TWI870272B - Vehicle optical lens - Google Patents

Abstract

The invention relates to a vehicle optical lens, comprising at least one light guide. The light guide has an incident end for introducing a light source and an emitting end for exporting light source. An emitting surface is arranged at the emitting end of the light guide, and at least two reflecting surfaces are positioned between the incident end and the emitting end. A concave portion is provided on the incident end, and a concave and convex incident surface consisting of multiple designed protrusions is provided at the bottom of the concave portion. When light source enters into the multiple protrusions of the concave and convex incident surface that the light source can be dispersed evenly to the reflective surface, and the light is refracted towards the emitting surface through the optical guidance effect of the reflecting surfaces, achieving an effect of increasing the brightness evenly on the emitting surface.

Description

Vehicle Optical Lenses

The present invention relates to a vehicle optical lens, and more particularly to an optical lens technology used in vehicle lighting equipment as its invention and application.

Generally, vehicles are designed to be equipped with lights with different functions on the front of the vehicle, and the light shape and light trace of each light must comply with the regulations. In the industry, an optical lens cover is used to cover the LED, so that the light emitted by the LED can produce various light shape layouts with better applicability after passing through the optical lens; for example, the characteristics of the headlights such as illumination, uniform light or lighting range can be improved.

The conventional "optical lens" design is such as Taiwan Patent Announcement No. M447967 "LED Optical Lens", No. M426535 "Vehicle LED Projection Lamp" ... etc.; or a conical optical lens (2) as shown in Figures 12 and 13, wherein the optical lens (2) is provided with a concave groove (21) at the end facing the light source group (O), the concave groove (21) wall forms a first curved surface (22), and the bottom surface is a second curved surface (23) convex from the groove bottom to the middle, and then a light emitting surface (24) composed of a plurality of concave and convex curved surfaces (241) is provided at the other end relative to the concave groove (21), and a reflective conical surface (25) is formed on the outer periphery between the light emitting surface (24) and the concave groove (21).

As shown in FIG. 12, when the light source group emits light into the concave groove (21), the optical lens (2) receives and radiates the light to the reflective cone (25) through the first curved surface (22) and the second curved surface (23), and the reflective cone (25) guides the radiated light to the light output surface (24), and then penetrates and diffuses outward from the concave-convex curved surface (241) on the light output surface (24) of the optical lens (2); since the light output surface (241) of the optical lens (2) is designed as a concave-convex curved surface, the diffused light is generated through the concave-convex curved surface (241) and the light is made uniform. As shown in the light domain diagram of FIG. 13, the light is evenly scattered, so that the light output surface (24) obtains better light uniformity. However, from the above light domain diagram, although the concave-convex curved surface (241) makes the central part of the optical lens (2) diffuse a uniform light domain, the divergent effect of the concave-convex curved surface (241) of the light output surface (24) causes the brightness of the light domain to be insufficient as it moves outwards. The degree of light attenuation is more obvious as it moves outwards. This is one of the problems that optical lens developers need to overcome urgently.

Therefore, the inventor, in view of this, has adhered to the rich design development and actual manufacturing experience of the relevant industry for many years, and has conducted research and improvement, and has provided a technology for vehicle optical lenses, which has good optical properties and better use value, in order to achieve the purpose of better practical value.

The main purpose of the present invention is to provide a vehicle optical lens, and more particularly, to provide an optical lens technology used in vehicle lighting equipment.

The main purpose and effect of the vehicle optical lens of the present invention are achieved by the following specific technical means:

The invention comprises at least one light guide, which has an incident end for introducing a light source and an output end for guiding out light. A light output surface is provided at the output end of the light guide, and at least two reflective surfaces are provided between the incident end and the output end. An inner recess is provided at the incident end, and a concave-convex light input surface is constructed at the bottom of the inner recess. The concave-convex light input surface is composed of a plurality of convex portions arranged in a designed manner. Thus, when the light source is incident on the plurality of convex portions of the concave-convex light input surface, the light can be evenly dispersed to the reflective surface, and the light can be folded toward the light output surface and projected out through the optical guiding effect of the reflective surface, thereby achieving the effect of increasing the light output surface and evenly improving the brightness.

