CN214038001U - Lighting device - Google Patents

Abstract

The utility model discloses a lighting device, including the light guide plate, light source device and reflector, the structure through the transmitter will come from light source device's light and fall into the income plain noodles that two parts got into the light guide plate, the direct side direction of light L1 jets into the income plain noodles to the light guide plate, thereby make the light guide plate near-end evenly luminous, light L2 jets into to the curved surface of reflection, the curved surface of reflection reflects light L2 to the income plain noodles of light guide plate, and then the luminous homogeneity of light guide plate distal end, make lighting device beam angle bigger, light can spread to bigger scope, thereby make lighting device illumination scope bigger, the light distribution that sends is more even, and can improve illumination efficiency and luminous flux.

Description

Lighting device

Technical Field

The utility model relates to the field of lighting, especially, relate to a lighting device.

Background

With the improvement of living standard of people, various lamps are more and more popular, and among them, lamps with small volume, low power consumption, long service life, high brightness, small heat, environmental protection and no toxicity are more and more popular.

Generally, a lamp includes a power source, a reflective film, a light guide plate, a diffuser plate, a light bar (a plurality of beads are provided on the light bar), and the like. The light guide plate is the heart of lamps and lanterns, becomes the high-tech product of area source with the line source, and the lamp strip sets up at the light guide plate side, and the light source is changed into the area source from the net on the straight line via the light guide plate and is launched from the light guide plate, and this kind of mode is the lamp pearl side subsides. When the mode that adopts lamp pearl side to paste, because the income plain noodles of light guide plate is crooked, can lead to the lamp strip crooked thereupon so in order, can cause the lamp pearl to follow the coming off on the lamp strip very easily, lead to the lamp pearl to be difficult to be fixed in the problem on the lamp strip. Meanwhile, the light incoming part of the light guide plate is too bright by adopting a lamp bead side pasting mode, so that the light uniformity of the light guide plate is reduced; the shielding area of the whole lamp is widened, namely the shielding area formed by the light guide plate and other components is wider. Therefore, the mode of adopting the lamp bead side to paste can bring a lot of discomfort to users in vision and molding.

Therefore, there is a need to provide a new lighting device to solve the problems faced by the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lighting device, the mode of solving lamp pearl side subsides leads to the lamp pearl to drop easily, and the lamp strip is difficult to fixed technical problem.

To achieve the above object, the present invention provides a lighting device, including: a light guide plate having at least one opening region formed at the middle thereof; the light source device is arranged above the light guide plate and is opposite to the at least one opening area; the reflector is arranged below the light guide plate; the reflector includes: the bar-shaped body is arranged opposite to the light source device; the reflecting part is protruded out of the upper surface of the strip-shaped body and is positioned in the opening area; the reflecting part comprises at least one reflecting curved surface which is arranged opposite to the inner side wall of the at least one opening area.

Furthermore, the inner side wall of the opening area is a light incident surface.

Further, the curved reflecting surface is used for reflecting the light from the light source device into the light incident surface.

Furthermore, the included angle between the tangent line of any point of the reflecting curved surface and the inner side wall of the opening area corresponding to the reflecting curved surface is 0-90 degrees.

Further, the curved reflecting surface is any one of a polished surface, a polished surface sprayed with white oil, and a frosted surface sprayed with white powder.

Furthermore, the reflector comprises a strip-shaped groove which is recessed in the top surface of the reflecting part.

Further, the material comprises aluminum profiles or high-reflection plastics.

Further, the light guide plate is a parabolic light guide plate, and a plane of depression of the parabolic light guide plate is elliptical.

Furthermore, a connecting block is arranged between the two opening areas; a clamping groove is arranged between the two adjacent reflecting parts at the head and the tail; the shape of the connecting block is consistent with that of the clamping groove.

Furthermore, a reflecting part is arranged at the end part of the strip-shaped body, and the end part of the reflecting part is U-shaped; the shape of an opening area positioned at the edge of the light guide plate is matched with the shape of a reflecting part positioned at the end part of the strip-shaped body.

Further, the light source device comprises a lamp panel; and a plurality of LED lamps arranged on the lamp panel in an array manner.

Further, the lighting device also comprises a strip-shaped heat conducting piece which is arranged between the light source device and the top cover.

Furthermore, the lighting device also comprises a top cover which is arranged above the light source device; and side covers arranged at two ends of the top cover.

