of spot light, safety, energy-conservation, the new type light source that life-span is long.

Existing LED light lamp uses light emitting diode to be installed on the single circuit substrate on plane to constitute mostly, because the luminance shortage of single light emitting diode must be used a plurality of combination of devices to satisfy the needs of highlight illumination.But because the size of the light fixture of practical application is limited, also be restricted so the quantity of light emitting diode is installed, the brightness of lamp can't effectively be improved, and its development and application also is greatly limited.

LGP of the present utility model can make light that spot light such as light emitting diode sends directly to specific direction efficient propagation diffusion, avoids by circuit substrate or the reflection of other structures or absorb causing loss, has improved the luminous efficiency of light source; Thoroughly changed simultaneously the installation restriction of luminescent device, can unconfined stacked installation.The utility model can make the light of luminescent device emission effectively outwards propagate even change direction, not blocked by the circuit installation influence; The laminar luminescence unit that the utility model and light emitting diode formation thickness capable of being combined is minimum uses this kind unit to be combined into easily to have that appearance and size is little, the uniform LED light lamp of surface light emitting.Owing to there is not the restriction of structure, the quantity of use unit can be infinitely many, can conveniently constitute the LED light lamp of various power.

The utility model has carried out innovation, expansion and additional to the structural shape of the LGP in original patent content.Use LGP described in the utility model can realize that more high efficiency photoconduction goes out, can improve radiating condition simultaneously, improve the uniformity of light diffusion, can adopt more multi-form light source device, further strengthened practicality.

Summary of the invention:

The problem that the utility model solves has been to propose a kind of LGP that is used to construct the practicality of LED lamp, LGP is a circular discoid, LGP is by the incident end, planar light conductor and outgoing plane are formed, it is characterized in that the plane of light incidence of LGP is positioned near the position in center or center of LGP, the light that luminescent device such as LED send enters planar light conductor through the plane of incidence, direct projection and total reflection in optical conductor, conduct to outgoing plane, directly or through scattering penetrate to the space, the light that a plurality of LED spot lights send overlaps in the LGP inscattering and makes light be uniformly distributed in the outgoing plane of LGP again.

Plant LGP and the circuit board that a plurality of LED are installed thus and be assembled into the luminescence unit of standard, can mutual stacked assembling, cooperate power-switching circuit and radiator structure, can constitute that surperficial uniformly light-emitting, illumination are enough, the Novel LED light of the practicality that can use safely.

The incident end of LGP can be made special construction smooth or that more help light incident by the application requirements of reality, as point-like, zigzag or groove class formation.

The planar-light guide part of LGP is designed to help the gauge that light is propagated according to the application requirements of reality, and its outer surface is parallel surface, or inclined-plane at an angle; Can be smooth also can be manufactured with diffusing structure or reflecting layer, this structure be point-like or groove class formation; Also can be external reflecting layer or coating.

The outward flange of LGP is the ejaculation edge of light, and this edge can be the surface of cylindricality, also can be the bigger arc curve surface of angle of flare degree; Its surface can be smooth, also can be the rule or the irregular diffusing structure that can make the light scattering.

The prominent shape structure of the surface of LGP can also help and circuit structure, radiator structure and LGP cooperatively interact assembling and sealing.

Have one or more through holes near the center of LGP or the center, this hole can be at the passage as electrical connection arrangement and heat abstractor or radiating airflow.This hole can be circular, square or polygon.

Description of drawings

Below in conjunction with accompanying drawing this utility model is further detailed, in the accompanying drawing:

Fig. 1-the 1st, basic structure of the present utility model plane external form figure.

Fig. 1-2 is the longitudinal section view of basic structure of the present utility model.

Fig. 2-the 1st, the schematic diagram that outer rim of the present utility model is curved.

Fig. 2-the 2nd, outgoing plane are the schematic cross-section of tapered slope.

Fig. 3-the 1st, a kind of schematic diagram of the present utility model with LGP of fit structure.

Fig. 3-the 2nd, the planar light conductor of LGP of the present utility model and outgoing plane are mild transitional structure schematic diagram.

Fig. 4 is the schematic diagram of the structure of a kind of outer surface of the present utility model variation of being manufactured with scattering layer.

Fig. 5 is the structural representation that two surfaces of the present utility model are manufactured with the total emission layer.

Fig. 6 is the structural representation that the utility model has a plurality of louvres.

The specific embodiment:

Fig. 1-2 is the longitudinal section view of basic structure of the present utility model, and wherein 11 is the plane of incidence of light source, and 12 is planar light conductor, and 13 is the light outgoing plane, and 15 is the circuit assembly structure, and 16 is the fitting tight structure of LGP.Wherein the plane of incidence 11 is positioned near the center of circle of LGP, and it is vertical with the plane of the planar light conductor 12 of LGP, the light that point source of light 15 sends enters planar light conductor 12 through the plane of incidence 11, between two surfaces that are parallel to each other of optical conductor, reflect, propagate to outer peripheral light outgoing plane 13 through optical conductor, and penetrate to the space by outgoing plane 13.The route schematic diagram that light is propagated has also drawn among the figure.

