CN112325187A

CN112325187A - Light guide type lighting decoration device

Info

Publication number: CN112325187A
Application number: CN202011077445.1A
Authority: CN
Inventors: 胡安兴
Original assignee: Keboda Technology Co ltd
Current assignee: Keboda Technology Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-02-05
Also published as: WO2022073421A1

Abstract

The invention discloses a light guide type illumination decoration device, which comprises a shell, a light source and a light guide channel, wherein the light source is arranged on the shell; the shell is provided with an inner cavity and a light outlet, and the light source and the light guide channel are respectively arranged in the inner cavity. The light guide channel is formed by a gap between the light guide cover plate and the light guide bottom plate, and a light guide medium of the light guide channel is air; the light guide channel is provided with a light incident port and a light emergent port which are respectively close to the light source and the light emergent port; light emitted by the light source is emitted into the light guide channel through the light incident port, reflected by the inner side surface of the light guide cover plate and the inner side surface of the light guide bottom plate and then transmitted to the light outlet. The invention has low manufacturing cost and high light utilization efficiency, and can fully mix multicolor light emitted by the light source.

Description

Light guide type lighting decoration device

Technical Field

The invention relates to the technology of lighting decoration.

Background

Common components for vehicle interior lighting and trim (e.g., mood lights) typically include a light source for emitting light and a ribbon-shaped light directing element. As shown in fig. 1, the existing illumination decoration apparatus as an example includes a housing 1, a light source 2, and a light guide member 3. The housing 1 has an inner cavity 11 and a light exit port 12, the light source 2 and the light guide element 3 are respectively disposed in the inner cavity 11, and the light guide element 3 has an incident surface 3a that receives light incident from the light source 2 and an exit surface 3b that directs the incident light to the light exit port 12. The housing 1 is composed of a first housing part 1a and a second housing part 1b, the first housing part 1a and the second housing part 1b are connected to each other and together enclose an inner cavity 11. The light source 2 includes one or more light emitting units 21, and the light emitting units 21 are disposed on a circuit board 22. The light emitting unit 21 is typically an LED. Light guide element 3 includes transparent light guide portion 31a and diffuse light guide portion 32a, and light incident surface 3a is provided in transparent light guide portion 31a and light emitting surface 3b is provided in diffuse light guide portion 32 a.

The light guide element 3 is mainly used to meet the requirements of light uniformity or multi-color mixing, and is usually made of a high polymer material, which has a small selectable range and is expensive. Meanwhile, the high molecular polymer has extremely high requirements (for example, high surface polishing is required) on a forming die so as to achieve the purpose of reducing optical loss. Even so, the light still is great at the partial loss of diffusion light guide especially in the conduction, and the light efficiency is low, and effective light utilization ratio is only about 10%.

In order to overcome the above-mentioned drawbacks, the new solution uses a bowl-shaped condenser 4 instead of the existing light guiding element 3, as shown in fig. 2. The bowl-shaped condenser 4 is made of non-transparent material and has a reflective metal layer on the surface, or is directly made of white material with high reflectivity. The bowl-shaped condenser 4 uses air as a light guide medium, the structure has a large opening, and the shape of the reflecting bowl follows the principle of parabola. When the desired light emitting area is long, several reflecting bowls are arranged along the length of the bowl-shaped concentrator 4 (perpendicular to the paper in fig. 2). However, since each of the reflecting bowls of the bowl-shaped concentrator 4 emits substantially parallel outgoing light, there may be darker regions between the illuminated regions of the respective reflecting bowls in the longitudinal direction, i.e. there may be some non-uniformity in the longitudinal direction, which is disadvantageous in some cases. Secondly, since the bowl-shaped condenser 4 needs to be integrally formed, in order to ensure the feasibility of mold processing and facilitate demolding, the height of the light exit port of the bowl-shaped condenser 4 cannot be designed to be too small (generally more than 3 times the height of the light exit port 12), which results in more light waste at the opening and low light utilization rate. In addition, the bowl-shaped condenser 4 mainly reflects light emitted from the light source by using the parabolic reflection area, and if the height of the light exit port of the reflection bowl of the bowl-shaped condenser 4 is reduced, the parabolic reflection area is also reduced, light reflected to the light exit port by the parabolic reflection area is reduced, and the planar reflection area connected to the parabolic reflection area may face the light source, so that a large amount of light is reflected to the entrance of the bowl-shaped condenser 4, and the brightness at the light exit port of the bowl-shaped condenser 4 is not effectively improved.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an illuminating and decorating device which has low manufacturing cost, small light loss and high light utilization efficiency and can fully mix multicolor light emitted by a light source.