Further, the lighting device further comprises a fixing device for fixing the top cover, the strip-shaped heat conducting member, the light source device, the light guide plate and the reflector together in sequence.

The technical effect of the utility model lies in, the utility model provides a lighting device, the structure through the transmitter will come from the light of light source device and fall into the income plain noodles that the light guide plate got into in two parts, the direct side direction of light L1 kicks into the income plain noodles to the light guide plate, thereby make the light guide plate near-end evenly luminous, light L2 kicks into to the reflection curved surface, the reflection curved surface reflects light L2 to the income plain noodles of light guide plate, and then the luminous homogeneity of light guide plate distal end, make lighting device beam angle bigger, light can spread to bigger scope, thereby make lighting device illumination scope bigger, the light distribution that sends is more even, and can improve illumination efficiency and luminous flux.

Further, the utility model discloses a light mode is gone into to reflective light guide plate, and light source device locates the light guide plate top, can avoid lamp pearl to damage and lamp strip installation difficulty scheduling problem to effectively improve the light guide plate homogeneity, go into the light angle through the structural adjustment of reflector and avoid curved surface or heterotypic light guide plate the problem of light and shade stripe to appear.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is an exploded view of a lighting device according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a light guide plate according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a light source device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a reflector according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view of a lighting device according to an embodiment of the present invention.

Fig. 6 is a propagation path diagram of light according to an embodiment of the present invention.

Fig. 7 is a schematic view of an overall structure of a lighting device according to an embodiment of the present invention.

Fig. 8 is a top view of a light guide plate according to another embodiment of the present invention.

The components of the drawings are identified as follows:

100. 200 lighting devices; 10 a light guide plate;

20 a light source device; 30 a reflector;

40 strip-shaped heat conducting members; 50 a top cover;

60 side covers; 70 a fixing device;

80 a drive device; 90 connecting wires;

11 a light guide plate body; 12 an open area;

13U-shaped mouth; 14, connecting blocks;

21 lamp panel; 22LED lamps;

23 lamp panel screw holes; 121 incident surface;

31 a strip-shaped body; 32 a reflection part;

33 reflector screw holes; 321 a reflective curved surface;

322 card slot; 323 a strip-shaped groove;

41 screw holes of the heat conducting pieces; 51 a top cover screw hole;

l1, L2 light rays.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

As shown in fig. 1, fig. 1 is an exploded view of a lighting device according to an embodiment of the present invention.

The present embodiment provides an illumination device 100, which includes a light guide plate 10, a light source device 20 and a reflector 30, wherein the light source device 20 is disposed above the light guide plate 10, and the reflector 30 is disposed below the light guide plate 10. In the present embodiment, the reflector 30 is adopted to reflect the light source onto the light guide plate 10 (i.e. the light incident mode of the reflective light guide plate), so that the uniformity of the light guide plate 10 can be effectively improved, and the problem of light and dark stripes on the curved surface or the special-shaped light guide plate 10 can be avoided by adjusting the light incident angle, which will be described in detail below.

As shown in fig. 2, fig. 2 is a schematic structural diagram of a light guide plate according to an embodiment of the present invention.

The light guide plate 10 has a symmetrical integral structure, and may be a parabolic or circular light guide plate, or may be a planar light guide plate, which is not particularly limited herein. When the light guide plate 10 is a parabolic or circular light guide plate, the top surface thereof is preferably elliptical, which is beneficial to increase the illumination range of the illumination device 100 and to make the emitted light distribution more uniform. The light guide plate 10 includes a light guide plate body 11, at least one opening area 12 is disposed in the middle of the light guide plate body 11, the opening area 12 near the edge of the light guide plate body 11 has a U-shaped opening 13, and the U-shaped opening 13 is mainly convenient for the installation or the disassembly maintenance of other components in the opening area 12. A connecting block 14 is provided between two adjacent opening areas 12 to partition and form a plurality of opening areas 12. In the present embodiment, the inner sidewall of the opening region 12 is a light incident surface 121 for receiving the light emitted from the light source device 20, so that the light is totally reflected in the light guide plate 10 and uniformly emitted at each position of the light guide plate 10.

As shown in fig. 3, fig. 3 is a schematic structural diagram of a light source device according to an embodiment of the present invention.

