Optical module and light-emitting module

Abstract

The utility model discloses an optical module and a light-emitting module, comprising a light-transmitting element which comprises a light-in surface and a light-out surface which are sequentially arranged along the light transmission direction, and the corresponding edge parts of the light-in surface and the light-out surface are connected through a shielding edge surface; at least part of the shielding edge face is provided with a light guiding-out structure, and the outline shape of the longitudinal section of the light guiding-out structure is a bent line. And the shielding part correspondingly covers the light guide-out structure and is used for shielding the light emitted from the surface of the light guide-out structure and / or absorbing the light emitted from the surface of the light guide-out structure.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive lamps, in particular to an optical module and a light-emitting module. Background Art

[0002] At present, the headlamp lens module is the mainstream in the market and has been widely applied to various main engine models. However, due to the thickness of the lens, the light emitted from the first-level optical element of the module, after entering the lens 1, will undergo total internal reflection on the upper / lower surface of the lens 1. The light rays after total internal reflection have a large deflection angle, as Figure 1 shown. When the light rays are incident on the light-emitting surface of the lens 1, the incident angle β is large. Therefore, after refraction by the light-emitting surface of the lens, the exit angle is also large, resulting in separation from the normal light pattern and forming stray light.

[0003] The flattening of the lens is the current development trend of the headlamp shape. The flatter the lens, with the increase in thickness, will cause more serious total internal reflection. Since total internal reflection on both the upper surface and the lower surface of the lens will generate stray light, the stray light formed by total internal reflection on the lower surface of the lens often concentrates above, affecting the three zones of the low beam, resulting in NG in the low beam three-zone regulation test, and further causing the entire lamp light distribution test to fail and scrapping; while the stray light formed by total internal reflection on the upper surface of the lens will concentrate below, forming a local bright spot in front of the vehicle, as Figure 2 shown. Summary of the Utility Model

[0004] This solution aims at at least some of the problems and requirements mentioned above, and proposes an optical module and a light-emitting module, which can achieve the above technical purposes and bring many other technical effects due to the following technical features.

[0005] The utility model proposes an optical module, including:

[0006] A light-transmitting element, including an incident light surface and an exit light surface arranged in sequence along the light transmission direction, and the edge parts of the incident light surface and the exit light surface corresponding to each other are connected by a shielding edge surface; at least part of the shielding edge surface has a light guiding structure, and the contour shape of the light guiding structure in the longitudinal section is a broken line;

[0007] A shielding member, correspondingly covering the light guiding structure, for shielding the light rays emitted from the surface of the light guiding structure, and / or for absorbing the light rays emitted from the surface of the light guiding structure.

[0008] In some embodiments, the light guiding structure is strip-shaped, and both ends of the light guiding structure respectively extend to the edges of two shielding edge surfaces adjacent to the shielding edge surface where the light guiding structure is located.

[0009] In some embodiments, the included angle between the length extension direction of the light guiding structure and the direction in which the light incident surface and the light exit surface are arranged in sequence is 90°.

[0010] In some embodiments, the longitudinal vertical cross-sectional shape of the light guiding structure is triangular.

[0011] In some embodiments, there are two or more of the triangles, which are arranged at intervals or continuously on the shielding edge surface.

[0012] In some embodiments, the height by which the vertex of the triangle protrudes from the shielding edge surface where it is located is 0.5 - 2 mm; alternatively, the apex angle of the triangle is 120° - 140°.

[0013] In some embodiments, the distance between the shielding member and the apex angle of the triangle is 1 - 1.5 mm.

[0014] In some embodiments, the upper edge parts corresponding in position of the light incident surface and the light exit surface are connected by an upper shielding edge surface, and the lower edge parts corresponding in position of the light incident surface and the light exit surface are connected by a lower shielding edge surface. Both the upper shielding edge surface and the lower shielding edge surface have light guiding structures and are respectively provided with shielding members.

[0015] A light emitting module includes a light source and any one of the optical modules described above. The light source is disposed on one side of the light incident surface of the light transmissive element close to it, and is used to project light onto the light incident surface.

[0016] In some embodiments, the light emitting module is a low beam module, or a high beam module, or a high and low beam integrated module.

