CN100582559C - Light emitting device capable of adjusting light emitting angle - Google Patents

Abstract

The invention relates to a light-emitting device capable of adjusting a light-emitting angle, which comprises at least one directional light source, a control circuit and a control circuit, wherein the directional light source is electrically conducted with the control circuit to emit light; the light guide cover is provided with the directional light source arranged inside, and a light control microstructure is arranged in the light guide cover and consists of a plurality of microstructure surfaces with refraction or reflection characteristics; by adjusting the light projection angle of the light emitted by the directional light source, the light can be projected to different microstructure surfaces on the light control microstructure, so that the light emitting angle of the light guide cover is changed.

Description

Lighting device with adjustable light output angle

technical field

The present invention relates to a light-emitting device capable of adjusting the light-emitting angle, in particular to a light-emitting device that uses a light-emitting diode as a light source and cooperates with a light-controlling microstructure light guide cover. By adjusting the light-emitting angle of the light-emitting diode, the light output of the light-emitting device can be changed. A light-emitting device with an adjustable light-emitting angle.

Background technique

Traditional light sources can be divided into two types: point light sources and line light sources. Tungsten filament lamps and energy-saving bulbs are point light sources, while fluorescent tubes are line light sources. When the above two light sources emit light, they emit light in a radial manner. Therefore, it is impossible to adjust the projection angle of the light source.

In recent years, light-emitting diodes (LEDs, Light Emitting Diodes), which have been gradually applied to lighting fixtures, are planar light sources (or directional light sources). Although light-emitting diodes have the advantage of small size, they have many disadvantages when applied to lighting fixtures:

1. The angle of light projection is limited, so it is not suitable for traditional lamps, and it must be used with a reflective or direct structure cover to emit light;

2. The brightness of a single light-emitting diode cannot meet the needs of lamps. Multiple light-emitting diodes with fixed projection angles must be used to emit light to provide sufficient brightness, resulting in uneven light, glare and limited light-emitting range of direct-lit lamps with fixed projection angles. and other issues, causing discomfort to the viewers;

3. The light projection angle of the light emitting diode light source is fixed, so it is difficult to adjust different light emission angles and light patterns for different light or needs for refracting or reflective lamps with fixed light projection angles, which is less flexible in use;

4. In traditional LED lamps, since the LEDs are fixed on the circuit board, if you need to replace or repair a single LED light source, or change the type of LED configuration, you must disassemble and replace it together with the circuit board. The maintenance method is quite Difficulty, it is difficult for ordinary consumers to replace or repair by themselves.

5. If a single or part of the light-emitting diodes is damaged, it will be observed immediately.

For patents, please refer to FIG. 1, US Patent No. 6315432 Light-emitting diode (LED) device, this case discloses a light-emitting diode device, which is to arrange the light-emitting diode 10 in a sphere 110, the light-emitting diode 10 The head that can emit light penetrates the outside of the sphere 110, and then the sphere 110 is embedded in a seat 12 that can match the outer diameter of the sphere 110, and the sphere 110 is pivoted in the seat 12 Turn, the light projection angle of the light emitting diode 10 can be adjusted. When the above structure is applied to an electronic device that cooperates with the photodetector 3, since the light emitting diode 10 can adjust the light projection angle, the light emitting diode 10 and the light detector 3 The position and angle A of this case have design flexibility; the structure of this case is complex and huge, and assembly and maintenance are not easy, and the light projection angle of the light emitting diode is limited to the side of the base body 12 facing the photodetector 3, which cannot be fully realized. Furthermore, the light-emitting diodes in this case directly emit light to cooperate with the photodetector without revealing any matching reflectors. If this structure is applied to ordinary lamps, it still cannot solve the problem of uneven light, glare and luminescence. issues such as limited scope.

Please refer to Fig. 2 again, the U.S. Patent No. 6,450,663 Light-emitting-diode arrangement, which discloses a signal lamp for vehicles, which is arranged with a plurality of light-emitting diodes 3 on a substrate 19, and the light-emitting diodes 3 The rear leg 22 is welded and fixed on the support plate 19, and the front leg 16 is passed through the hole 14 of the base plate 19. By bending the rear leg 22, the projection angle 6 of the LED 3 can be tilted as required. Although the light-emitting diode 3 is in a unilaterally adjustable state, the disadvantage is that the fixed rear foot 22 cannot cope with repeated bending, otherwise it is easy to break. Furthermore, the adjustment range of the light-emitting diode 3 is limited to the The surface of the substrate 19 and the hole 14 are similar. The light-emitting diodes in this case emit light directly without any matching refraction or reflection cover. If this structure is applied to a general lamp, it still cannot solve the problem of uneven light, glare and Problems such as limited luminous range.

It can be known from the above-mentioned two patents that due to the limitation of the structure of the traditional double-leg LED, there are problems such as that the light projection angle cannot be adjusted randomly, and the failure of a single LED is difficult to repair. Tube-shaped light-emitting diodes are similar in shape to traditional glass tube fuses. The feature is that the light-emitting diodes can be illuminated by being embedded in a conductive seat, which is convenient for maintenance and replacement. Currently, it can be seen in dome lights used in automobiles.