In a preferred embodiment of the vehicle optical lens of the present invention, the concave-convex light incident surface has a plurality of convex portions arranged in a matrix, and there is a gap between two adjacent convex portions.

In a preferred embodiment of the vehicle optical lens of the present invention, the concave-convex light incident surface has a plurality of convex portions arranged in a matrix, and the convex portions are disposed continuously.

In a preferred embodiment of the vehicle optical lens of the present invention, the concave-convex light incident surface has a plurality of annular convex portions arranged from the inside to the outside.

In a preferred embodiment of the vehicle optical lens of the present invention, the concave-convex light incident surface has a plurality of convex portions arranged radially, and the convex portions are disposed continuously.

In a preferred embodiment of the vehicle optical lens of the present invention, the light emitting surface can be an arc-shaped light emitting surface with a curved surface design.

In a preferred embodiment of the vehicle optical lens of the present invention, the light emitting surface can adopt a stepped light emitting surface with end surfaces of different heights.

In order to make the technical content, purpose of the invention and the effects achieved by the present invention more complete and clear, they are described in detail below, and please refer to the disclosed drawings and figure numbers:

First, please refer to the first to fourth figures, which are cross-sectional and three-dimensional schematic diagrams of a vehicle optical lens of the present invention, which includes at least one light guide (1), wherein:

Each light guide (1) has an incident end (A) for introducing a light source and an output end (B) for guiding out light rays. The incident end (A) is provided with an inner recess (11). A concave-convex light incident surface (12) is constructed at the bottom of the inner recess (11). The concave-convex light incident surface (12) is composed of a plurality of convex portions (121). At least two reflecting surfaces (13) are provided from the opening end of the inner recess (11) toward the output end (B) [as shown in the second to fourth figures], and the ends of the at least two reflecting surfaces (13) are connected to a light output surface (14).

The present invention is specifically described by the following embodiments to further demonstrate the practical application of the present invention, but it is not intended to limit the scope of the present invention in any form. Please refer to the fifth figure. When the present invention is used, it is combined through a plurality of light guides (1) according to different lighting range requirements. The light guides (1) with different reflective surfaces (13) can be combined into an optical lens, such as a long strip optical lens; of course, an independent light guide (1) can also be used as an optical lens.

When the present invention is used, a light source (L) is arranged at the opening of the inner concave portion (11) of the incident end (A) of the light guide (1). The light source (L) injects light from the concave-convex light incident surface (12) of the inner concave portion (11). The light is evenly diffused in the light guide (1) from the concave-convex light incident surface (12), that is, the light is refracted and diffused in the light guide (1) through the plurality of convex portions (121) on the concave-convex light incident surface (12). When the refracted light enters the reflective surface (13) of the outer wall of the light guide (1), the light is vertically reflected by the reflective surface (13). The reflected light penetrates the light emitting surface (14) to form a concentrated light domain [as shown in the sixth figure]. This figure shows that the light on the light emitting surface (14) is uniform and the light domain is concentrated and brightened on the outside, and no light attenuation problem occurs.

Please refer to the seventh to ninth figures, the characteristic of the vehicle optical lens of the present invention is the concave-convex light incident surface (12) constructed at the bottom of the inner concave portion (11), and the plurality of convex portions (121) of the concave-convex light incident surface (12) can be implemented in a variety of states, such as:

In the first embodiment, the concave-convex light incident surface (12) is provided with a plurality of convex portions (121) arranged in a matrix, and there is a gap between two adjacent convex portions (121) [as shown in FIG. 7].

In the second embodiment, the concave-convex light incident surface (12) is provided with a plurality of convex portions (121) arranged in a matrix, and the convex portions (121) are arranged continuously [as shown in the second to fifth figures].

In the third embodiment, the concave-convex light incident surface (12) is provided with a plurality of annular convex portions (121) arranged from the inside to the outside [as shown in FIG. 8].

In the fourth embodiment, the concave-convex light incident surface (12) has a plurality of convex portions (121) arranged radially, and the convex portions (121) are disposed continuously [as shown in FIG. 9].

Furthermore, the light emitting surface of the present invention also has several feasible embodiments. As shown in FIGS. 10 to 11 , the light emitting surface (14) can be an arc-shaped light emitting surface with a curved surface design, or a stepped light emitting surface constructed with different heights.

