WO2022267980A1

WO2022267980A1 - Light guide element and lighting decoration device having same

Info

Publication number: WO2022267980A1
Application number: PCT/CN2022/099317
Authority: WO
Inventors: 胡安兴; 宋峻明
Original assignee: 科博达技术股份有限公司
Priority date: 2021-06-22
Filing date: 2022-06-17
Publication date: 2022-12-29
Also published as: CN113324229A

Abstract

A light guide element (2) and a lighting decoration device having same. A surface of the light guide element (2) comprises a light incident surface (2a), a light-emitting surface (2b) and an arc-shaped reflecting surface (2c), wherein the light incident surface (2a) and the light-emitting surface (2b) are respectively adjacent to two ends of the arc-shaped reflection surface (2c); the light guide element (2) is also provided with a light-isolating reflection structure, and the light-isolating reflection structure can prevent light incident on the light incident surface (2a) from being directly incident on the light-emitting surface (2b) and can reflect light incident on the light-isolating reflection structure from the interior of the light guide element (2); and light incident on the light incident surface (2a) can reach the light-emitting surface (2b) only after being reflected at least once by the arc-shaped reflection surface (2c). The lighting decoration device can ensure excellent uniformity of brightness and color of the light-emitting surface (2b) throughout the length direction, the required structure space is small, and the device is easily fabricated.

Description

Light guide element and lighting decoration device thereof

technical field

The invention relates to lighting decoration technology, in particular to a device for vehicle interior lighting and decoration.

Background technique

Vehicle lighting decoration devices, such as ambient lights, interior lights, etc., can be used for combined contour lighting and ambient lighting inside motor vehicles. Figure 1 exemplarily shows a schematic structural diagram of an existing lighting decoration device, as shown in Figure 1, It includes a light source 91 for emitting light, a strip-shaped light guide element 92 and a cover element (not shown in the figure), the light guide element 92 has a first plane and a second plane, wherein the first plane is a light incident surface, and the second plane is a light incident plane. The second plane is the light-emitting surface.

In the prior art, in order to meet the requirements of uniformity and multi-color mixed light, a light guide element 92 with a circular or square cross section is usually selected, and a light source 91 is arranged at one end of the light guide element, and the light emitted by the light source 91 passes through the light guide. The microstructure at the bottom of the light element 92 is reflected to the light-emitting surface, and the microstructure may be tooth-shaped or point-shaped. In order to achieve a better effect, light sources 91 are also arranged at both ends of the light guide element 92 .

In existing vehicle lighting and decoration devices, RGB light-emitting diodes (LEDs) are usually used as light sources at both ends. With communication and software applications, simple animations can be presented, such as breathing, gradients, multi-color scrolling, etc., but they cannot satisfy customers. The reason for the demand for intelligent atmosphere is that the existing vehicle lighting decoration devices have a single function and fewer options.

In the prior art, there are also light guide elements that use the reflection of the reflective cavity as interior lighting. In many application scenarios, it is necessary to set an external display panel on the outside, so as to separate the inside of the interior lamp from the outside. However, this method has the defects of many parts, complex processing procedures, and high cost. The color of the other areas of the car interior is usually inconsistent, and there are problems of process complexity (ie, mask or post-processing) and cost increase brought about by the interior painting process; if the external display panel and the car interior components are formed separately , then the number of components increases, and an additional installation structure is required to fix the two, which also means the complexity of the structure, the increase of the production process and the increase of the cost.

Contents of the invention

The technical problem to be solved by the present invention is to provide a light guide element and its lighting decoration device, which can ensure good brightness and color uniformity in all parts of the length direction of the light-emitting surface, and requires a small structural space and is easy to process.

According to a light guide element according to an embodiment of the present invention, the surface of the light guide element includes a light incident surface and a light exit surface; the feature is that the light guide element has a light isolation reflection structure, and the light isolation reflection structure can prevent light from entering the light incident surface. The light is directly incident on the light-emitting surface, and can reflect the light incident on the light-blocking reflection structure inside the light-guiding element; the surface of the light-guiding element also includes an arc-shaped reflecting surface, and the light-incident surface and the light-emitting surface are respectively adjacent to the arc-shaped reflecting surface two ends; the light incident on the light-incident surface can only reach the light-emitting surface after at least one reflection from the arc-shaped reflective surface.

A lighting decoration device according to an embodiment of the present invention includes a light source and the aforementioned light guide element; the extension direction of the light incident surface of the light guide element is consistent with the axial direction of the light guide element; the light source includes a plurality of light emitting units, a plurality of The light emitting unit faces the light incident surface, and a plurality of light emitting units are arranged in at least one row along a direction consistent with the axial direction of the light guide element.