After retrieval and the aforementioned patents related to the light-emitting diodes with glass tubes, please refer to Figure 3A and Figure 3B, Japanese Invention Patent Laid-Open No. 2002324405 LED revolving light-emitting lamp, the light-emitting lamp 1B is provided with a substrate in a cylindrical transparent body 4 16. A plurality of light emitting diodes 3 are arranged on the substrate 16 around the axis of the body 4, and an electrode 5 is provided at each axial end of the body 4, and the electrode 5 can be clamped in the terminal 10 with an opening 11 on the top , so that the light-emitting diode 3 and a control circuit (not shown in the figure) form a conduction state, and the plurality of light-emitting diodes 3 can be turned on and off sequentially by controlling the circuit, thus forming a revolving lighting effect like a marquee , suitable for emergency lighting equipment or commercial purposes; it can be seen from the above structure that the purpose of the contact between the two electrodes 5 and the terminal 10 is only to conduct the circuit, and the specification also mentions that the style of the terminal 10 can be different according to the appearance of the electrodes 5 However, the illustrated ring-shaped clamp arm terminal 10 with an upper opening is only a preferred embodiment, and the illustrated ring-shaped clamp arm terminal 10 may provide the light-emitting lamp 1B with no angle limitation. However, the installation angle of the main body 4 has nothing to do with the fact that the plurality of LEDs 3 can be turned on and off sequentially to form a revolving light effect like a marquee, and of course it cannot solve the problem of uneven light, glare and light emission range. limited issues.

Due to the shortcomings of the limited light projection angle of LED lighting, it cannot be effectively improved at present. In order to control the light emitting angle, light emitting range and light uniformity of LED lighting fixtures, direct-lit LED lamps can only be changed by changing the arrangement of LEDs, or in the LED lighting. The light source is improved by adding a lens, and the refracting or reflective LED lamps are usually designed by designing a refracting or reflective cover or replacing the reflector to achieve the purpose of controlling the light output angle, light output range, and light output uniformity of the lamp.

First of all, as far as direct-type lamps are concerned, although good light output efficiency can be obtained, the light-emitting angle of LEDs cannot be adjusted, resulting in users being unable to adjust the most appropriate light-emitting angle, light-emitting pattern, and uniformity of light in the light-emitting area according to environmental needs. degree, the accompanying light environment comfort is also reduced

In conjunction with the two previous patents, a brief description of the light-emitting method of the direct-type LED lamp, please refer to Figure 4, US Patent No. 5136483 Illuminating device, this invention is a lamp applied to vehicles, which includes a plurality of ring-shaped side walls placed flat inside the lamp Light-emitting diodes 14, lamp reflectors 16 and heat dissipation fins 19, the light emitted by the light-emitting diodes 14 placed flat on the side wall is reflected by the curved reflector (the reflective structure surface with an arc-shaped bottom), which can generate mutually parallel light rays ; In this patent, since the light-emitting diode 14 is placed above the side wall inside the light fixture, only a part of the light-emitting angle range of the light-emitting diode 14 can be reflected by the reflector 16 to generate parallel rays, and the other The light in the luminous angle range is emitted at an undesired light angle, or is trapped inside the lamp and cannot be projected, so the light required by the user cannot be projected efficiently.

Please refer to FIG. 5 again, Japanese Patent Application Laid-Open No. 2004327670, which discloses a tiltable and rotatable LED lamp, which includes an obliquely placed LED 1, a substrate 2, a lamp body 10, a bracket 13 and a foot assembly 11 , by adjusting the rotation angle of the foot assembly 11 and the lamp body 10, the angle between the light emitting diode 1 and the substrate 2 is changed to obtain light in different directions; in this patent, since the light is direct, it does not go through any refraction or reflection The device is prone to glare, and the adjustable angle is limited, between 0° and 90°. If there is light in other directions, another set of devices needs to be used together; when replacing the lamp, it needs to be disassembled together with the substrate , causing inconvenience in replacement.

Therefore, a light-emitting diode lamp that can meet the user's needs and is easy to adjust the light emitting angle of the lamp and replace it is a problem that the related industry urgently needs to improve.

Contents of the invention

In view of the disadvantages of the conventional technology, the main purpose of the present invention is to provide a light emitting device with adjustable light output angle. High-efficiency direct projection on the path of light with light-controlling microstructure components, effectively controlling the light pattern of the lamp and the light uniformity of the light-emitting area.

The secondary purpose of the present invention is to provide a light-emitting device with an adjustable light output angle. The light-emitting diode is equipped with a separate base, which can be easily adjusted and replaced according to the user's different light-emitting color requirements or when the light-emitting diode fails. led.

In order to achieve the above purpose, the present invention proposes a light-emitting device that can adjust the light output angle, which includes:

At least one directional light source is electrically connected to the control circuit to emit light, and its projection angle is adjustable;

A light guide cover for the directional light source to be disposed inside, which has a bottom, a projection surface and at least one light outlet, and the light outlet is used to provide the light emitted by the directional light source to exit the light guide cover;

At least one light control microstructure is arranged in the light guide cover, and the light control microstructure is composed of a plurality of microstructure surfaces;

By adjusting the projection angle of the light emitted by the directional light source, it can be projected onto different refraction microstructure surfaces on the light control microstructure, so as to change the exit angle of the light emitted from the light guide cover.

