Optical system for vehicle lamp and vehicle lamp

Abstract

The present invention provides an optical system for a vehicle lamp and a vehicle lamp, the optical system comprising: a light source, a thick-walled light guide, a light-transmitting portion and a reflective bowl; the light-incident surface of the thick-walled light guide faces the light source; the light-transmitting portion is located on one side of the thick-walled light guide or surrounds the thick-walled light guide, the light-incident surface of the light-transmitting portion is on the same side as the light-incident surface of the thick-walled light guide, and the light-emitting surface of the light-transmitting portion is on the same side as the light-emitting surface of the thick-walled light guide; the reflective bowl is located on one side of the light source or surrounds the light source, and the reflective bowl is used to reflect the light emitted by the light source toward the light-incident surface of the light-transmitting portion; a part of the light emitted by the light source is directly emitted outward through the thick-walled light guide to meet the legal lighting requirements; another part of the light emitted by the light source is directly or reflected by the reflective bowl and then emitted outward through the light-transmitting portion, and the light-transmitting portion is used to increase the lighting area of ​​the vehicle lamp. After adopting the above technical solution, the vehicle lamp with the optical system can simultaneously meet the legal lighting requirements and the minimum lighting area requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamps, and in particular to an optical system for a vehicle lamp and a vehicle lamp. Background Art

[0002] Reflector bowls and thick-walled light guides are commonly used optical concepts in car lights. The reflector bowl optical concept includes the direct reflector bowl optical concept and the indirect reflective reflector bowl optical concept. Due to the high optical efficiency of the reflector bowl optical concept and the simple manufacturing and assembly process, it is widely used in the optical design of car lights. Compared with the reflector bowl optical concept, the thick-walled light guide optical concept is also widely used in car light design because of its special crystal clear appearance effect when not lit and the uniform light-emitting surface after lighting. However, the application scope of the thick-walled light guide optical concept is limited by factors such as its geometric size, optical efficiency, and manufacturing cost.

[0003] For some headlights, such as the turn signals in the rear taillights of cars, in North America, they must not only meet the optical light distribution requirements stipulated by the regulations, but also meet the minimum lighting area requirements required by the American Society of Automotive Engineers. If the reflective bowl optical concept is used alone in the headlight, although the optical efficiency is high, the brightness of the luminous surface before and after lighting is inconsistent, and the uniformity is poor. If the thick-walled optical concept is used alone in the headlight, although there is a better optical effect before and after lighting, it is difficult to meet the optical light distribution requirements of the regulations and the minimum lighting area requirements required by the American Society of Automotive Engineers at the same time due to geometric size, optical efficiency and cost constraints.

[0004] Therefore, it is necessary to develop an optical system and a lamp that simultaneously meet the legal lighting requirements and the minimum lighting area requirements, have high optical efficiency, and have good optical effects before and after lighting. Summary of the invention

[0005] In order to overcome the above technical defects, the purpose of the present invention is to provide an optical system and a lamp that simultaneously meet the legal lighting requirements and the minimum lighting area requirements, have high optical efficiency, and have good optical effects before and after lighting.

[0006] The present invention discloses an optical system for a vehicle lamp, comprising: a light source, a thick-walled light guide, a light-transmitting portion and a reflective bowl;

[0007] The light incident surface of the thick-walled light guide faces the light source;

[0008] The light-transmitting portion is located at one side of the thick-walled light guide or surrounds the thick-walled light guide, the light incident surface of the light-transmitting portion is on the same side as the light incident surface of the thick-walled light guide, and the light emitting surface of the light-transmitting portion is on the same side as the light emitting surface of the thick-walled light guide;

[0009] The reflective bowl is located on one side of the light source or surrounds the light source, and is used to reflect the light emitted by the light source toward the light incident surface of the light-transmitting portion;

[0010] A portion of the light emitted by the light source is directly emitted toward the light incident surface of the thick-walled light guide, and is emitted outward through the light exit surface of the thick-walled light guide; a portion of the light emitted by the light source is emitted toward the reflective bowl, and after being reflected by the reflective bowl, is emitted toward the light incident surface of the light-transmitting portion, and is emitted outward through the light exit surface of the light-transmitting portion; a portion of the light emitted by the light source is directly emitted toward the light incident surface of the light-transmitting portion, and is emitted outward through the light exit surface of the light-transmitting portion.