The light guide type illumination decoration device comprises a shell, a light source and a light guide channel; the shell is provided with an inner cavity and a light outlet, and the light source and the light guide channel are respectively arranged in the inner cavity; the light guide channel is provided with a light incident port and a light emergent port which are respectively close to the light source and the light emergent port; light emitted by the light source is emitted into the light guide channel through the light incident port, reflected by the inner side surface of the light guide cover plate and the inner side surface of the light guide bottom plate and then transmitted to the light outlet.

In the light guide type illumination decoration device, the light exit port faces the light exit port, the height of the light exit port is 0.8 to 2 times of the height of the light exit port, and the length of the light exit port is 0.8 to 1.2 times of the length of the light exit port.

In the light guide type illumination decoration device, the height of the light exit port is 1 to 1.2 times of the height of the light exit port, the length of the light exit port is 1 to 1.1 times of the length of the light exit port, and the light exit port completely surrounds the projection of the light exit port on the light exit port.

The invention has at least the following advantages:

1. the light guide channel of the embodiment of the invention utilizes air with low cost as a light guide medium, and compared with the existing high molecular polymer light guide element, the light guide channel has the advantages that the requirement on the precision of a mold is reduced, the manufacturing cost is reduced, meanwhile, the requirement on the assembly tolerance is lower, the manufacturing and assembly processes are simplified, in addition, the light waste caused by optical refraction of the high molecular polymer medium is avoided, and the light loss is reduced;

2. according to the light guide channel provided by the embodiment of the invention, light cannot be limited in the right front of the light reflecting bowl, so that the uniformity of the light along the length direction is higher; and can let the multicolor light that the polychrome LED (such as RGB LED) sends mix fully among them, realize the homogeneous light of arbitrary color, and then realize the good display effect;

3. the shape design of the light guide channel is flexible and changeable, the light guide channel can be freely selected and matched according to the optical effect requirement, meanwhile, the sizes of a light incident port and a light emergent port of the light guide channel are changeable, and the optical path distance from the light incident port to the light emergent port can also be flexibly designed according to the optical effect requirement, so that the light guide channel is suitable for different requirements;

4. the light guide cover plate and the light guide bottom plate of the light guide channel are respectively processed and molded, the processing requirement on the die is low, and the demolding is simple; the size of the light guide channel formed by the light guide cover plate and the light guide bottom plate can be adjusted at will, so that the height of the light exit port of the light guide channel can be controlled to be 0.8-2 times of the height of the light exit port, the length of the light exit port is 0.8-1.2 times of the length of the light exit port, the light at the light exit port is less in waste, the light emitted by the light source is basically and completely gathered in the light guide channel and guided to the light exit port, other exits do not exist, the utilization rate of the LED light is greatly improved, and the light output from the light exit port has stronger light intensity.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a conventional illuminated decoration apparatus.

Fig. 2 is a schematic cross-sectional view of another prior art illuminated decorative apparatus.

Fig. 3 is a schematic cross-sectional view illustrating a light guide type illumination decoration apparatus according to an embodiment of the invention.

Fig. 4 is a schematic structural diagram of a light guide cover plate and a light guide base plate according to an embodiment of the invention.

Fig. 5 shows a schematic cross-sectional view of a light guiding cover plate and a light guiding base plate according to another embodiment of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

Fig. 3 is a schematic cross-sectional view illustrating a light guide type illumination decoration apparatus according to a first embodiment of the present invention. Fig. 4 is a schematic structural diagram of a light guide cover plate and a light guide base plate according to an embodiment of the invention. Please refer to fig. 3 and 4. The light guide type illumination decoration device according to the first embodiment of the present invention includes a housing 1, a light source 2, a non-transparent light guide cover plate 51 and a non-transparent light guide base plate 52.

The housing 1 has an inner cavity 11 and a light outlet 12. In the present exemplary embodiment, the housing 1 is composed of a first housing part 1a and a second housing part 1b, which are connected to one another and together enclose an interior 11. The first housing part 1a and the second housing part 1b may be connected by a snap connection or a heat staking connection, or by separate connecting elements (e.g., screws), or the like. The first housing part 1a and the second housing part 1b may be made of the same plastic or different plastics.

