Total reflection structure and optical module and vehicle light using the same

Abstract

The present invention discloses a total reflection structure and an optical module and a vehicle lamp using the same, comprising: a base surface formed by stretching a base line as a parabola and a plurality of reflection grooves formed in parallel on the base surface; the plurality of reflection grooves are connected to each other to form a tooth shape; each reflection groove comprises two groove walls connected by bending, and the angle formed by the two groove walls is 90±5°; and the two groove walls of each reflection groove can collimate the incident light along the axis direction of the parabola after two total reflections through the two groove walls. The present invention can improve the uniformity of light divergence while improving the light efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamps, and in particular to a total reflection structure and an optical module and a vehicle lamp using the same. Background Art

[0002] For lighting fixtures used in vehicles, it is generally necessary to use a reflective surface to fully reflect and collimate the light. However, in traditional reflective thick-walled parts, it is inevitable that the reflective surface in some areas cannot meet the internal total reflection conditions. When the light hits the reflective surface 100, the incident angle of the light is small and total reflection cannot occur, resulting in almost all the light passing through the reflective surface and low light efficiency. Therefore, actual research has found that reflective thick-walled parts with this structure have defects such as low light efficiency, small light range, and light type that is gathered and cannot be diffused.

[0003] See also Figure 1 As shown in the lighting effect diagram of a flat reflective surface without a special structure, when the light hits the upper half of the reflective surface, the incident angle of the light is large and total reflection cannot occur, resulting in almost all the light passing through the reflective surface and low lighting efficiency.

[0004] In order to improve the light effect and expand the light range of the light, multiple reflective structures are generally used in coordination. Although the light effect can be optimized, the coordination of multiple reflective structures will inevitably increase the volume of the overall optical module, which will cause the volume of the headlights using such optical modules to increase, and thus fail to meet the vehicle's demand for miniaturized headlights. Therefore, considering the current pursuit of miniaturization and aesthetics in the field of headlights, while also taking into account the effect of improving the light effect and expanding the light range of the light, it is necessary to optimize the reflective structure used in the optical module. Summary of the invention

[0005] The first object of the present invention is to provide a total reflection structure to solve the technical problem of improving the light efficiency and the uniformity of light divergence.

[0006] A second objective of the present invention is to provide an optical module to solve the technical problem of improving the light efficiency while improving the uniformity of light divergence.

[0007] A third object of the present invention is to provide a vehicle lamp to solve the technical problem of improving the light efficiency while improving the uniformity of light divergence.

[0008] The total reflection structure of the present invention is achieved in this way:

[0009] A total reflection structure, comprising: a base surface formed by stretching a base line as a parabola and a plurality of reflection grooves formed in parallel on the base surface; and the plurality of reflection grooves are connected to each other to form a tooth shape;

[0010] Each reflective groove comprises two groove walls connected by bending, and the angle formed by the two groove walls is 90±5°; and

[0011] The two groove walls of each reflection groove can collimate the incident light and emit it along the axis direction of the parabola after it is totally reflected twice by the two groove walls.

[0012] In an optional embodiment of the present invention, the angles formed by two groove wall surfaces of the multiple reflection grooves included in the total reflection structure are the same.

[0013] In an optional embodiment of the present invention, the angles formed by two groove walls of the multiple reflection grooves included in the total reflection structure are all 90°.

[0014] In an optional embodiment of the present invention, the angles formed by two groove wall surfaces of the plurality of reflection grooves included in the total reflection structure are different.

[0015] In an optional embodiment of the present invention, the cross-section of the angle formed by the two groove walls of each of the reflective grooves is V-shaped.

[0016] In an optional embodiment of the present invention, the cross-section of the angle formed by the two groove walls of each of the reflective grooves is in an arc shape.

[0017] The optical module of the present invention is implemented as follows:

[0018] An optical module comprises: the total reflection structure, a light incident surface suitable for coupling with the total reflection structure, and a light source.

[0019] In an optional embodiment of the present invention, the light incident surface is formed by rotating the cross-sectional profile of the concentrator, and the rotation axis is a line segment passing through the center of the light source and parallel to the total reflection structure.

[0020] In an optional embodiment of the present invention, the light incident surface is formed by rotating the cross-sectional profile of the Fresnel, and the rotation axis is a line segment passing through the center of the light source and parallel to the total reflection structure.

[0021] The vehicle lamp of the present invention is realized in this way:

[0022] A vehicle lamp comprises: at least one of the above-mentioned optical modules.