[0011] Preferably, the optical system further comprises a reflecting portion, which is arranged on one side of the thick-walled light guide or surrounds the thick-walled light guide, and is located between the light source and the light-transmitting portion, and is used for reflecting the light emitted by the light source directly toward the light-transmitting portion toward the reflective bowl, and the light reflected toward the reflective bowl is reflected by the reflective bowl and then emitted toward the light incident surface of the light-transmitting portion.

[0012] Preferably, the reflecting portion and the reflective bowl are integrally formed.

[0013] Preferably, the light incident surface of the thick-walled light guide is an optical focusing surface, the light source is located at the focus of the optical focusing surface, and the optical focusing surface is configured to make the light entering the thick-walled light guide from the optical focusing surface propagate in parallel in the thick-walled light guide;

[0014] The light emitting surface of the thick-walled light guide is provided with an optical pattern for light uniformity.

[0015] Preferably, the light incident surface of the light-transmitting portion is a plane;

[0016] The material of the light-transmitting part is glass or optical plastic.

[0017] Preferably, the reflecting surface of the reflective bowl is a parabola, and the light source is located at the focus of the parabola.

[0018] The invention also discloses a vehicle lamp, comprising the above optical system.

[0019] Preferably, the vehicle lamp further comprises a housing, a light shielding portion and a lens portion;

[0020] The light shielding portion is arranged on a side of the light transmitting portion away from the thick-walled light guide;

[0021] The housing is fixedly connected to the lens portion to form a closed space;

[0022] The optical system and the light shielding portion are both arranged in the closed space, and the light emitting surfaces of the thick-walled light guide and the light-transmitting portion face the lens portion.

[0023] Preferably, the light source is an LED lamp bead, which is arranged on a PCB board;

[0024] The PCB board is fixedly connected to the housing;

[0025] The reflective bowl is fixedly connected to the shell;

[0026] The thick-walled light guide is fixedly connected to the reflective bowl and the PCB board;

[0027] The light-transmitting portion is fixedly connected to the light-shielding portion, and the light-shielding portion is fixedly connected to the housing.

[0028] Preferably, the vehicle light is a turn signal light in a rear taillight.

[0029] After adopting the above technical scheme, compared with the existing technology, the beneficial effect is that the optical concept of thick-walled light guide and the optical concept of reflective bowl are combined together. The optical area of ​​the thick-walled light guide meets the requirements of lighting distribution regulations. At the same time, the reflective bowl is used to reflect the light that has not propagated into the thick-walled light guide, so that it can be emitted through the light-transmitting part, so that the area of ​​the optical area of ​​the light-transmitting part can meet the lighting area requirements stipulated by the American Society of Automotive Engineers, thereby improving the optical efficiency and having better optical effects before and after lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of an optical system in a vehicle lamp according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Light path diagram of the optical system;

[0032] Figure 3 for Figure 2 Light path diagram at medium-thick wall light guide;

[0033] Figure 4 for Figure 1 Front view of the optical system.

[0034] Figure 5 To have Figure 1 An exploded view of the optical system of a headlight;

[0035] Reference numerals:

[0036] 100-PCB board, 110-light source, 200-thick-walled light guide, 210-light incident surface of the thick-walled light guide, 220-light emitting surface of the thick-walled light guide, 300-reflective bowl, 400-light-transmitting portion, 410-light incident surface of the light-transmitting portion, 420-light emitting surface of the light-transmitting portion, 500-reflecting portion, 600-housing, 700-light-shielding portion, 800-lens portion. DETAILED DESCRIPTION

[0037] The advantages of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0040] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0041] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying 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.