[0017] In the following, the optimal embodiments of implementing the present invention will be described in more detail with reference to the accompanying drawings, so as to facilitate understanding of the features and advantages of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Among them, the drawings are only used to show some embodiments of the present invention, rather than limiting all embodiments of the present invention thereto.

[0019] Figure 1 is the optical path principle of stray light generated by the existing vehicle headlight solution;

[0020] Figure 2 is the schematic diagram of the scene where stray light is generated by the existing vehicle headlight solution;

[0021] Figure 3 is Figure 2 the actual display light effect diagram of the vehicle headlight solution;

[0022] Figure 4 Optical path schematic diagram of the optical module provided by an embodiment of the present application;

[0023] Figure 5 is Figure 4 Display light effect diagram of the optical module;

[0024] Figure 6 Schematic diagram of the vertex of the light ray export structure of the optical module protruding 0.5 - 2 mm from the height of the corresponding occlusion edge surface, and the apex angle being 120° - 140°;

[0025] Figure 7 is Figure 6 Display light effect diagram of the optical module;

[0026] Figure 8 Structural schematic diagram of the optical module of the present application;

[0027] Figure 9 is Figure 8 Schematic diagram after omitting the occlusion component in ;

[0028] In the figure,

[0029] 1. Lens;

[0030] 100. Translucent element; 110. Light incident surface; 120. Light exit surface; 130. Occlusion edge surface; 131. Upper occlusion edge surface; 132. Lower occlusion edge surface; 133. Left occlusion edge surface; 134. Right occlusion edge surface; 140. Light ray export structure;

[0031] 200. Occlusion component. Specific embodiments

[0032] In order to make the objectives, technical solutions, and advantages of the technical solutions of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present utility model. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0033] Unless otherwise defined, technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the field to which this utility model pertains. The terms "first", "second" and similar terms used in the description and claims of this utility model patent application do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "an" do not necessarily denote a quantity limitation. Terms such as "comprising" or "including" mean that the elements or items appearing before this term cover the elements or items listed after this term and their equivalents, without excluding other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] As Figures 1-2 is a schematic diagram of the existing solution generating stray light in front of the vehicle. The stray light formed by total internal reflection on the upper surface of the headlight lens 1 will be concentrated below, forming a stray light area in front of the vehicle, and Figure 3 in the area outside the effective illumination area in front of the vehicle ( Figure 3 in the box) there are obvious bright spots. The bright spots have various adverse effects. They will not only affect the driver's visual experience, but also pose a potential threat to night driving safety. For the driver, when driving in an environment with stray light in front of the vehicle for a long time, the driver's eyes need to continuously adjust to adapt to different intensities of light stimuli, which will cause dry and fatigued eyes. The driver's reaction speed will slow down and the judgment ability will decline, posing a serious threat to driving safety. Secondly, when there is water accumulation on the road surface or in rainy days, the stray light in front of the vehicle may be directly reflected by the water surface and shine into the eyes of oncoming vehicle drivers, causing glare and then leading to uncontrollable situations.

[0035] The traditional solution uses the method of lens surface coating to break total internal reflection. This method can weaken stray light to a certain extent, but cannot completely eliminate it. How to eliminate the stray light formed by total internal reflection on the upper and lower surfaces of the lens remains a difficult problem in the current industry.

[0036] Based on this, referring to Figure 4 , Figures 8-9 , this application provides an optical module, including:

[0037] The light-transmitting element 100 includes a light-incident surface 110 and a light-emitting surface 120 arranged in sequence along the light-transmission direction. The edge parts of the light-incident surface 110 and the light-emitting surface 120 corresponding to each other are connected by a shielding edge surface 130; at least part of the shielding edge surface 130 has a light-emitting structure 140, and the contour shape of the light-emitting structure 140 in the longitudinal section extending along the light-transmission direction is a broken line;

[0038] The shielding member 200 correspondingly covers the light-emitting structure 140 and is used to shield the light emitted from the surface of the light-emitting structure 140 and / or absorb the light emitted from the surface of the light-emitting structure 140.