Preferably, the light control microstructure is composed of a plurality of microstructure surfaces with refraction or reflection properties.

Preferably, the light outlet of the light guide cover is a light control microstructure provided with a microstructure surface having a refraction property.

Preferably, the light guide cover is provided with multiple layers of light-controlling microstructures, the multiple layers of light-controlling microstructures can be arranged in non-parallel layers, and the microstructure planes of each layer of light-controlling microstructures are different.

Preferably, the distribution surface of the light-controlling microstructure is one of a flat surface, a curved surface or a combination thereof, or its vertical section is formed by one of a left-right symmetrical slope and a curved surface or a combination thereof.

Preferably, the light control microstructure is formed in one of or a combination of ways such as surrounding, left-right symmetry, or parallel extension.

Preferably, the light guide cover is made of reflective material.

Preferably, the inner wall of the light guide cover is provided with a reflective layer.

Preferably, the reflective layer is a reflective diffusion film or formed by electroplating of metal materials such as aluminum or electroless nickel.

Preferably, the directional light source is arranged on an adjustment component, and the adjustment component includes:

The base is fixedly arranged in the light guide cover;

A movable part is movably arranged on the seat body and has an adjustable angle, and at least one directional light source can be accommodated on the movable part.

Preferably, the adjusting component is made of one of materials such as iron, aluminum, magnesium, copper, etc. with thermal conductivity and electrical conductivity, or an alloy combination thereof.

Preferably, the seat body and the movable part are pivotally connected in the form of a round hole and a round boss, and the round boss rotates in the round hole to make the seat on the movable part The directional light source can be rotated in a full circle.

Preferably, the seat body has at least one clip, and the clip has at least one circular hole;

The movable part has a bearing surface for the directional light source to be disposed on, and a circular convex column is arranged on the bearing surface corresponding to the position where the circular hole of the clip is disposed;

Thereby, inserting the circular protruding column into the circular hole can make the movable part form a pivotal connection state with the base body, and can rotate in a full circle around the axis center of the protruding post and the circular hole.

Preferably, there are multiple clamping pieces, and the multiple clamping pieces have concentric circular holes.

Preferably, the bearing surface is disposed in a light-transmitting tube, and the two axial ends of the tube are cylindrical.

Preferably, the tube body is made of one or a combination of materials such as glass and plastic.

Preferably, the base and the movable part are pivotally connected in the form of a spherical hole and a spherical body, and the spherical body rotates in the spherical hole to make the device installed on the movable part The directional light source can be rotated at any angle.

Preferably, the base has a spherical hole;

The movable part is a spherical body on which the directional light source is arranged;

Thereby, inserting the spherical body into the spherical hole can make the movable part and the base form a pivoted state, and can rotate at any angle in the spherical hole.

Preferably, the adjusting component has electrical continuity, and is used for electrically conducting the directional light source and the control circuit.

Preferably, the directional light source is a light emitting diode (Light Emitting Diode, LED).

Preferably, the directional light source is connected to a protection circuit, and the protection circuit is composed of a circuit overload protection device such as a fuse or a constant current IC.

Preferably, the directional light source is arranged in plural around the light control microstructure.

To sum up, the light-emitting device with adjustable light-emitting angle proposed by the present invention can adjust the light-emitting angle of each light-emitting diode according to the user's needs. Cooperating with the light-controlling microstructure arranged on the light guide cover, it can not only eliminate the glare It can change the overall light angle and light shape of the lamp, reduce the restrictions on changing the shape design of the lampshade and the production of the LED circuit board, and increase the flexibility of the use of the lamp; moreover, each LED light source can be manufactured into a standard shape and placed in the The standard receiving seat in the lamp reduces the maintenance difficulty of the LED light source and increases the ease for users to refit the LED lamp. It is indeed a light-emitting device with high luminous efficiency, easy maintenance, flexibility and light volume.

In order to have a further understanding and recognition of the structure, purpose and effect of the present invention, a detailed description is given below with reference to the accompanying drawings.

Description of drawings

1 to 5 are structural schematic diagrams of five known devices using LEDs as light sources.

Fig. 6 is a schematic structural view of a preferred embodiment of the projection light emitting device of the present invention.

FIG. 6A is a diagram showing the relationship between light traveling in different media.

FIG. 7 is a schematic structural view of another preferred embodiment of the projection-type light emitting device of the present invention.

Fig. 8 is a schematic structural view of the symmetrical arrangement of the embodiment in Fig. 6 .

FIG. 9 is a schematic diagram of a double-layer light control microstructure derived from the embodiment of FIG. 8 .

FIG. 10 is a schematic structural view of a preferred embodiment of the reflective light emitting device of the present invention.

Fig. 11 is a schematic structural view of another preferred embodiment of the reflective light emitting device of the present invention.