[0042] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0043] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0044] See attached Figure 1-5 , is a schematic diagram of the structure of an optical system and a headlight having the optical system in one embodiment of the present invention. The optical system of this embodiment includes:

[0045] -Light source 110

[0046] The light source 110 is an LED light source, namely, an LED lamp bead, which is disposed on a PCB board 100 , and the PCB is used to provide a drive for the LED light source.

[0047] -Thick-walled light guide 200

[0048] The light incident surface 210 of the thick-walled light guide 200 faces the light source 110. Figure 3 Preferably, the light incident surface 210 of the thick-walled light guide 200 is an optical focusing surface, the light source 110 is located at the focus of the optical focusing surface, and the optical focusing surface is configured to make the light entering the thick-walled light guide 200 from the optical focusing surface propagate in parallel in the thick-walled light guide 200. In some embodiments, the optical focusing surface may be a Fresnel surface. The light exiting surface 220 of the thick-walled light guide 200 is provided with an optical pattern for uniform light, and the optical pattern may be a pillow-shaped, block-shaped or corn-shaped optical pattern, which is used to make the light uniformly emit outward through the light exiting surface 220. The material of the thick-walled light guide 200 may be PC or PMMA.

[0049] -Light-transmitting part 400

[0050] The light-transmitting portion 400 is located on one side of the thick-walled light guide 200 or surrounds the thick-walled light guide 200. The light-entering surface 410 of the light-transmitting portion 400 is on the same side as the light-entering surface 210 of the thick-walled light guide 200, and the light-emitting surface 420 of the light-transmitting portion 400 is on the same side as the light-emitting surface 220 of the thick-walled light guide 200. The surrounding mentioned here can be completely surrounding or partially surrounding, and can be flexibly set according to the design requirements of the vehicle lamp. See the attached Figure 4 , Attachment Figure 5In this embodiment, the light-transmitting portion 400 surrounds the thick-walled light guide 200 on three sides. The light-entering surface 410 of the light-transmitting portion 400 is preferably set as a vertical plane to allow more light to enter. The light-emitting surface 420 of the light-transmitting portion 400 can be flexibly set according to the shape requirements of the headlight. The material of the light-transmitting portion 400 can be glass or optical plastic, the material of the light-transmitting portion 400 is preferably PC, the color of the light-transmitting portion 400 is preferably gray, and the light-transmitting portion 400 presents a gray appearance before lighting, and presents a uniform and transparent lighting effect after lighting.

[0051] -Reflector 300

[0052] The reflective bowl 300 is located on one side of the light source 110 or surrounds the light source 110. The reflective bowl 300 is used to reflect the light emitted by the light source 110 toward the light incident surface 410 of the light-transmitting portion 400. The surrounding mentioned here can be completely surrounded or partially surrounded. Specifically, it can be flexibly set according to the design requirements of the vehicle lamp. Figure 5 In this embodiment, the reflective bowl 300 surrounds the light source 110 on three sides. The reflective surface of the reflective bowl 300 is a parabola, and the light source 110 is located at the focus of the parabola.

[0053] -Reflection part 500

[0054] The reflecting portion 500 is disposed on one side of the thick-walled light guide 200 or surrounds the thick-walled light guide 200. The reflecting portion 500 is located between the light source 110 and the light-transmitting portion 400. The reflecting portion 500 is used to reflect the light emitted by the light source 110 and directly emitted toward the light-transmitting portion 400 toward the reflective bowl 300. The light reflected toward the reflective bowl 300 is reflected by the reflective bowl 300 and then emitted toward the light incident surface 410 of the light-transmitting portion 400. The surrounding mentioned here can be complete surrounding or partial surrounding. Specifically, it can be flexibly set according to the design requirements of the vehicle lamp. See the attached Figure 5 In this embodiment, the reflective portion 500 surrounds the thick-walled light guide 200 on three sides. The reflective portion 500 and the reflective bowl 300 can be made of the same material. For example, the reflective portion 500 and the reflective bowl 300 can be formed by coating an aluminum film on a plastic surface. In some embodiments, the reflective portion 500 and the reflective bowl 300 are integrally formed.