The present invention has at least the following advantages:

1. The light guide element of the embodiment of the present invention has an arc-shaped reflective surface, the light-incident surface and the light-exit surface are respectively adjacent to the two ends of the arc-shaped reflective surface, and a light-blocking reflector is provided on the straight path between the light-entrance surface and the light-exit surface. Structure, through the above structure, in the limited structural space, the light can be reflected multiple times inside the light guide element to achieve the purpose of fully mixing the light, meet the requirements of uniformity and RGB multi-color mixing, and ensure the light source output Light does not directly reach the light-emitting surface without reflection;

2. The light sources of the lighting decoration device according to the embodiment of the present invention are arranged along the axial direction of the light guide element, which can realize multiple application scenarios such as multifunctional animation effects and human-computer intelligent interaction of the interior atmosphere decoration device. Large quantity, good luminous intensity and uniformity, can be used as intelligent multi-animation lighting or decoration device in the car;

3. The light guide element of the embodiment of the present invention is easy to process, and the size of the light guide element can be conveniently and flexibly adjusted according to the length of the optical path.

Figure overview

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 shows a schematic structural view of an existing lighting decoration device.

Fig. 2 shows a schematic perspective view of the three-dimensional structure of the lighting decoration device according to the first embodiment of the present invention.

Fig. 3 shows a schematic front view of the lighting decoration device according to the first embodiment of the present invention.

Fig. 4 shows a schematic side view of the lighting decoration device according to the first embodiment of the present invention.

5 to 10 respectively show schematic side views of lighting decoration devices according to second to seventh embodiments of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

See Figures 2 through 4. The lighting decoration device according to the first embodiment of the present invention includes a light source 1 and a light guide element 2 .

The light source 1 includes at least one light emitting unit 11 . In this embodiment, the light source 1 includes a plurality of light emitting units 11, and the light emitting units 11 are LEDs (Light Emitting Diodes). The LED 11 is arranged on a circuit board 12, and the circuit board 12 may be a rigid or flexible circuit board. In the case that the light source 1 has a plurality of LEDs 11 , these LEDs can emit monochromatic light or polychromatic light, and the light source 1 is a color-changeable light emitting module. Multiple LEDs 11 can generate mixed light, such as mixed white light.

The surface of the light guide element 2 includes a light incident surface 2a, a light exit surface 2b and an arc-shaped reflective surface 2c. The light incident surface 2a and the light exit surface 2b are respectively adjacent to two ends of the arc-shaped reflective surface 2c. In this embodiment, the light incident surface 2a is directly connected to one end of the arc-shaped reflecting surface 2c, and the light-emitting surface 2b is connected to the other end of the arc-shaped reflecting surface 2c through a transition surface 2d. In order to cooperate with better optical effects, skin texture or fine optical patterns can be added on the light incident surface 2a or the light exit surface 2b.

Optionally, the arc of the arc-shaped reflective surface 2c is greater than 180°, preferably, the arc of the arc-shaped reflective surface 2c is greater than or equal to 200°. Selecting the angle of the above-mentioned arc surface can make the light incident direction and the light exit direction staggered from each other, that is, they can be respectively arranged on the left side (or right side) and the upper side (or lower side) of the light guide element, thereby making the structure more compact . Moreover, by setting a large-area arc-shaped reflective surface, sufficient reflection optical path can also be provided so that the light can be fully diffused and mixed.

The light guide element 2 is also provided with a light-blocking reflection structure, which can prevent the light incident on the light-incident surface 2a from directly incident on the light-emitting surface 2b, and can reflect the light incident on the light-blocking reflection structure inside the light guide element. In this embodiment, the light-blocking reflective structure is an L-shaped groove 21 recessed from the surface of the light-guiding element 2 to the inside of the light-guiding element, and the two sides of the notch of the L-shaped groove 21 are respectively connected to the light incident surface 2a and the light exit surface 2b. The stepped surface formed by the L-shaped groove 21 can block and reflect the light directly directed from the light source to the light-emitting surface 2b.

The light incident on the light-incident surface 2a can reach the light-exit surface 2b after at least one reflection by the arc-shaped reflective surface 2c. Figure 4 shows the propagation paths of four light rays emitted by the light source 1. It can be seen from Figure 4 that some light rays reach the light-emitting surface 2b after one reflection of the arc-shaped reflective surface 2c and one reflection of the light-blocking reflection structure. Some light rays reach the light-emitting surface 2b after being reflected twice by the arc-shaped reflective surface 2c and once reflected by the light-blocking reflective structure. What is not shown in FIG. 4 is that some light incident on the light-incident surface 2a reaches the light-emitting surface 2b only after being reflected by the arc-shaped reflective surface 2c.