Fig. 12 is a schematic structural view of the symmetrical arrangement of the reflective light emitting devices in Fig. 10 .

Fig. 13 is a schematic structural view of the surround arrangement of light emitting diodes of the present invention.

FIG. 14 is a schematic diagram of a double-layer light control microstructure combined with a projective microstructure surface and a reflective microstructure surface according to the present invention.

FIG. 15 is a schematic diagram of a double-sided light control microstructure combined with a projective microstructure surface and a reflective microstructure surface according to the present invention.

Fig. 16 is an exploded perspective view of a preferred embodiment of the light emitting diode adjustment assembly of the present invention.

Fig. 17 is an assembled perspective view of a preferred embodiment of the light emitting diode adjustment assembly of the present invention.

Fig. 18 is a schematic diagram of a preferred embodiment of the present invention applied to a street lamp cover to change the light output angle.

Description of reference numerals: 10, 110, 210, 310, 410, 510, 610, 710, 810, 910-refractive light-emitting device; 20, 20a, 20b-light-emitting diode; 30, 430, 730, 930-light guide cover ; 31-bottom; 32, 432, 732-side wall; 33, 133, 433, 533-projection surface; 434-light outlet; 40, 140, 240, 340, 440-light control microstructure; 41, 241, 341 , 342, 441-refractive microstructure surface; 50-adjustment component; 51-seat; 511-clamp; 512-round hole; , A2-irradiated area; L, L1, L1a, L1b-light; L2, L2a, L2b, L3a, L3b-refracted light; L4, L4a, L4b-reflected light; Lr-reflected light; Lt-refracted light; n1, n2-medium (refractive index); θi-incident angle; θr-reflection angle; θt-refraction angle.

Detailed ways

The technical means and effects used by the present invention to achieve the purpose will be described below with reference to the accompanying drawings, and the embodiments listed in the following drawings are only for auxiliary description, to facilitate understanding, but the technical means of the present invention are not limited to Figures listed.

Please refer to FIG. 6, the refraction light-emitting device 10 with adjustable light output angle provided by the present invention includes at least one light-emitting diode 20, which is a directional light source. In other words, the light-emitting diode 20 can be of other types The directional light source is replaced by a light-emitting diode as an example here. The light-emitting diode 20 is electrically connected to the control circuit (not shown in the figure) to emit light, and its light projection direction is adjustable. The specific structure of the adjustable light projection direction of the light emitting diode 20 will be described later; A side wall 32 is arranged around it, and a projection surface 33 is formed in the side wall 32 corresponding to the bottom 31, and a light control microstructure 40 is arranged on the projection surface 33, and the light control microstructure 40 is composed of complex numbers with refractive The characteristic refraction microstructure surface 41 constitutes, and the projection surface 33 and the light control microstructure 40 can provide light to pass through; As for the form formed by the refraction microstructure surface 41, it can be continuous or discontinuous zigzag or with a plane 1. The curved surfaces are combined into irregular surfaces, and the light control microstructure 40 showing a continuous zigzag shape is shown as an illustration only.

According to the principle of light refraction, Snell's Law (Snell's Law), a very important law in geometric optics, describes the relationship between light rays traveling in different media. Here is a brief description of the law, as shown in Figure 6A, medium n1 and The medium n2 has different refractive indices. When the light L is incident on the medium n2 from the medium n1, part of the light Lr will be reflected, and part of the light Lt will penetrate into the medium n2. Snell's Law points out that the difference between them should obey the following two relations:

θi=θr

n1 sinθi＝n2 sinθr

θi, θr, θt respectively represent the angle of incidence, reflection and refraction, n1 and n2 respectively represent the refractive index of medium n1 and medium n2;

According to the above theory to support the present invention, as shown in FIG. 6 , the light L1 emitted by the light emitting diode 20 is projected on the refraction microstructure surface 41 on the light control microstructure 40 to form refraction light L2 to exit the light guide cover 30, Since the angle of the light emitting diode 20 can be adjusted, the position projected on the light control microstructure 40 can be changed, thereby changing the angle of the refracted light L2 emitted from the light guide cover 30; the light guide cover 30 is made of a material with reflective properties. , or inside the side wall 32 of the light guide cover 30, a reflective diffusion film or a reflective layer formed by electroplating of metal materials such as aluminum or electroless nickel is provided to improve the light reflection efficiency of the light guide cover 30.

Regarding the aforementioned light control microstructure 40, a Fresnel lens structure can be used. Fresnel (Fresnel) is an optical component with plano-convex or plano-concave lens converging or diverging light characteristics, and the surface is formed like a zigzag. Concentric rings, the principle is to divide the curved surface of traditional spherical or aspheric lenses into many concentric rings, and then move each concentric ring to the same plane to form. If the translation is extended, parallel sawtooth rows can be formed on the plane , its main advantage is that it has good focusing ability, so it is widely used in optical instruments. In addition to the Fresnel (Fresnel) lens structure, other microstructure objects similar to Fresnel (Fresnel) can also be used. The key point is that the light control effect is formed by the refraction microstructure surface formed by the microstructure.