[0055] See attached Figure 2 , Attachment Figure 3, is a light path diagram of the optical system of this embodiment, a part of the light emitted by the light source 110 is directly emitted toward the light incident surface 210 of the thick-walled light guide 200, and is emitted outward through the light emitting surface 220 of the thick-walled light guide 200; a part of the light emitted by the light source 110 is emitted toward the reflecting portion 500, and the reflecting portion 500 reflects the part of the light toward the reflective bowl 300, and the part of the light is reflected by the reflective bowl 300 and emitted toward the light incident surface 410 of the light-transmitting portion 400, and is emitted outward through the light emitting surface 420 of the light-transmitting portion 400; another part of the light emitted by the light source 110 is emitted toward the reflective bowl 300, and is reflected by the reflective bowl 300 and emitted toward the light incident surface 410 of the light-transmitting portion 400, and is emitted outward through the light emitting surface 420 of the light-transmitting portion 400. In this embodiment, the light emitted through the thick-walled light guide 200 is used to meet the optical light distribution requirements stipulated by the law, and the light emitted through the light-transmitting portion 400 is used to meet the minimum lighting area requirements. By providing the reflective portion 500, the light with higher intensity emitted by the light source 110 is reflected to the reflective bowl 300 and then emitted outward through the middle of the light-transmitting portion 400 after being reflected by the reflective bowl 300, which helps to improve the uniformity of the light emitted by the light-transmitting portion 400 and can prevent the light with higher intensity from being directly emitted to the outer edge of the light-transmitting portion 400 ( Figure 1 The reflective portion 500 is disposed on the optical system, and the ...

[0056] The optical system of this embodiment combines a reflective bowl and a thick-walled light guide together, so that the thick-walled light guide area meets the requirements of lighting distribution regulations. The light that does not enter the thick-walled light guide is reused through the reflective bowl to illuminate the light-transmitting portion next to the thick-walled light guide, so that the area of ​​the light-transmitting portion can meet the minimum lighting area requirement, thereby improving the optical efficiency of the optical system and achieving uniform optical effects before and after lighting.

[0057] See attached Figure 5, is an exploded view of a headlight with the above optical system in an embodiment of the present invention. In addition to the optical system, the headlight also includes a housing 600, a light shielding portion 700 and a lens portion 800; the light shielding portion 700 is arranged on the side of the light-transmitting portion 400 away from the thick-walled light guide 200, and the light shielding portion 700 is made of an opaque material to block the light emitted by the light-transmitting portion 400 in this direction. The housing 600 is fixedly connected to the lens portion 800, preferably, fixedly connected by welding to form a closed space. The material of the lens portion 800 is preferably PMMA. The optical system and the light shielding portion 700 are both arranged in the closed space, and the light-emitting surfaces of the thick-walled light guide 200 and the light-transmitting portion 400 face the lens portion 800, and the light emitted through the light-emitting surfaces of the thick-walled light guide 200 and the light-transmitting portion 400 is emitted outward through the lens portion 800.

[0058] Specifically, the PCB board 100 provided with the light source 110 is fixedly connected to the housing 600 by screws and screw columns, the reflective bowl 300 is fixedly connected to the housing 600 by screws and screw columns, the thick-walled light guide 200 is fixedly connected to the reflective bowl 300 and the PCB board 100 by screws and screw columns, the light-transmitting portion 400 is fixedly connected to the light-shielding portion 700 by screws or screw columns, and the light-shielding portion 700 is fixedly connected to the housing 600 by screws or screw columns. The above-mentioned fixed connection by screws or screw columns is only a preferred fixed connection method, and those skilled in the art can replace it with a snap connection or other suitable fixed connection method as needed, and can also combine multiple connection methods to jointly achieve the fixed connection between the above-mentioned components.