[0039] Such as Figure 4 , a light-emitting structure 140 is added to the surface of the light-transmitting element 100, and the light entering the light-transmitting element 100 will be transmitted into the light-emitting structure 140. Compared with the traditional solution where the light hits the horizontal upper edge surface, the incident angle α of the light hitting the surface of the light-emitting structure 140 is significantly smaller than the incident angle β between the light and the horizontal upper edge surface. The value of the incident angle α is small and does not meet the condition of total reflection. Therefore, most of the light hitting the surface of the light-emitting structure 140 will directly pass through the light-emitting structure 140 and leak outwards, and the light will not be totally reflected back into the light-transmitting element 100.

[0040] The above-mentioned leaked light is blocked by the shielding member 200 made of an opaque material, and the shielding member 200 can absorb the leaked light; or, the shielding member 200 reflects the light towards the light-transmitting element 100, and the amount of light that can return to the light-transmitting element 100 again through the surface of the bent light-emitting structure 140 in the reflected light is very small, and can only dissipate energy after multiple reflections between the light-transmitting element 100 and the shielding member 200. At this time, the bent light-emitting structure 140 has the function of diffuse reflection.

[0041] In this application, by setting the light-emitting structure 140, most of the light hitting the surface of the light-emitting structure 140 will directly pass through the light-emitting structure 140 and leak outwards, thereby initially reducing stray light; and, the leaked light is absorbed by the shielding member 200 or blocked and dissipated by multiple reflections between the shielding member 200 and the surface of the light-emitting structure 140, and will not spread outwards to form a larger range of scattering; after being blocked and absorbed by the shielding member 200, there is basically no or only a very small amount of leaked light reflected back to the light-transmitting element 100, and the amount of stray light is significantly reduced.

[0042] Since the amount of stray light emitted by the light-transmitting element 100 is reduced, there is rarely stray light formed by total reflection hitting the upper part in the distance in front of the vehicle on the lower surface of the light-transmitting element 100 in the figure, which avoids affecting the three zones of the low beam. The low beam three-zone regulation test is qualified, and the yield rate is improved.

[0043] Figure 4 Very little stray light formed by total reflection hits the lower part in front of the vehicle on the upper surface of the light-transmitting element 100, avoiding the formation of obvious bright spots in front of the vehicle (such as Figure 5 ), eliminating the adverse effects of the stray light in front of the vehicle, providing a better visual experience for the driver, and ensuring the safety of night driving.

[0044] Reference Figure 9 , in some embodiments, the light guiding structure 140 is strip-shaped, and both ends of the light guiding structure 140 extend to the edges of two shielding edge surfaces 130 adjacent to the shielding edge surface 130 where the light guiding structure 140 is located.

[0045] Specifically, the edge parts in all directions of the upper and lower, left and right of the light incident surface 110 and the light exit surface 120 are connected by an upper shielding edge surface 131, a lower shielding edge surface 132, a left shielding edge surface 133, and a right shielding edge surface 134 respectively. In the figure, the light guiding structure 140 is strip-shaped and located on the upper shielding edge surface 131, and both ends of the light guiding structure 140 extend to the edges of the left shielding edge surface 133 and the right shielding edge surface 134 adjacent to the shielding edge surface 130 where the light guiding structure 140 is located. With such a setting, the light guiding structure 140 can cover the upper shielding edge surface 131 of the light-transmitting element 100 in the length extension direction and connect the left shielding edge surface 133 and the right shielding edge surface 134, which is beneficial to making the light hitting the upper shielding edge surface 131 in the figure all come into contact with the surface of the light guiding structure 140, and then leaking out from the light guiding structure 140.

[0046] This embodiment takes the light guiding structure 140 being arranged on the upper shielding edge surface 131 as an example. In other embodiments, the light guiding structure 140 can also be arranged on the shielding edge surfaces 130 of other sides, which is not limited here.

[0047] It should be noted that the orientations mentioned in this application are determined based on the orientations when installed on the vehicle, which are specifically shown in the figure.

[0048] Reference Figure 9 , in some embodiments, the included angle between the length extension direction of the light guiding structure 140 and the direction in which the light incident surface 110 and the light exit surface 120 are arranged in sequence is 90°. Such as Figure 9As shown, the light guiding structure 140 is strip-shaped and is provided on the upper shielding edge surface 131. Its length extension direction is consistent with the direction perpendicular to the paper surface in the figure (connecting the left shielding edge surface 133 and the right shielding edge surface 134). In this case, the light guiding structure 140 is perpendicular to the longitudinal vertical section of the light transmissive element 100, and most of the light in the light transmissive element 100 is parallel to the longitudinal vertical section. Therefore, the incident angle of the light hitting the surface of the light guiding structure 140 is small, which is beneficial to the light exiting from the surface of the light guiding structure 140 and avoiding total reflection back into the light transmissive element 100.