[0023] By adopting the above technical solution, the present invention has the following beneficial effects: the total reflection structure of the present invention and the optical module and vehicle lamp using the same, through forming a plurality of reflection grooves on the base surface, and the two groove walls of each reflection groove can collimate the incident light through the two groove walls twice and then emit it along the axis direction of the parabola. In this case, the light efficiency can be improved by the two total reflections of the light in each reflection groove. In addition, the reflection groove can collimate and disperse the light with strong energy perpendicular to the light source. Through this structure, part of the light can be transferred to the outside through refraction, reducing the brightness of the reflection surface corresponding to the middle part, preventing the light from being too concentrated, and helping to improve uniformity, that is, the strong light concentrated directly below the light source can be dispersed through refraction, making the light output surface more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the projection structure of light on a reflective surface in the prior art;

[0025] Figure 2 is a schematic diagram of the structure of the optical module of the present invention from a first viewing angle;

[0026] Figure 3 is a schematic diagram of the structure of the optical module of the present invention from a second viewing angle;

[0027] Figure 4 It is a schematic diagram of the structure of a plurality of reflective grooves and a light incident surface of the optical module of the present invention from a first viewing angle;

[0028] Figure 5 It is a second viewing angle structural schematic diagram of a plurality of reflective grooves and a light incident surface of the optical module of the present invention;

[0029] Figure 6 It is a schematic diagram of the optical module of the present invention in which the light incident surface is a Fresnel pattern rotating structure;

[0030] Figure 7 It is a schematic diagram of the projection structure of light corresponding to the structure of the reflection groove of the optical module of the present invention;

[0031] Figure 8 It is a schematic structural diagram of the rotating axis of the optical module of the present invention.

[0032] In the figure: light incident surface 1, reflection groove 2, light source 3. DETAILED DESCRIPTION

[0033] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0034] Embodiment 1:

[0035] See also Figures 2 to 8As shown, this embodiment provides a total reflection structure, including: a base surface formed by stretching a base line as a parabola and a plurality of reflection grooves 2 formed in parallel on the base surface; and the plurality of reflection grooves 2 are connected to each other to form a tooth shape.

[0036] Specifically, each reflecting groove 2 includes two groove walls connected by bending, and the angle formed by the two groove walls is 90±5°; under such a structure, the two groove walls of each reflecting groove 2 can reflect the incident light twice through the two groove walls and then collimate it along the axis direction of the parabola.

[0037] Based on the above structure, in an optional implementation, the angles formed by the two groove walls of the multiple reflection grooves 2 included in the total reflection structure are the same. Here, in a preferred implementation, the angles formed by the two groove walls of the multiple reflection grooves 2 included in the total reflection structure are all 90°.

[0038] In another optional implementation, the total reflection structure includes a plurality of reflective grooves 2 whose two groove wall surfaces form different angles. The different here can be that the angles formed by the two groove wall surfaces of the plurality of reflective grooves 2 are different, or the angles formed by the two groove wall surfaces of some reflective grooves 2 are the same, while the angles formed by the two groove wall surfaces of other parts of the reflective grooves 2 are different.

[0039] Next, an optional implementation is given in conjunction with the accompanying drawings, where the cross-section of the angle formed by the two groove walls of each reflective groove 2 is V-shaped. Of course, the following structural improvement can also be made here, that is, the cross-section of the angle formed by the two groove walls of each reflective groove 2 is arc-shaped.

[0040] In summary, the total reflection structure of this embodiment has multiple reflection grooves formed on the base surface, and the two groove walls of each reflection groove can reflect the incident light twice through the two groove walls and then collimate it along the axis direction of the parabola. In this case, the light efficiency can be improved by total reflection of the light twice in each reflection groove.

[0041] In addition, the structure of the reflective groove is adopted, which can reflect the light incident on one of the groove walls of the reflective groove to the other groove wall of the reflective groove and emit it. Through this structure, part of the light can be reflected through the upper half of the reflective groove, so that the light can be diffused along the parabola in the up and down direction, thereby solving the problem of light loss caused by total reflection of the upper half of the reflective surface of the thick-walled part in the prior art after receiving the light due to the incident angle greater than the critical value, and preventing the light energy from being concentrated in the lower half of the reflective surface. In addition, the total reflection structure of this embodiment can also make the light interchangeable between a pair of groove walls of the reflective groove, diffuse the light concentrated in the center of the parabola in the left and right directions along the parabola, expand the reflection range of the light, and help to improve the uniformity of the lighting effect.