However, the aforementioned embodiments or drawings do not limit the product structure or usage of the present invention. Any appropriate changes or modifications by a person having ordinary knowledge in the relevant technical field should be deemed to be within the patent scope of the present invention.

From the above description of the use and implementation of the present invention, it can be seen that compared with the existing technical means, the present invention mainly has the following advantages:

1. The vehicle optical lens of the present invention diffuses light evenly in the light guide through the convex part on the concave-convex light incident surface, and then focuses and reflects the light, so that the light output surface emits concentrated and brightened light, so that there will be no light attenuation problem around the light output surface.

2. As mentioned above, the present invention has a variety of convex shapes and light-emitting surface designs, which can produce different light patterns in accordance with the body design to achieve a more practical effect.

In summary, the embodiments of the present invention can achieve the expected effects of use, and the specific structure disclosed therein has not been seen in similar products, nor has it been disclosed before the application. It fully complies with the provisions and requirements of the Patent Law. Therefore, an application for an invention patent is filed in accordance with the law, and we sincerely request your review and grant of the patent. We would be grateful for the convenience.

The present invention 1: light guide 11: inner concave portion 12: concave-convex light incident surface 121: convex portion 13: reflection surface 14: light emitting surface A: incident end B: emitting end L: light source prior art 2: optical lens 21: concave groove 22: first curved surface 23: second curved surface 24: light emitting surface 241: concave-convex curved surface 25: reflection cone O: light source assembly

Figure 1: Schematic diagram of the cross-section of the present invention. Figure 2: Schematic diagram of the three-dimensional appearance of the optical lens with two reflective surfaces of the present invention [continuous matrix-arranged convex parts]. Figure 3: Schematic diagram of the three-dimensional appearance of the optical lens with three reflective surfaces of the present invention [continuous matrix-arranged convex parts]. Figure 4: Schematic diagram of the three-dimensional appearance of the optical lens with four reflective surfaces of the present invention [continuous matrix-arranged convex parts]. Figure 5: Schematic diagram of the long strip optical lens of the present invention [continuous matrix-arranged convex parts]. Figure 6: Light domain diagram of the present invention. Figure 7: Schematic diagram of the optical lens with matrix-arranged convex parts of the present invention. Figure 8: Schematic diagram of the optical lens with annular convex parts of the present invention. Figure 9: Schematic diagram of the optical lens with continuous radially arranged convex parts of the present invention. Figure 10: Schematic diagram of the optical lens with curved light-emitting surface of the present invention. Figure 11: Schematic diagram of the optical lens with stepped light-emitting surface of the present invention. Figure 12: Schematic diagram of the cross-section of the prior art. Figure 13: Light domain diagram of the prior art.

1: Light guide

11: Concave part

12: Concave and convex light-entering surface

121: convex part

13: Reflective surface

14: Bright surface

A: Incident end

B: Output end

L: Light source

Claims (7)

A vehicle optical lens includes at least one light guide, wherein: Each light guide has an incident end for introducing a light source and an output end for guiding out light rays, an inner concave portion is provided at the incident end, a concave-convex light incident surface is constructed at the bottom of the inner concave portion, and the concave-convex light incident surface is composed of a plurality of convex portions, and at least two reflective surfaces are provided from the opening end of the inner concave portion to the output end, and the ends of the at least two reflective surfaces are connected to a light output surface. The vehicle optical lens as described in claim 1, wherein the concave-convex light incident surface has a plurality of convex portions arranged in a matrix, and there is a gap between two adjacent convex portions. The vehicle optical lens as described in claim 1, wherein the concave-convex light incident surface has a plurality of convex portions arranged in a matrix, and the convex portions are disposed continuously. The vehicle optical lens as described in claim 1, wherein the concave-convex light incident surface has a plurality of annular convex portions arranged from the inside to the outside. The vehicle optical lens as described in claim 1, wherein the concave-convex light incident surface has a plurality of convex portions arranged radially, and the convex portions are disposed continuously. A vehicle optical lens as described in any one of claims 1 to 5, wherein the light-emitting surface can be an arc-shaped light-emitting surface with a curved surface design. A vehicle optical lens as described in any one of claims 1 to 5, wherein the light-emitting surface can adopt a stepped light-emitting surface with end faces of different heights.