A light source device 20 disposed opposite to the at least one opening area 12. The light source device 20 includes a lamp panel 21, a plurality of LED lamps 22 and lamp panel screw holes 23, the plurality of LED lamps 22 are arranged in an array on the lamp panel 21, and the plurality of lamp panel screw holes 23 penetrate through the lamp panel 21. A plurality of LED lamps 22 are used to provide a light source.

As shown in fig. 4-5, fig. 4 is a schematic structural diagram of a reflector according to an embodiment of the present invention; fig. 5 is a cross-sectional view of a lighting device according to an embodiment of the present invention.

The reflector 30 includes a bar-shaped body 31, a reflection part 32, and a reflector screw hole 33. The bar-shaped body 31 is disposed opposite to the light source device 20. The reflection portion 32 protrudes from the upper surface of the strip-shaped body 31 and is located in the opening area 12. A plurality of reflector screw holes 33 sequentially penetrate from the top of the reflection portion 32 to the bottom of the bar-shaped body 31.

The reflection portion 32 includes at least one curved reflection surface 321 disposed opposite to the inner sidewall of the at least one opening region 12. In the present embodiment, the reflection portion 32 has two symmetrical reflection curved surfaces 321, and the reflection curved surfaces 321 are mainly used for reflecting the light from the light source device 20 into the light incident surface 121, i.e., the inner side wall of the opening region 12. In this embodiment, an included angle between a tangent line of any point of the curved reflective surface 321 and an inner sidewall of the opening region 12 corresponding to the curved reflective surface 321 is 0 to 90 degrees, preferably 30 to 60 degrees, and within the range of 30 to 60 degrees, more light rays are reflected from the curved reflective surface 321 to the light incident surface 121, so as to enter the light guide plate 10, and the light rays are totally reflected inside the light guide plate 10, emit light to the far end of the light guide plate 10, and improve the uniformity of light emission at the far end of the light guide plate 10 under the coordination of the dots of the light guide plate 10. The curved reflecting surface 321 is mainly adjusted according to the curvature of the light guide plate 10 to improve the uniformity of light propagating through the light guide plate 10.

As shown in fig. 6, fig. 6 is a propagation path diagram of light provided by the embodiment of the present invention.

In actual operation, the light emitted from the LED lamp 22 is split into two portions and enters the light guide plate 10. The incident light L1 directly enters the light incident surface 121 of the light guide plate laterally, and the incident angle of the light L1 on the light incident surface 121 is greater than 0 ° and less than or equal to 60 °. Light L1 forms a batwing light distribution after entering light guide plate 10, such that this portion of the light is emitted uniformly at the proximal end of light guide plate 10. Incident light L2 is incident into curved reflective surface 321, and according to the law of reflection, light L2 enters into light incident surface 121 perpendicularly, and this light L2 shoots at the far end of light guide plate 10, and under the cooperation of the dots of light guide plate 10, is favorable to improving the light-emitting uniformity at the far end of light guide plate 10, makes light can spread to bigger scope, thereby makes lighting device 100's illumination scope bigger, and the light distribution that sends is more even.

Therefore, the structure of 30 can make the distribution of the two light beams L1, L2 emitted from the LED lamp 22 reasonable, which is beneficial to the uniform light emission of the whole lighting device 100 and the expansion of the illumination range.

In the present embodiment, the far end of the light guide plate 10 refers to the light guide plate 10 far from the end of the LED lamp 22, and the near end of the light guide plate 10 refers to the light guide plate 10 near the end of the LED lamp 22.

The light propagation principle of the light ray L2 between the reflector 30 and the light guide plate 10 will be described in detail as follows:

first, any point coordinate on the curved reflective surface 321 is a (x, y), a unit vector (Inx, Inz) In the light incident direction is denoted by In, and a unit vector (Outx, Outz) In the light emitting direction is denoted by Out. Where N denotes a normal vector (Nx, Nz), T denotes a tangent vector (Tx, Tz), and T × N is 0, and when the light incidence angle is β, Tan β is x/z.

According to the law of reflection: n-out;

the first point coordinate of the reflector 30 is determined as B (x1, y1) according to the size and height of the opening of the desired curved reflecting surface 321,

and so on:

a first point (x1, y1) ═ a, b;

a second point (x2, y 2);

……

point n (xn, yn).