The gap between the light guiding cover plate 51 and the light guiding base plate 52 forms the light guiding channel 6. The light guide cover plate 51 and the light guide base plate 52 are formed by processing respectively and then combined to form the light guide channel 6. The light source 2 and the light-conducting channel 6 are both arranged in the inner cavity 11. The light-conducting medium of the light-conducting channel 6 is air. The light guide channel 6 has a light entrance port 61 and a light exit port 62, and the light entrance port 61 and the light exit port 62 are respectively close to the light source 2 and the light exit port 12.

Light emitted from the light source 2 is incident into the light guide channel 6 through the light incident port 61, and is reflected by the light guide cover plate inner side surface 51a and the light guide base plate inner side surface 52a, and then propagates to the light exit port 12. The light entering the light guide channel 6 will reach the light outlet 12 only after at least one reflection from the inner side surface 51a of the light guide cover plate and one reflection from the inner side surface 52a of the light guide base plate (i.e., at least two reflections in the light guide channel 6), which is beneficial to the full and uniform mixing of the multi-color light therein, and the light can be further diffused in the length and height directions of the light guide path, so that the brightness uniformity is higher in the length and height directions of the light outlet. The dotted lines and arrows in fig. 3 schematically show the direction of light propagation.

As required, the inner walls of the light guide channel 6 (i.e. the inner side surface 51a of the light guide cover plate and the inner side surface 52a of the light guide base plate) may be smooth or provided with optical patterns, and the inner walls of the light guide channel 6 may also be provided with a reflective layer, for example, a sprayed or plated reflective metal layer, such as a metal layer of aluminum, chromium, etc., so as to improve the utilization rate and brightness of light.

Alternatively, the light guide cover plate inner side surface 51a and the light guide base plate inner side surface 52a located within the light guide channel 6 extend in the same tendency. For example, if the light guide cover inner side surface extends along a straight line, and the light guide base plate inner side surface 52a also extends along a straight line, and if the light guide cover inner side surface 51a is curved, the light guide base plate inner side surface 52a is also curved, and the two may be parallel, or may be slightly different in terms of extension angle or curvature. This ensures that the optical paths of most of the light are substantially the same, which is advantageous for improving the uniformity of the brightness at the light exit.

In this embodiment, the light guide channel 6 has an arc-shaped bending shape. The arc-shaped bent light guide channel 6 comprises an arc-shaped section 6a and a straight line section 6b, and one end of the arc-shaped section 6a is connected with one end of the straight line section 6 b; the light entrance port 61 is located at the other end of the arc-shaped section 6a, and the light exit port 62 is located at the other end of the straight section 6 b. The arcuate section 6a may be circular, parabolic, etc. in shape. In other embodiments, the light-conducting channels 6 are undulated in shape. By setting the light guide channel 6 to be non-linear, the multi-color light mixing and uniformity effects can be improved, and light is prevented from directly reaching the light outlet 12 without being reflected. The bending angle of the bent light guide channel 6 and the width and height of the light guide channel can be flexibly adjusted according to optical requirements. If the light guide channel 6 is formed in a linear shape, the light guide channel 6 directly transmits the incident light of the light source 2 to the light outlet 12, and the number of the light emitting units 21 can be adjusted or optical patterns or dermatoglyphs can be added to the inner and outer sides of the light outlet portion 7.

Optionally, the light exit port 62 faces the light exit port 12, and the height h1 of the light exit port 62 is 0.8-2 times the height of the light exit port 12 and the length is 0.8-1.2 times the length of the light exit port 12, so that the requirements of uniformity and multi-color mixing can be met and the light utilization ratio can be improved compared with the prior art. Preferably, the height h1 of the light exit port 62 is 1-1.2 times the height of the light exit port 12, and the length L1 of the light exit port 62 is 1-1.1 times the length of the light exit port 12. As shown in fig. 5, a projection 12a of the light exit port 12 on the light exit port 62 is shown by a dotted line. The light exit opening 62 completely surrounds the projection of the light exit opening 12 onto the light exit opening 62. Since the light exit port 62 is larger than the light exit port 12, the requirement for assembly tolerance is reduced, the manufacturing and assembly process is simplified, and the side surface of the light guide channel 6 does not need to be closed, i.e., the light guide cover plate 51 and the light guide base plate 52 may not be connected to each other on the side surface, which can further reduce the processing difficulty and cost.