In this embodiment, the arc-shaped reflective surface 2c is a smooth surface (ie, a standard arc surface). The vertical distance between the center of circle of the arc-shaped reflective surface 2c and the light incident surface 2a is 0.7-1.2 times of the radius of the arc-shaped reflective surface 2c, preferably 0.8 to 0.99 times (that is, less than the radius of the arc-shaped reflective surface 2c ), so that the light incident surface 2a does not need to be set far away from the arc-shaped reflective surface 2c and the light exit surface 2b, which reduces the space required for installation and makes the structure more compact, and does not make the light of the light source directly enter the light exit surface 2b. Optionally, the vertical distance between the center of the arc-shaped reflective surface 2c and the light-emitting surface 2b is 1-2 times, preferably 1-1.5 times, the radius of the arc-shaped reflective surface 2c.

Further, the light incident surface 2a is perpendicular to the light exit surface 2b. At the light incident surface, the central axis of each light emitting unit 11 is on the same straight line as the center of the arc-shaped reflective surface 2c, and the centerline of the light-emitting surface 2b passes through the center of the arc-shaped reflective surface 2c. The above structure can make the distance between the light incident surface and the light exit surface close, and can cause most of the light emitted from the light source to enter the light exit surface after multiple reflections, thereby ensuring sufficient and uniform light mixing in a limited space.

In this embodiment, a plurality of light-emitting units 11 are facing the light-incident surface, and the plurality of light-emitting units are arranged in a row along the direction consistent with the axial direction of the light guide element, so that the multi-functional animation of the interior atmosphere decoration device can be realized. Effects and human-computer intelligent interaction and other application scenarios.

The light guide element 2 can be a part formed by high molecular polymer, or a part formed by optical glass. The shape of the light guide element 2 is not limited to a linear shape, and can also be set to other shapes according to space and effects. The cross-section of the light guide element 2 can also adopt a non-single shape, and a multi-shape combination type can be selected according to needs.

Optionally, in order to improve the brightness, the surface of the light guide element 2 is provided with a reflective layer on other areas (including the arc-shaped reflective surface 2c, etc.) The reflective layer can be obtained by surface treatment, such as metal coating, spraying reflective paint and so on.

In order to increase light reflectivity and realize controllable light, the arc-shaped reflective surface 2c may also be a surface with microstructures. In the second embodiment, as shown in Figure 5, the arc-shaped reflective surface 2c is composed of a plurality of micro-planes 21c connected in sequence, but its overall trend is still arc-shaped, and the angle of the micro-planes can be adjusted during the design process To control the direction of the light in the length and height directions of the light guide element. In the third embodiment, as shown in FIG. 6 , the arc-shaped reflective surface 2c is composed of a plurality of small arc-shaped surfaces 22c connected in sequence, which can also achieve the above optical effect.

In the second and third embodiments, the vertices of the cross-sectional outer contours of the arc-shaped reflective surface with microstructures are located on the same circle C0, which is shown in FIG. 6 . Similar to the first embodiment, the vertical distance between the center of the circle C0 and the light incident surface 2a is 0.7-1.2 times, preferably 0.8-0.99 times, the radius of the circle C0. The vertical distance between the center of the circle C0 and the light-emitting surface 2b is 1-2 times, preferably 1-1.5 times, the radius of the circle C0. The light incident surface 2a is perpendicular to the light exit surface 2b. At the light incident surface, the central axis of each light emitting unit 11 is on the same straight line as the center of the circle C0, and the centerline of the light exit surface 2b passes through the center of the circle C0.

In the fourth embodiment, as shown in FIG. 7, the light-shielding reflective structure is a light-shielding part 3 arranged inside the light guide element 2, and the light-shielding part 3 is a spacer made of metal or other materials. The injection molding process is integrated with the light guide element 2 .

Figure 8 and Figure 9 show the covering element 4 included in the lighting decoration device, in the fifth embodiment shown in Figure 8, the light guide element 2 and the covering element 4 are two parts independent of each other, shown in Figure 9 In the sixth embodiment shown, the light guiding element 2 and the covering element 4 are integrally formed. In order to efficiently utilize light and avoid waste, optical design can be done in conjunction with the bracket (not shown in the figure) of the light guide element 2 or the cover element 4 . The bonding surface of the bracket or covering element and the light guide element should be treated with high reflection, such as metal plating, spraying reflective paint, or using high reflectivity materials, or making some small optical reflection structures and then doing high reflection treatment. The use of the bracket or covering element 4 not only strengthens the fixation of the light guide element 2 but also enhances the use of light.