Next, the coordinates of the light incident surface 121 of the light guide plate 10 are set to (a, b);

Inx(1)＝(x1-0)/sqrt((x1-0)^2+(z1-0)^2) ①；

Inz(1)＝(z1-0)/sqrt((x1-0)^2+(z1-0)^2) ②；

outx(1)＝(a-x1)/sqrt((a-x1)^2+(b-z1)^2) ③；

outz(1)＝(b-z1)/sqrt((a-x1)^2+(b-z1)^2) ④。

finally, according to N-in-out, T-N-0, Tan β -x/z; and (4) solving the coordinates of any point on the curve to obtain a curve connected into a reflecting curved surface.

Therefore, when the light L2 is reflected by the curved reflective surface 321 and enters the light incident surface 121 of the light guide plate, the light emitting uniformity at the far end of the light guide plate 20 can be improved, so that the beam angle of the lighting device 100 is larger, the light can be diffused to a larger range, the lighting device 100 has a larger illumination range, the emitted light is distributed more uniformly, and the illumination efficiency and the luminous flux can be improved.

Further, a clamping groove 322 is formed between two adjacent reflection portions 32 end to end, wherein the shape of the connecting block 14 is consistent with the shape of the clamping groove 322, the connecting block 14 is clamped into the clamping groove 322, and the clamping groove 322 provides a supporting function for the connecting block 14.

Each reflector 30 includes a strip-shaped groove 323 recessed from the top surface of the reflector 32. The strip-shaped groove 323 is parallel to the central axis of the reflection portion 32. The strip-shaped groove 323 is mainly used for facilitating the reflector screw hole 33 to penetrate from the top of the reflecting part 32 to the bottom of the strip-shaped body 31; on the other hand, it is ensured that the top of the reflection portion 32 is prevented from colliding with the light source device 20 during the assembly of the lighting device 100.

The end of the reflecting portion 32 at the end of the strip-shaped body 31 is U-shaped, and the shape of the U-shaped end is adapted to the shape of the U-shaped opening of the light guide plate 10. The shape of the opening area 12 at the edge of the light guide plate 10 is adapted to the shape of a reflection part 32 at the end of the strip-shaped body 11, so that the reflection part 32 can be easily installed or removed from the opening area 12 of the light guide plate 10 for maintenance.

In the present embodiment, the material of the reflector 30 includes, but is not limited to, aluminum profile and high-reflective plastic. The curved reflecting surface 321 is any one of a polished surface, a polished surface sprayed with white oil and a frosted surface sprayed with white powder, has a good reflecting effect, and can improve the utilization rate of light.

As shown in fig. 1, the lighting device 100 further includes a strip-shaped heat conductive member 40, a top cover 50, a side cover 60, and a fixing device 70.

The strip-shaped heat-conducting member 40 is disposed between the light source device 20 and the top cover 50, and the strip-shaped heat-conducting member 40 includes a heat-conducting member screw hole 41 penetrating through the strip-shaped heat-conducting member 40. The strip-shaped heat conducting part 40 comprises a heat conducting metal part and a high-heat-conductivity-coefficient glue layer, the strip-shaped heat conducting part 40 is mainly used for conducting heat of the lamp panel 21 out, the heat dissipation performance is good, and the service life of the LED lamp 22 is prolonged.

The top cover 50 is disposed above the light source device 20, and the top cover 50 includes a top cover screw hole 51 penetrating through the top cover 50. The side covers 60 are provided at both ends of the top cover 70, and detachably connected to the top cover 70. The top cover 50 and the side covers 60 are mainly used to wrap the light guide plate 10, the light source device 20, the reflector 30, and the strip-shaped heat conductive members 40, and prevent dust and the like from entering the inside of the lighting device 100, which may cause problems such as difficulty in cleaning.

The fixing means 70 is preferably a bolt that fixes the top cover 50, the strip-shaped heat conductive members 40, the light source device 20, the light guide plate 10, and the reflector 30 together in this order from top to bottom.

As shown in fig. 7, fig. 7 is a schematic view of an overall structure of the lighting device according to the embodiment of the present invention.

The present embodiment provides a lighting device 100, further comprising a driving device 80 and a connecting wire 90, wherein the driving device 80 is electrically connected to the light source device 20 (refer to fig. 1) through the connecting wire 90, so as to drive the light source device 20 to emit light, and the lighting device 100 emits soft and poetic light, which can be used for lighting and has an effect of decorating an environment.