Please refer to FIG. 7 , this embodiment is based on the embodiment of FIG. 6 , the light emitting device 110 includes at least one light emitting diode 20 that can adjust the projection angle and a light guide cover 30 , the light guide cover 30 has a bottom 31. The side wall 32, a projection surface 133 is formed in the side wall 32 corresponding to the bottom 31, and the light control microstructure 40 is arranged on the projection surface 133. The functions of the above components and the functions they can achieve are the same as The effect of the components shown in Figure 6 is the same, so no more details, the feature of this embodiment is that the projection surface 133 is a curved surface (the projection surface 33 shown in Figure 6 is a plane), the light control microstructure 40 is along the The curvature of the projection surface 133 is set; according to the principle of light refraction shown in FIG. Surface 41 can form the refracted light L2 to exit the light guide cover 30 from the projection surface 133. Since the light emitting diode 20 can adjust the angle, it can change the position projected on the light control microstructure 40, and then change the light guide cover 30. The angle of the reflected light L2 is 30.

Please refer to FIG. 8, this embodiment is based on the embodiment of FIG. 6, the light emitting device 210 includes symmetrically arranged light emitting diodes 20a, 20b and a light guide cover 30 which can adjust the projection angle, and the light guide cover 30 has a bottom 31, a side wall 32, and a projection surface 33. The projection surface 33 is provided with a light control microstructure 240. The functions of the above-mentioned components and the functions they can achieve are the same as those of the components shown in FIG. 6 , and will not be repeated here. , the present embodiment is characterized in that the light control microstructure 240 is symmetrically arranged left and right, and corresponds to a light emitting diode 20a, 20b respectively. Similarly, according to the principle of light refraction shown in FIG. 6A, Snell's Law (Snell's Law), The light rays L1a, L1b emitted by the light emitting diodes 20a, 20b are projected on the refraction microstructure surface 241 on the light control microstructure 240, which can respectively form refracted light L2a, L2b to be emitted from the light guide cover 30 from the projection surface 33, and can Control the light-emitting diodes 20a, 20b to emit light on one side or both sides. Since the light-emitting diodes 20a, 20b can adjust the angle, the position projected on the light-controlling microstructure 240 can be changed, and then the refracted light L2a emitted from the light guide cover 30 can be changed. , the angle of L2b; in addition, the light control microstructure 240 of this embodiment can also be disposed on the curved projection surface 133 shown in FIG. 7 .

Please refer to FIG. 9, this embodiment is based on the embodiment of FIG. 8, the light emitting device 310 includes symmetrically arranged light emitting diodes 20a, 20b with adjustable projection angles and a light guide cover 30, the light guide cover 30 has a bottom 31, a side wall 32, and a projection surface 33. The projection surface 33 is provided with a light control microstructure 340. The functions of the above-mentioned components and the functions they can achieve are the same as those of the components shown in FIG. , the present embodiment is characterized in that the light control microstructure 340 has two-layer microstructure surfaces 341, 342, according to the light refraction principle shown in Figure 6A Snell's Law (Snell's Law), the light emitted by the light emitting diode 20a L1a is projected on the reflective microstructure surface 341 on the light control microstructure 340 to form the first refracted light L2a. For the photomask 30, since the light-emitting diodes 20a and 20b can adjust the projection angle, the light-emitting diode 20b can emit light L1b at different angles and project it on the refraction microstructure surface 341 on the light control microstructure 340 to form the first Refracted light L2b, when the reflected light L2b strikes the second-layer microstructure surface 342, it can be refracted to form another refracted light L3b whose projection angle is different from that of the refracted light L3a to exit the light guide cover 30, and so on, if The arrangement of microstructure surfaces with different directions, not limited to the microstructure surfaces 341 and 342 parallel to each other, together with the angle-adjustable light-emitting diodes, enables the light-emitting device to emit light with different refraction angles.

Please refer to the structure of another embodiment of the present invention shown in FIG. 10 , which is different from the above-mentioned embodiments. Constituted, the light guide cover 430 has a projection surface 433, a side wall 32 is provided around the projection surface 433, and a light outlet 434 is formed in the side wall 32 corresponding to the projection surface 433, and a light outlet 434 is formed on the projection surface 433 is provided with a light control microstructure 440, which is composed of a plurality of reflective microstructure surfaces 441 with reflective properties. Light; similarly, the form formed by the reflective microstructure surface 441 is not limited, it can be continuous or discontinuous zigzag or combined with a plane or arc surface to form an irregular surface, the light control microstructure 440 showing continuous zigzag is shown in the figure For illustration only.

According to the principle of light reflection, that is, the design principle that the light incident angle is equal to the light reflection angle, the light L1 emitted by the LED 20 is projected on the reflective microstructure surface 441 on the light control microstructure 440, and the reflected light L4 can be formed by the light output. The port 434 emits the light guide cover 430, and since the light emitting diode 20 can adjust the angle, it can change the position projected on the light control microstructure 440, and then change the angle of the reflected light L4 emitted from the light guide cover 430; similarly, The light guide cover 430 is made of a material with reflective properties, or a reflective diffusion film or a reflective layer formed by electroplating metal materials such as aluminum or electroless nickel is arranged inside the side wall 32 of the light guide cover 430 to improve The light reflection efficiency of the light guide cover 430 .