In other embodiments, the light guide cover plate 51 and the light guide base plate 52 may be connected to each other. For example, one side of the light guide cover plate 51 is connected to one side of the light guide bottom plate 52 through a first side plate (not shown), and the other side of the light guide cover plate 51 is connected to the other side of the light guide bottom plate 52 through a second side plate (not shown), so as to seal two sides of the light guide channel 6.

In the present embodiment, the light source, the light guide cover plate 51 and the light guide bottom plate 52 are fixedly connected to the first housing portion 1a and/or the second housing portion 1b, respectively, and the fixed connection manner includes, but is not limited to, a snap connection or an interconnection via a separate connection element (e.g., a screw). In order to avoid the change of the light emitting effect caused by the movement or installation position deviation of the light source 2 relative to the light guide cover plate 51 and the light guide base plate 52, further, the light guide type illumination decoration device is further provided with a positioning structure, and the positioning structure is used for fixing the relative position relation of the light source 2, the light guide cover plate 51 and the light guide base plate 52. Preferably, the light source, the light guide cover plate 51 and the light guide bottom plate 52 are all fixedly connected to the same one of the first housing portion 1a or the second housing portion 1b (for example, all fixedly connected to the second housing portion 1 b), and the light source 2 is directly positioned and fixed with the light guide cover plate 51 and the light guide bottom plate 52 by a positioning element or a positioning structure. If the light source 2, the light guide cover plate 51 and the light guide base plate 52 are respectively connected to the housing, the positional relationship between the light source 2 and the light guide channel 6 may be different in different products due to assembly tolerance, and thus, the difference in light emitting effect may be caused between different products.

In other embodiments, the light guide cover plate 51 and/or the light guide base plate 52 are formed integrally with the housing 1.

In the present embodiment, the light guide type illumination decoration device further includes a light emitting portion 7, and the light emitting portion 7 is disposed between the light emitting port 62 and the light emitting port 12 of the light guide channel, and is connected to the second housing portion 1b through some element, such as glue, a mounting structure, and the like. The light exit portion 7 has a light entrance surface 7a that receives the light incident from the light exit port 62 and a light exit surface 7b that exits the incident light, and the light exit surface 7b faces the light exit port 12. The light emitting part 7 can more uniformly mix the incident light or display a specific pattern, thereby achieving a better optical effect. The light emitting portion 7 is not essential and may be selected according to the light emitting effect.

In another embodiment, the second housing portion 1b is integrally formed with the light exit portion 7. In a specific embodiment, the second housing portion 1b and the light exit portion 7 are integrally formed by injection molding. The first housing part 1a and the second housing part 1b are both made of non-transparent plastic; the outer surfaces of the first housing part 1a and the second housing part 1b can be sprayed with liquid solvents of different colors according to requirements so as to meet requirements of color, luster and the like of interior trim, the liquid solvents are transparent solvents or non-transparent colored solvents, and multiple layers of liquid solvents can be sprayed. The light-emitting portion 7 is made of a colorless transparent plastic and has scattering particles, pores, skin stripes, optical patterns, and the like, and the light-emitting portion 7 may also be made of a translucent plastic such as a diffusing plastic. Through forming light-emitting portion and casing an organic whole, simplified the installation, reduced the tolerance and accumulated to better optical effect has been reached.

In other embodiments, the first housing portion 1a and the light exit portion 7 are connected to each other or integrally formed. Alternatively, the light emitting portion 7 is connected to the light guide cover 51 or the light guide base plate 52, and then fixedly connected to the first housing portion 1a or the second housing portion 1b in a sub-assembly manner.

In the present embodiment, the light source 2 includes a plurality of light emitting units 21, the light emitting units 21 are disposed on a circuit board 22, and the circuit board 22 may be a rigid or flexible circuit board. The above-mentioned "several" means one or more. In this embodiment, the light emitting unit 21 is a plurality of LEDs, the plurality of LEDs are arranged in a row, and the plurality of LEDs are physically and electrically connected. The plurality of LEDs may emit monochromatic light or polychromatic light, and when the plurality of LEDs emit light of different colors, mixed light, such as mixed white light, may be generated.