Fig. 2-the 1st, the situation on the outward flange 23 curved surfaces of LGP, the light that LED 21 sends enters optical conductor 22, penetrates through this curved surfaces 23, and its angle of radiation changes, and can improve light output efficiency, also can improve illuminance uniformity.

Fig. 2-the 2nd, outgoing plane are the schematic cross-section of tapered slope.The light that LED 21 sends among the figure penetrates through conical surface 24, and light can be penetrated to specific direction, can strengthen the luminous intensity of specific region.

The planar light conductor of Fig. 3-1 LGP and outgoing plane are mild transitional structure, and this structure makes more effective being mapped to of the light in the optical conductor penetrate the surface, and helps improving processability.

Fig. 3-the 2nd, a kind of schematic diagram of the present utility model with LGP of fit structure, the raised structures 35 that it had has formed the mating surface with other LGP simultaneously, can cooperate with the groove structure 36 of other unit, form the practical product of the safety of sealing.

Fig. 3-the 3rd is a kind of stacked fit structure of LGP, as shown in the figure, the structure 61 that projection is arranged at the one surface edge, at another surperficial relative position recessed structure 62 is arranged then, two identical LGPs are after stacked, 61,62 structures of different LGPs cooperatively interact, and help forming the hermetically-sealed construction that is easy to assemble and help waterproof.

Fig. 4 is the structure of a kind of variation of the present utility model, wherein optical conductor outer surface is manufactured with scattering layer 41, the plane of incidence of light is manufactured with and helps the point-like that light injects or the incident absorbed layer 42 of strip, the scattering layer 43 that also has light at LGP light ejecting end, help reducing the reflection of light, improve the light propagation efficiency at the interface.When light was propagated in planar light conductor, a part wherein penetrated to vertical direction through the scattering of diffusing structure 41, also can obtain the better illumination effect in vertical direction.Catoptric arrangement 41 can be distributed in the outer surface of whole planar light conductor, also can be distributed in the part.Scattering layer 41 can be to be the point-like of distribution in the center of circle or the microstructure of groove shape with the LGP geometric center.Can be formed by the method for injection mo(u)lding, also can be to wait other method to form by the burn into printing.

Fig. 5 has total reflection layer 51 and 52 for two outer surfaces at optical conductor, propagate in planar light conductor from the light that light source 53 sends, the light of nearly all incident angle can be propagated in the mode of total reflection between two reflecting surfaces of planar light conductor, penetrate from ejecting end at last, make the propagation efficiency of light higher.Reflecting layer 51,51 can be to form coating on the surface of light conductor with method for processing, also can be by the reflective film that independently is attached at the light conductor surface.

Fig. 6 is for having the schematic diagram of a plurality of waist through hole on LGP.On LGP, except that centre bore 62, also have a plurality of through holes 61, the hole sidewall can form the light reflecting surface.By the passage that the stacked back of a plurality of LGPs forms, can form the passage that gas circulation flows, join and other heat abstractor, effectively outwards conduction of the heat that the LED device can be produced, thus improve radiating condition, the life-span and the stability of raising LED lamp.Through hole 62 can be one or more, and its shape can be rectangle, fan-shaped, waist shape, circle, ellipse or shaped form.

Claims

1, a kind of LGP comprises the outgoing plane of the plane of incidence, planar light conductor and the light of light it is characterized in that it is shaped as circle that the incident end of light is positioned near position circular geometric center or the center.

2, LGP according to claim 1 is characterized in that the plane of incidence of described LGP can be smooth surface, also can have the microstructure of sawtooth, groove class or point-like.

3, LGP according to claim 1 is characterized in that the cross section of outgoing plane can be perpendicular to the straight of planar light conductor, also can be oblique line and the arc curve with function feature.

4, LGP according to claim 3 is characterized in that penetrating the surface and can be the cross section with planar-light guide body section same size, also surface that can be big than the planar-light guide body section.

5, LGP according to claim 4, the outer surface that it is characterized in that outgoing plane can be smooth, also can be to have diffusing structure, this diffusing structure can be the point-like of regular arrangement or the microstructure of wire, also can be the structure of random distribution.

6, LGP according to claim 5, it is characterized in that the outer surface at planar light conductor can be a smooth surface, also can be the rough surface that is distributed with the diffusing structure of microcosmic, a surface that can be therein also can be on two relative surfaces.

7, LGP according to claim 6, the outer surface that it is characterized in that planar light conductor can have the reflectance coating of reflection ray, and reflectance coating can be external, also can be plated in the surface.

8, LGP according to claim 7 is characterized in that described diffusing structure can be distributed in whole surface, also can be distributed in the regional area on surface as required.

9, LGP according to claim 8 is characterized in that its making material can use glass, also can be resin and plastic.

10, LGP according to claim 9 is characterized in that and can have the hole at center and other non-light path position; The quantity in hole can be one and a plurality of, and the shape in hole can be circular, oval, square, trapezoidal and polygon.