Please refer to FIG. 11, this embodiment is based on the embodiment of FIG. 10, the light emitting device 510 includes at least one light emitting diode 20 that can adjust the projection angle and a light guide cover 430, the light guide cover 430 has a The projection surface 533 is provided with a side wall 32 around the projection surface 533, and a light outlet 434 is formed in the side wall 32 corresponding to the projection surface 533, and a light control microstructure 440 is provided on the projection surface 433. The light control microstructure 440 is composed of a plurality of reflective microstructure surfaces 441 with reflective properties. The functions of the above-mentioned components and the functions they can achieve are the same as those of the components shown in FIG. Because the projection surface 533 is a curved surface (the projection surface 433 shown in FIG. 10 is a plane), the light control microstructure 440 is arranged along the curvature of the projection surface 533; similarly, according to the principle of light reflection, that is The design principle that the light incident angle is equal to the light reflection angle, the light L1 emitted by the light emitting diode 20 is projected on the reflective microstructure surface 441 on the light control microstructure 440, and the reflected light L4 can be formed and emitted from the light outlet 434 to guide the light As for the cover 430 , since the angle of the light emitting diode 20 can be adjusted, the position projected on the light control microstructure 440 can be changed, thereby changing the angle of the reflected light L4 emitted from the light guide cover 430 .

Please refer to Figure 12, this embodiment is based on the embodiment of Figure 10, the light emitting device 610 includes symmetrically arranged light emitting diodes 20a, b and a light guide cover 430 that can adjust the light projection angle, the light guide cover 430 has a projection surface 433, a side wall 32, and a light outlet 434. The surface of the projection surface 433 facing the light outlet 434 is provided with a light control microstructure 440. The functions of the above components and the effects they can achieve are the same as those shown in FIG. The functions of the display components are the same, so I won’t repeat them here. The feature of this embodiment is that the light control microstructure 440 is arranged symmetrically on the left and right, and corresponds to a light emitting diode 20a, 20b respectively. Similarly, according to the light reflection principle, that is, the light incident angle Equal to the design principle of the light reflection angle, the light rays L1a, L1b emitted by the light emitting diodes 20a, 20b are projected on the reflective microstructure surface 441 on the light control microstructure 440 to form reflected light L4a, L4b emitted from the light outlet 434 The light guide cover 430 can control the light-emitting diodes 20a, 20b to emit light on one side or both sides. Since the light-emitting diodes 20a, 20b can adjust the angle, the position projected on the light-controlling microstructure 440 can be changed, and then the light emitted from the light guide can be changed. The angles of the reflected light L4a, L4b of the mask 430; in addition, the planar projection surface 433 of this embodiment can also be replaced by the curved projection surface 533 shown in FIG. 11 .

Please refer to the embodiment shown in FIG. 13. The light emitting device 710 has a circular light guide cover 730, which has a surrounding side wall 732, and a plurality of light emitting diodes 20 are surrounded inside the side wall 732, and the plurality of light emitting diodes 20 can be adjusted. The emitted light L1 concentrates toward the center of the circular light guide cover 730 to emit light, regardless of whether it is matched with the light control microstructure 40 with refractive properties as shown in FIG. 6 or the light control microstructure 440 with reflective properties as shown in FIG. 10 , the light L1 can be concentratedly refracted or reflected into a single beam to exit the light guide cover 730. In addition, the plurality of light emitting diodes 20 can also be adjusted to have different projection angles, so that the reflected beams can exit the light guide cover 730 at different angles. .

Please refer to FIG. 14, this embodiment is based on the embodiment of FIG. 12, the light emitting device 810 includes symmetrically arranged light emitting diodes 20a, 20b with adjustable projection angles and a light guide cover 430, the light guide cover 430 has a projection surface 433, a side wall 432, and a light outlet 434. The surface of the projection surface 433 facing the light outlet 434 is provided with a light control microstructure 440. The functions of the above components and the effects they can achieve are the same as those shown in FIG. The functions of the components are the same as those shown in FIG. The surface 33 is provided with a light control microstructure 240 on the refraction microstructure surface 241 with refraction characteristics; according to the principle of light reflection and refraction, the light L1a emitted by the light emitting diode 20a is projected on the reflective microstructure on the light control microstructure 440 The surface 441 forms the reflected light L4a. When the reflected light L4a hits the light control microstructure 240 on the lower layer, it can be refracted through the refracting microstructure surface 241 to form the refracted light L2a. Since the light emitting diodes 20a and 20b can adjust the light projection angle Therefore, the light emitting diode 20b can emit light L1b at different angles and project it on the reflective microstructure surface 441 on the light control microstructure 440 to form reflected light L4b. When the reflected light L4b hits the light control microstructure 240 on the lower layer, it can be Another refracted light L2b whose projecting angle is different from the refracted light L2a is refracted through its refracting microstructure surface 241; in addition, the planar projecting surfaces 33 and 433 in this embodiment can also be replaced as shown in Fig. 7 and Fig. 11 The curved projection surface 133,533.