In the seventh embodiment, as shown in Fig. 10, the two ends of the arc-shaped reflective surface 2c are directly connected to the light incident surface 2a and the light exit surface 2b respectively.

The lighting decoration device in the embodiment of the present invention can be the lighting decoration device on the instrument panel under the windshield inside the car, or the lighting decoration device on the door panel and the floor inside the car.

The light guide element of the embodiment of the present invention is provided with an arc-shaped reflective surface, and the light-incident surface and the light-exit surface are respectively arranged close to the two ends of the arc-shaped reflective surface, so that the required structural space is very small. The structure prevents the light from the light source from directly hitting the light-emitting surface. The above structure can ensure sufficient optical path to achieve uniform light mixing, making the embodiments of the present invention more suitable for some scenes with strict space requirements, and can ensure that the light guide element has no light spots, and at the same time realize RGB in the light guide element. Polychromatic light mixing of LEDs.

Industrial Applicability

The light guide element and its lighting decoration device according to the embodiments of the present invention require a small structural space and are easy to process.

Claims

A light guide element, the surface of the light guide element includes a light incident surface and a light output surface; it is characterized in that the light guide element has a light isolation reflection structure, and the light isolation reflection structure can prevent the incident light from entering The light on the surface is directly incident on the light-emitting surface, and can reflect the light incident on the light-blocking and reflecting structure inside the light-guiding element;

The surface of the light guide element further includes an arc-shaped reflective surface, and the light-incident surface and the light-exit surface are respectively adjacent to two ends of the arc-shaped reflective surface;

The light incident on the light incident surface can reach the light exit surface only after at least one reflection by the arc-shaped reflective surface.
The light guide element according to claim 1, wherein the light incident surface is perpendicular to the light exit surface.
The light guide element according to claim 1 or 2, wherein two ends of the arc-shaped reflective surface are directly connected to the light incident surface and the light exit surface, respectively.
The light guide element according to claim 1 or 2, wherein the light-blocking reflective structure is an L-shaped groove concave from the surface of the light guide element to the inside of the light guide element, and the L The two sides of the notch of the shaped groove are respectively connected to the light-incident surface and the light-exit surface;

Alternatively, the light-shielding reflective structure is a light-shielding portion disposed inside the light guide element.
The light guide element according to claim 1 or 2, characterized in that the arc of the arc-shaped reflective surface is larger than 180°.
The light guide element according to claim 1 or 2, wherein the arc-shaped reflective surface is a smooth surface or a surface with microstructures.
The light guide element according to claim 6, characterized in that the vertices of the cross-sectional outer contours of the arc-shaped reflective surface with microstructures are located on the same circumference.
The light guide element according to claim 7, wherein when the arc-shaped reflective surface is a smooth surface, the vertical distance between the center of the arc-shaped reflective surface and the light incident surface is the arc 0.7-1.2 times the radius of the reflective surface;

When the arc-shaped reflective surface is a surface with microstructures, the vertical distance between the center of the circle and the light incident surface is 0.7-1.2 times the radius of the circle.
The light guide element according to claim 7, wherein when the arc-shaped reflective surface is a smooth surface, the vertical distance between the center of the arc-shaped reflective surface and the light-emitting surface is the arc-shaped 1-2 times the radius of the reflective surface;

When the arc-shaped reflective surface is a surface with microstructures, the vertical distance between the center of the circle and the light-emitting surface is 1-2 times the radius of the circle.
The light guide element according to claim 7, wherein when the arc-shaped reflective surface is a smooth surface, the center line of the light-emitting surface passes through the center of the arc-shaped reflective surface;

When the arc-shaped reflective surface is a surface with microstructures, the centerline of the light-emitting surface passes through the center of the circle.
The light guide element according to claim 1, wherein the surface of the light guide element is provided with a reflective layer in areas other than the light incident surface and the light exit surface, so as to increase light reflectivity.
The light guide element according to claim 1, wherein the extension direction of the light incident surface is consistent with the axial direction of the light guide element.
A lighting decoration device, characterized by comprising a light source and a light guide element according to any one of claims 1 to 11;

The extending direction of the light incident surface of the light guiding element is consistent with the axial direction of the light guiding element;

The light source includes a plurality of light emitting units facing the light incident surface, and the plurality of light emitting units are arranged in a row along a direction consistent with the axial direction of the light guide element.