As shown in fig. 1, the present embodiment provides a lighting device 100, the reflecting curved surface of the unique reflector 30 is adopted to realize flat pasting of the lamp beads (i.e. the light source device 20 is disposed above the light guide plate 10), thereby solving the technical problems that the lamp beads are easy to fall off due to the side pasting of the lamp beads, and the lamp strips are difficult to fix, effectively reducing the brightness of the light incident portion of the light guide plate 10, reducing the width of the opening area of the light guide plate 10, and further improving the lighting comfort of the lighting device 100 and making the modeling of the lighting device 100 more beautiful.

In other embodiments, as shown in fig. 8, fig. 8 is a top view of a light guide plate according to other embodiments of the present invention. The opening 12 of the light guide plate 10 of the illumination device 200 has a ring-shaped plan view, and two adjacent opening regions 124 are separated by a connecting block 1. The reflectors 30 are joined end to form a circular ring-shaped structure and are located in the open area 12, and the strip-shaped groove 323 also forms an oval ring.

The utility model provides a lighting device, the structure through fall into the income plain noodles that the light that comes from light source device into the light guide plate in two parts, the direct side direction of light L1 kicks into the income plain noodles to the light guide plate, thereby make the light guide plate near-end evenly luminous, light L2 kicks into to the reflection curved surface, the reflection curved surface reflects light L2 to the income plain noodles of light guide plate, and then the luminous homogeneity of light guide plate distal end, make lighting device beam angle bigger, light can spread to bigger scope, thereby make lighting device illumination scope bigger, the light distribution that sends is more even, and can improve illumination efficiency and luminous flux.

Further, the utility model discloses a light mode is gone into to reflective light guide plate, and light source device locates the light guide plate top, can avoid lamp pearl to damage and lamp strip installation difficulty scheduling problem to effectively improve the light guide plate homogeneity, go into the light angle through the structural adjustment of reflector and avoid curved surface or heterotypic light guide plate the problem of light and shade stripe to appear.

The lighting device provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present invention in its various embodiments.

Claims (14)

1. An illumination device, comprising: a light guide plate having at least one opening region formed at the middle thereof;

the light source device is arranged above the light guide plate and is opposite to the at least one opening area; and

the reflector is arranged below the light guide plate;

the reflector includes:

the bar-shaped body is arranged opposite to the light source device; and

the reflecting part is protruded out of the upper surface of the strip-shaped body and is positioned in the opening area;

the reflecting part comprises at least one reflecting curved surface which is arranged opposite to the inner side wall of the at least one opening area.

2. The lighting device of claim 1,

the inner side wall of the opening area is a light incident surface.

3. The lighting device of claim 2,

the reflecting curved surface is used for reflecting the light from the light source device into the light incident surface.

4. The lighting device of claim 1,

the included angle between the tangent line of any point of the reflecting curved surface and the inner side wall of the opening area corresponding to the reflecting curved surface is 0-90 degrees.

5. The lighting device of claim 1,

the reflecting curved surface is any one of a fine polished surface, a polished surface sprayed with white oil and a frosted surface sprayed with white powder.

6. A lighting device as recited in claim 1, wherein said reflector comprises

And the strip-shaped groove is recessed in the top surface of the reflecting part.

7. The lighting device of claim 1,

the material of the reflector comprises an aluminum profile or a high-reflection plastic.

8. The lighting device of claim 1,

the light guide plate is a paraboloid light guide plate, and the depression surface of the paraboloid light guide plate is elliptical.

9. The lighting device of claim 1,

a connecting block is arranged between the two opening areas; a clamping groove is arranged between the two adjacent reflecting parts at the head and the tail; the shape of the connecting block is consistent with that of the clamping groove.

10. The lighting device of claim 1,

the reflecting part is positioned at the end part of the strip-shaped body, and the end part of the reflecting part is U-shaped;

the shape of an opening area positioned at the edge of the light guide plate is matched with the shape of a reflecting part positioned at the end part of the strip-shaped body.

11. A lighting device as recited in claim 1, wherein said light source means comprises

A lamp panel; and

and the LED lamps are arranged on the lamp panel in an array mode.

12. A lighting device as recited in claim 1, further comprising

The top cover is arranged above the light source device; and

the side covers are arranged at two ends of the top cover.

13. A lighting device as recited in claim 12, further comprising

And the strip-shaped heat conducting piece is arranged between the light source device and the top cover.

14. A lighting device as recited in claim 13, further comprising

And a fixing device for fixing the top cover, the strip-shaped heat conducting member, the light source device, the light guide plate and the reflector together in sequence.

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