Please refer to FIG. 15 again. The light emitting device 910 is combined with the light emitting device 10 in FIG. 6 and the light emitting device 410 in FIG. The structured surface 41 and the reflective microstructured surface 441 have refractive properties and reflective properties respectively, so the positions of the light control microstructures 40, 440 are different, and the light emitting diodes 20a, 20b also match the positions of the light control microstructures 40, 440 They are arranged at different positions, so that the light rays L1a, L1b emitted by the light emitting diodes 20a, 20b can be formed into refracted light L2a and reflected light L4b respectively to exit the light guide cover 930. Similarly, if the structures of the other embodiments described above are matched with each other , different lighting effects can be obtained.

Based on the above-mentioned embodiments, it can be seen that the light control microstructure of the light guide cover of the present invention can be a single plane, a curved surface, or a combination thereof, arranged in one or more layers, and can also be a plane with a left-right symmetrical vertical section. Depending on the configuration of the light-controlling microstructure 240, it can be determined whether the light-controlling microstructure is composed of one of them or a combination thereof, such as surrounding, left-right symmetry, or parallel extension. , together with the adjustment of the arrangement of the corresponding light-emitting diodes and their projection angles, the light-emitting device can achieve the purpose of changing the light-emitting angle. Please refer to FIG. 16 and FIG. 17 , which illustrate the specific structure of the light-emitting diode that can adjust the projection angle of the present invention. The light-emitting diode 20 is arranged on an adjustment assembly 50, and the adjustment assembly 50 includes a base 51 and a movable part. 52, the seat body 51 is fixedly arranged in the light guide cover (the light guide cover 30 shown in FIG. The circular hole 512 in the center, and the movable part 52 has a bearing surface 521 for the light emitting diode 20 to be arranged on it, where the bearing surface 521 corresponds to the circular hole 512 of the clip 511 of the base 51 A circular protruding post 522 is provided, and the circular protruding post 522 is inserted in the circular hole 512, so that the movable part 52 and the seat body 51 can form a pivoted state, and the protruding post 522 can be connected to the circular hole. The axis of 512 is the center and rotates in a full circle. For stably supplying the LED power supply, chip-type LEDs 20 are used here. The base body 51 and the movable part 52 are made of thermally conductive and conductive iron, Aluminum, magnesium, copper and other materials or their alloy combinations, so that the heat generated by the light emitting diode 20 can be quickly dissipated. In the case of good heat dissipation, a transparent cover can be placed outside the light emitting diode 20. Tube body (not shown in the figure), to protect this light-emitting diode 20, as this tube body can be made of one or its combination of materials such as glass, plastics, or this light-emitting diode 20 can be connected to a by fuse or constant current A protection circuit formed by circuit overload protection devices such as ICs, to prolong the service life of the light emitting diode 20.

As for the structure of the adjustment assembly 50 shown in Figure 16 and Figure 17 above, it is only a better illustration example. In addition, the spherical hole and the spherical body can also be pivoted to achieve the same function. For example, the light-emitting diode 20 is arranged on a spherical body, and the spherical body is embedded in a spherical hole. By rotating the spherical body in the spherical hole, the light-emitting diode 20 can be used as Rotation at any angle.

According to the characteristics of the adjustable light output angle of the present invention, it can be applied to various lamps. Please refer to FIG. 18. The reflective light emitting device 410 shown in FIG. 20 has the ability to adjust the light projection angle, therefore, the light angle of the reflected light emitted from the light guide cover 430 can be adjusted according to the needs. This feature is applied to street lamps, which can make the light output of street lamps have variability. If the plurality of LEDs 20 arranged in a ring as shown in Figure 13 are applied to street lamps, the reflected light can be adjusted by adjusting the projection angle of the plurality of LEDs 20. The light of the light presents an ellipse or other geometric shapes. Similarly, the refraction light emitting device 10 with adjustable light output angle shown in FIG. 6 can also achieve the same effect

The above descriptions are only the preferred embodiments of the present invention, and should not be used to limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the claims of the present invention should still belong to the scope of the present invention.

covered by the patent.

Claims (22)

1. the light-emitting device that can adjust rising angle is characterized in that it comprises:

At least one directive property light source electrically conducts and can emit beam with control circuit, and the light projector angle of each directive property light source can arbitrarily angledly be adjusted;

One light-guiding shade is to be arranged in it for this directive property light source, and it has a bottom, is provided with sidewall in this bottom periphery, corresponds to this place, bottom and form a projection surface in this sidewall;

At least one control light micro-structural is to be arranged in this light-guiding shade, and this control light micro-structural is made of plural micro-structural face;

By adjusting the light projector angle of this directive property light source emitted light, can be projected to the difference refraction micro-structural face on this control light micro-structural, to change the rising angle that penetrates this light-guiding shade.

2. the light-emitting device of adjusting rising angle as claimed in claim 1 is characterized in that, the control light micro-structural in this light-guiding shade is made of the micro-structural face that plural number has refraction or a reflection characteristic.