[0049] Reference Figure 9 , in some embodiments, the bending line is arranged discontinuously or continuously. The arrangement form of the bending line can be discontinuous or continuous, and can be freely set according to the light extinction requirement or the shaping requirement of the actual product.

[0050] Reference Figure 4 , in some embodiments, the longitudinal vertical section (the vertical section extending in the front-back direction) of the light guiding structure 140 is triangular in shape. Specifically, in the figure, when the light hits the side wall of the triangular design closer to the front, the incident angle α is significantly smaller than the incident angle β between the light and the horizontal upper edge surface. The value of the incident angle α is small and does not meet the condition of total reflection. Therefore, most of the light hitting the surface of the light guiding structure 140 will directly pass through the light guiding structure 140 and leak outwards, and the light will not be totally reflected back into the interior of the light transmissive element 100.

[0051] In this embodiment, a structure design with a triangular cross-section is adopted, which can form a flat side wall, is beneficial to forming a small incident angle α between the light and the side wall, and at the same time, the triangular structure is regular and convenient for molding and processing.

[0052] Reference Figure 4 and Figure 9 , in some embodiments, there are two or more of the triangles, which are arranged at intervals or continuously on the shielding edge surface 130. The design of multiple triangles indicates that there are multiple light guiding structures 140 arranged side by side, which can increase the probability of the light hitting its surface and leaking outwards.

[0053] Reference Figure 6 , in some embodiments, the height by which the vertex of the triangle protrudes from the shielding edge surface 130 where it is located is 0.5 - 2 mm. The design angle and height of the triangle are both crucial for the light path and directly affect the stray light extinction effect. If the vertex of the triangle is too high, it will occupy more space and affect the static appearance. If the vertex of the triangle is too low, partial light will still undergo total reflection. Actual tests show that when the height by which the vertex of the triangle protrudes from the shielding edge surface 130 where it is located is 0.5 - 2 mm, the extinction effect is the best and the static appearance is beautiful.

[0054] ReferenceFigure 6 , in some embodiments, the apex angle of the triangle is in the range of 120° to 140°. The apex angle of the triangle directly affects the optical path and the extinction effect of stray light. If the apex angle of the triangle is too small, the light will leak out of one triangular structure and then enter the forward triangular structure again, and the light cannot be controlled; if the apex angle of the triangle is too large, partial total reflection of light will occur. Actual tests show that when the apex angle of the triangle is in the range of 120° to 140°, the light will basically leak out from the surface of the light extraction structure 140, and the extinction effect is better.

[0055] Such as Figure 7 is the display light effect diagram of the optical module in which the vertex of the triangular light extraction structure 140 protrudes 0.5 to 2 mm from the height of the corresponding shielding edge surface 130 and the apex angle is 120° to 140°. By comparing with Figure 5 it can be seen that Figure 5 in the area of vehicle front stray light ( Figure 5 in the square box), a faint bright light can be seen, while Figure 7 in the vehicle front area ( Figure 7 in the square box), there is no any bright light. It can be seen that at this time, there is no stray light formed by total reflection hitting the lower part in front of the vehicle on the upper surface of the light transmissive element 100. The adverse effect of vehicle front stray light is completely eliminated in this embodiment, the visual experience of the driver is better, and the potential safety hazard of night driving is completely eliminated.

[0056] Refer to Figure 4 , in some embodiments, the distance between the side surface of the shielding member 200 close to the light transmissive element 100 and the apex angle of the triangle is 1 to 1.5 mm. If the distance between the shielding member 200 and the apex angle of the triangle is set too large, the light leaking out from the surface of the light extraction structure 140 may diverge into the external space. Therefore, in this embodiment, the distance between the shielding member 200 and the apex angle of the triangle is 1 to 1.5 mm. After verification, after adopting this setting method with a small distance, the leaked light is absorbed by the shielding member 200 or blocked and dissipated by repeated reflection between the shielding member 200 and the surface of the light extraction structure 140, and will not spread outwards to form a larger range of scattering, and the amount of stray light is significantly reduced.