[0042] Embodiment 2:

[0043] See also Figures 2 to 8 As shown, based on the total reflection structure of Example 1, this embodiment provides an optical module, including: the total reflection structure of Example 1, a light incident surface 1 and a light source 3 suitable for coupling with the total reflection structure, and a light emitting surface 4. The light emitting surface 4 can be provided with a corn kernel pattern as required to improve the uniformity of lighting. The light emitted by the light source 3 enters the light incident surface 1, is collimated by the light incident surface 1 and then emitted toward the total reflection structure, and finally emitted from the light emitting surface 4; when the light from the light source 3 entering the light incident surface 1 hits the total reflection structure with the reflection groove 2, the light can be collimated after being reflected by the reflection groove 2, and emitted perpendicular to the incident direction of the light.

[0044] More specifically, in an optional implementation, the light incident surface 1 is formed by rotating the cross-sectional profile of the concentrator, and the rotation axis K is a line segment passing through the center of the light source 3 and parallel to the total reflection structure, so that the light emitted by the light source 3 is more efficiently directed to the total reflection structure and is totally reflected.

[0045] In another optional implementation, the light incident surface 1 is formed by rotating the cross-sectional profile of Fresnel, and the rotation axis K is a line segment passing through the center of the light source 3 and parallel to the total reflection structure. The pattern of the light incident surface 1 here is a plurality of concentric serrated grooves centered on the center of the light source 3, and the angles between each serrated groove and the adjacent serrated grooves are different. It should be noted that the cross section of the serrated groove here is the cross-sectional profile of Fresnel, and the purpose of designing the serrated groove is to allow light to enter the light incident surface 1, and to form a plurality of collimated light rays after being reflected by the serrated groove; and the different angles between each serrated groove and the adjacent serrated groove are designed to satisfy the reflection of light at different angles after entering.

[0046] In summary, the middle part of the concentrator is usually very bright, and the reflection groove 2 in the total reflection structure in this embodiment can collimate the light with strong energy perpendicular to the light source 3 and then disperse it, that is, through this structure, part of the light can be transferred to the outside through refraction, reducing the brightness of the reflection surface corresponding to the middle part, preventing the light from being too concentrated, which is conducive to improving uniformity. That is, the optical module of this embodiment can diffuse the strong light concentrated directly below the light source 3 up and down and left and right along the parabola, making the lighting effect more uniform.

[0047] Embodiment 3:

[0048] Based on the optical module of Example 2, this embodiment provides a vehicle lamp, comprising: at least one optical module of Example 2, that is, multiple optical modules of Example 2 can be used in combination to guide light emitted by multiple light sources 3, thereby meeting the use requirements of the vehicle lamp.

[0049] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0050] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. An optical module, characterized in that: include: A total reflection structure, a light incident surface suitable for coupling with the total reflection structure, and a light source; The total reflection structure comprises a base surface formed by stretching a parabola as the base line and a plurality of reflection grooves formed in parallel on the base surface and extending respectively along the parabola direction of the base surface; and the plurality of reflection grooves are connected to each other to form a tooth shape; Each reflective groove comprises two groove walls connected by bending, and the angle formed by the two groove walls is 90±5°; and The two groove walls of each reflection groove can collimate the incident light and emit it along the axis direction of the parabola after two total reflections through the two groove walls; The light incident surface is formed by rotating the cross-sectional profile of the Fresnel, and the rotation axis is a line segment passing through the center of the light source and parallel to the total reflection structure; the pattern of the light incident surface is a plurality of concentric serrated grooves centered on the center of the light source, and the angle between each serrated groove and the adjacent serrated groove is different.

2. The optical module according to claim 1, characterized in that: The angles formed by two groove wall surfaces of the multiple reflection grooves included in the total reflection structure are all the same.

3. The optical module according to claim 2, characterized in that: The angles formed by two groove walls of the multiple reflection grooves included in the total reflection structure are all 90°.

4. The optical module according to claim 1, characterized in that: The angles formed by two groove walls of the multiple reflection grooves included in the total reflection structure are different.

5. The optical module according to any one of claims 1 to 4, characterized in that: The cross section of the angle formed by the two groove walls of each reflecting groove is in a V shape.

6. The optical module according to any one of claims 1 to 4, characterized in that: The cross section of the angle formed by the two groove walls of each reflecting groove is in an arc shape.

7. A vehicle lamp, characterized in that: include: At least one optical module according to any one of claims 1 to 6.

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