3. the light-emitting device of adjusting rising angle as claimed in claim 2, it is characterized in that, this light-guiding shade has a light-emitting window, and the light in this light-guiding shade penetrates this light-guiding shade by this light-emitting window, has the control light micro-structural of the micro-structural face of refracting characteristic in this light-emitting window setting.

4. the light-emitting device of adjusting rising angle as claimed in claim 1 is characterized in that, this light-guiding shade is provided with plural layer control light micro-structural, and the control light micro-structural of this plural layer is that multilayer is set not parallelly, and the micro-structural face difference of each layer control light micro-structural.

5. the light-emitting device of adjusting rising angle as claimed in claim 1, it is characterized in that, the branch cloth cover of this control light micro-structural is the combination of single plane, curved surface one of them or plane and curved surface, or vertical section to be symmetrical inclined-plane and curved surface one of them or vertical section constituted by the combination of symmetrical inclined-plane and curved surface.

6. the light-emitting device of adjusting rising angle as claimed in claim 1, it is characterized in that, this control light micro-structural be with around, left-right symmetry or extend in parallel mode one of them or around with symmetrical combination, around with the combination that extends in parallel mode, or left-right symmetry and the combination that extends in parallel mode constitute.

7. the light-emitting device of adjusting rising angle as claimed in claim 1 is characterized in that, this light-guiding shade is to be made of the material with reflective characteristic.

8. the light-emitting device of adjusting rising angle as claimed in claim 1 is characterized in that sidewall is provided with reflector layer within this light-guiding shade.

9. the light-emitting device of adjusting rising angle as claimed in claim 8 is characterized in that, this reflector layer is the diffusion barrier sheet of reflection-type, by aluminium or do not have the electrolytic nickel metal material and electroplate and to form this reflector layer.

10. the light-emitting device of adjusting rising angle as claimed in claim 1 is characterized in that, this directive property light source is to be arranged at one to adjust on the assembly, and this adjustment assembly comprises:

One pedestal is to be fixedly arranged in this light-guiding shade;

One movable part is to be arranged on this pedestal versatilely and the tool adjustable angle, on this movable part is can hold at least one directive property light source is set.

11. the light-emitting device of adjusting rising angle as claimed in claim 10, it is characterized in that this adjustment assembly is to be constituted or be made of the combination of the ferroalloy of tool thermal conductivity and electric conductivity, aluminium alloy, magnesium alloy, copper alloy by one of the iron of tool thermal conductivity and electric conductivity, aluminium, magnesium, copper material.

12. the light-emitting device of adjusting rising angle as claimed in claim 10, it is characterized in that, be that mode with circular hole and boss post is articulated between this pedestal and this movable part, can make the wholecircle revolution by in described circular hole, rotate, make the directive property light source that is arranged on the described movable part by described boss post.

13. the light-emitting device of adjusting rising angle as claimed in claim 10 is characterized in that:

This pedestal, it has at least one folder, and this folder has at least one circular hole;

This movable part, it has a loading end for this directive property light source setting thereon, corresponds to this folder circular hole placement in this loading end, is provided with circular projection;

By this, should be inserted in this circular hole by the circle projection, can make this movable part and this pedestal form the pivot joint state, and can this projection and the axle center of this circular hole be that the wholecircle revolution is made at the center.

14. the light-emitting device of adjusting rising angle as claimed in claim 13 is characterized in that, this folder is to be provided with a plurality ofly, and should the plural number folder has the circular hole of concentric.

15. the light-emitting device of adjusting rising angle as claimed in claim 13 is characterized in that, this loading end is arranged in the body of a tool light transmission, and two axial ends of this body are cylindrical.

16. the light-emitting device of adjusting rising angle as claimed in claim 15 is characterized in that, this body is that the combination by one of glass, plastic material or glass, plastic material is constituted.

17. the light-emitting device of adjusting rising angle as claimed in claim 10, it is characterized in that, be that mode with ball-type hole and ball-type body is articulated between this pedestal and this movable part, in this ball-type hole rotation, this directive property light source that is arranged on this movable part can be rotated by this ball-type body at any angle.

18. the light-emitting device of adjusting rising angle as claimed in claim 17 is characterized in that:

This pedestal, it has a ball-type hole;

This movable part, it is a ball-type body, is for this directive property light source is set on this ball-type body;

By this, this ball-type body is embedded in this ball-type hole, can make this movable part and this pedestal form the pivot joint state, and can in this ball-type hole, do to rotate at any angle.

19. the light-emitting device of adjusting rising angle as claimed in claim 10 is characterized in that, this adjustment assembly has the property of conducting, in order to this directive property light source of conducting and control circuit electrically.

20. the light-emitting device of adjusting rising angle as claimed in claim 10 is characterized in that, this directive property light source is a light emitting diode.

21. the light-emitting device of adjusting rising angle as claimed in claim 10 is characterized in that, this directive property light source is to be connected in a holding circuit, and this holding circuit is made of fuse or current stabilization IC circuit overloads protective device.

22. the light-emitting device of adjusting rising angle as claimed in claim 10 is characterized in that, described device is provided with a plurality of directive property light sources, and described a plurality of directive property light source is to be arranged at described control light micro-structural periphery.

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