[0057] Refer to Figure 8 and Figure 9 , in some embodiments, the upper edge parts corresponding to the incident surface 110 and the exit surface 120 are connected by an upper shielding edge surface 131, and the lower edge parts corresponding to the incident surface 110 and the exit surface 120 are connected by a lower shielding edge surface 132. Both the upper shielding edge surface 131 and the lower shielding edge surface 132 have a light extraction structure 140, and are respectively covered with a shielding member 200.

[0058] Specifically, the upper shielding edge surface 131 and the lower shielding edge surface 132 of the product can be respectively designed with shielding components 200, which can shield or absorb light from the upper and lower sides respectively. When applied in a low-beam module, very little stray light formed by total reflection will hit the upper part in the distance in front of the vehicle on the lower surface of the light-transmitting element 100, avoiding affecting the three zones of the low beam, passing the low-beam three-zone regulation test, and improving the yield rate. Moreover, very little stray light formed by total reflection will hit the lower part in front of the vehicle on the upper surface of the light-transmitting element 100, avoiding the formation of bright spots in front of the vehicle, eliminating the adverse effects of the stray light in front of the vehicle, providing a better visual experience for the driver, and ensuring the safety of night driving.

[0059] The present application also provides a lighting module, including a light source and the optical module as claimed in the claims. The light source is arranged on one side of the light incident surface 110 of the light-transmitting element 100, and is used for projecting light onto the light incident surface 110.

[0060] Furthermore, the lighting module is a low-beam module, or a high-beam module, or a high-low beam integrated module, and can be applied to a variety of common means of transportation.

[0061] In the foregoing, the exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments. However, those skilled in the art can understand that, without departing from the concept of the present invention, various modifications and changes can be made to the above specific embodiments, and various combinations of the technical features and structures proposed by the present invention can be made without exceeding the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. An optical module, characterized in that: include: The light-transmitting element comprises a light incident surface and a light emitting surface sequentially arranged along the light transmission direction, wherein the edge portions of the light incident surface and the light emitting surface corresponding to each other are connected via a shielding edge surface; At least part of the shielding edge surface has a light emitting structure, and the contour shape of the light emitting structure in the longitudinal section is a bending line; The shielding component covers the light emitting structure and is used to shield the light emitted from the surface of the light emitting structure and / or to absorb the light emitted from the surface of the light emitting structure.

2. The optical module according to claim 1, characterized in that: The light emitting structure is in the shape of an elongated strip, and two ends of the light emitting structure extend respectively to the edges of two shielding edge surfaces adjacent to the shielding edge surface where the light emitting structure is located.

3. The optical module according to claim 2, characterized in that: The angle between the length extension direction of the light output structure and the direction in which the light incident surface and the light emitting surface are sequentially arranged is 90°.

4. The optical module according to claim 1, characterized in that: The longitudinal vertical cross-section of the light output structure is in the shape of a triangle.

5. The optical module according to claim 4, characterized in that: There are two or more triangular structures, which are arranged at intervals or continuously on the shielding edge surface.

6. The optical module according to claim 4, characterized in that: The height of the apex of the triangle protruding from the shielding edge surface is 0.5 to 2 mm; or, the apex angle of the triangle is 120° to 140°.

7. The optical module according to claim 4, characterized in that: The distance between a side surface of the shielding component close to the light-transmitting element and the vertex of the triangle is 1 to 1.5 mm.

8. The optical module according to claim 1, characterized in that: The upper edge portions corresponding to the positions of the light incident surface and the light emitting surface are connected via an upper blocking edge surface, and the lower edge portions corresponding to the positions of the light incident surface and the light emitting surface are connected via a lower blocking edge surface, and at least one of the upper blocking edge surface and the lower blocking edge surface has a light emitting structure on its surface, and the surface of the light emitting structure covers the blocking component.

9. A light emitting module, characterized in that: It comprises a light source and the optical module according to any one of claims 1 to 8, wherein the light source is arranged close to a light incident surface of the light-transmitting element and is used for projecting light onto the light incident surface.

10. The light emitting module according to claim 9, characterized in that: The light emitting module is a low beam module, a high beam module, or a high and low beam integrated module.

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