Further, each light emitting unit 21 partially protrudes into the light incident port 61 of the light guide channel 6.

The light guide type illumination decoration device of the embodiment can be arranged between the windshield and the instrument panel of the automobile.

The light guide channel of the embodiment of the invention utilizes air with low cost as a light guide medium, compared with the existing high polymer light guide element, the light guide channel has the advantages of reducing the requirement on the precision of a mold, reducing the manufacturing cost, simultaneously having lower requirement on assembly tolerance, simplifying the manufacturing and assembling process, avoiding the light waste of the high polymer medium caused by optical refraction, reducing the light loss, and adopting a smaller number of light emitting units as the light source under the condition of achieving the same brightness, thereby reducing the manufacturing cost.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A light guide type illumination decoration device comprises a shell, a light source and a light guide channel; the light guide type illumination decoration device is characterized in that the light guide type illumination decoration device comprises a non-transparent light guide cover plate and a non-transparent light guide bottom plate, the light guide channel is formed by a gap between the light guide cover plate and the light guide bottom plate, and a light guide medium of the light guide channel is air; the light guide channel is provided with a light incident port and a light emergent port, and the light incident port and the light emergent port are respectively close to the light source and the light emergent port;

and light emitted by the light source is emitted into the light guide channel through the light incident port, reflected by the inner side surface of the light guide cover plate and the inner side surface of the light guide bottom plate and then transmitted to the light outlet.

2. The light guide illumination decoration device according to claim 1, wherein the light exit port faces the light exit port, and the height of the light exit port is 0.8 to 2 times the height of the light exit port, and the length of the light exit port is 0.8 to 1.2 times the length of the light exit port.

3. The light guide illumination decoration device according to claim 1, wherein the height of the light exit port is 1 to 1.2 times the height of the light exit port, the length of the light exit port is 1 to 1.1 times the length of the light exit port, and the light exit port completely surrounds the projection of the light exit port on the light exit port.

4. A light-guide illuminated decorative apparatus as recited in claim 1, wherein the light-guide channel is non-linear in shape.

5. The light guide type illumination decoration device according to claim 1 or 4, wherein the light guide channel is in the shape of an arc bend or a wave;

the arc-shaped bent light guide channel comprises an arc-shaped section and a straight line section, and one end of the arc-shaped section is connected with one end of the straight line section; the light incident port is located at the other end of the arc-shaped section, and the light emergent port is located at the other end of the straight section.

6. A light-guide illuminated decorative device as claimed in claim 1, wherein the inner wall of the light-guide channel is smooth, or is provided with optical patterns, or is provided with a reflective layer.

7. A light guide illuminated emblem device as defined in claim 1, wherein the light guide illuminated emblem device comprises positioning structures for fixing the relative positional relationship of the light source, the light guide cover plate and the light guide base plate.

8. A light-guide illuminated decorative device as claimed in claim 1 or 7, wherein the light-guide cover plate and/or the light-guide base plate are fixedly connected to the housing or are formed integrally with the housing.

9. A light guide illumination decoration device according to claim 1, characterized in that the light guide illumination decoration device includes a light exit portion which is provided between the light exit port of the light guide channel and the light exit port, and is connected to or integrally formed with the housing, the light guide cover plate, or the light guide bottom plate;

the light emitting part is provided with a light incident surface for receiving the light emitted from the light emitting port and a light emitting surface for emitting the emitted light, and the light emitting surface is opposite to the light emitting port.

10. A light-guide illuminated decorative device as recited in claim 9, wherein the housing is made of a non-transparent plastic; the light-emitting part is made of a colorless transparent material or a diffusion material.

11. The light-guide illuminated trim apparatus of claim 1, wherein the housing is comprised of a first housing portion and a second housing portion, the first housing portion and the second housing portion being connected to one another and collectively defining the interior cavity.

12. A light-guide illuminated trim apparatus as defined in claim 1, wherein the light source comprises a plurality of light-emitting units; each of the light emitting units partially protrudes into the light incident port of the light guide channel.

13. The light-guide illuminated trim apparatus of claim 1, wherein the light-guide cover sheet inner side surface and the light-guide base sheet inner side surface within the light-guide channel extend in the same direction.