[0059] In this embodiment, the vehicle lamp is a turn signal lamp in a rear tail lamp. The optical system of this embodiment can also be effectively applied to other vehicle lamps that have both legal lighting requirements and minimum lighting area requirements.

[0060] It should be noted that the embodiments of the present invention have better practicability and do not impose any form of limitation on the present invention. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modification or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An optical system for a vehicle lamp, It is characterized in that include: Light source, thick-walled light guide, light-transmitting part and reflective bowl; The light incident surface of the thick-walled light guide faces the light source; The light-transmitting portion is located at one side of the thick-walled light guide or surrounds the thick-walled light guide, the light incident surface of the light-transmitting portion is on the same side as the light incident surface of the thick-walled light guide, and the light emitting surface of the light-transmitting portion is on the same side as the light emitting surface of the thick-walled light guide; The reflective bowl is located on one side of the light source or surrounds the light source, and is used to reflect the light emitted by the light source toward the light incident surface of the light-transmitting portion; A portion of the light emitted by the light source is directly emitted toward the light incident surface of the thick-walled light guide, and is emitted outward through the light exit surface of the thick-walled light guide; a portion of the light emitted by the light source is emitted toward the reflective bowl, and is reflected by the reflective bowl and emitted toward the light incident surface of the light-transmitting portion, and is emitted outward through the light exit surface of the light-transmitting portion; a portion of the light emitted by the light source is directly emitted toward the light incident surface of the light-transmitting portion, and is emitted outward through the light exit surface of the light-transmitting portion; The optical system also includes a reflecting portion, which is arranged on one side of the thick-walled light guide or surrounds the thick-walled light guide, and is located between the light source and the light-transmitting portion. The reflecting portion is used to reflect the light emitted by the light source and directly emitted toward the light-transmitting portion toward the reflective bowl, and the light reflected toward the reflective bowl is reflected by the reflective bowl and then emitted toward the light incident surface of the light-transmitting portion.

2. The optical system according to claim 1, It is characterized in that The reflecting portion and the reflecting bowl are integrally formed.

3. The optical system according to claim 1, It is characterized in that The light incident surface of the thick-walled light guide is an optical focusing surface, the light source is located at the focus of the optical focusing surface, and the optical focusing surface is configured to make the light entering the thick-walled light guide from the optical focusing surface propagate in parallel in the thick-walled light guide; The light emitting surface of the thick-walled light guide is provided with an optical pattern for light uniformity.

4. The optical system according to claim 1, It is characterized in that The light incident surface of the light-transmitting portion is a plane; The material of the light-transmitting part is glass or optical plastic.

5. The optical system according to claim 1, It is characterized in that The reflecting surface of the reflective bowl is a parabola, and the light source is located at the focus of the parabola.

6. A car light, It is characterized in that Comprising the optical system as claimed in any one of claims 1 to 5.

7. The vehicle lamp according to claim 6, It is characterized in that The vehicle lamp further comprises a housing, a light shielding portion and a lens portion; The light shielding portion is arranged on a side of the light transmitting portion away from the thick-walled light guide; The housing is fixedly connected to the lens portion to form a closed space; The optical system and the light shielding portion are both arranged in the closed space, and the light emitting surfaces of the thick-walled light guide and the light-transmitting portion face the lens portion.

8. The vehicle lamp according to claim 7, It is characterized in that The light source is an LED lamp bead, which is arranged on a PCB board; The PCB board is fixedly connected to the housing; The reflective bowl is fixedly connected to the shell; The thick-walled light guide is fixedly connected to the reflective bowl and the PCB board; The light-transmitting portion is fixedly connected to the light-shielding portion, and the light-shielding portion is fixedly connected to the housing.

9. The vehicle lamp according to any one of claims 7 to 8, It is characterized in that The vehicle light is a turn signal light in a rear tail light.

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