Novel light guide-in light end structure

Abstract

The utility model discloses a novel light guide-in light end structure. The novel light guide-in light end structure comprises a lampshade, a shell, a light guide component and a PCB module, wherein the lampshade and the shell are connected in a sealed mode to form a cavity, and the light guide component and the PCB module are arranged in the cavity. The light guide component comprises two curved light conductors which are integrally and symmetrically formed, the curvature radius of each curved light conductor is R, the light guide diameter is r, and R / r is larger than or equal to 10; the PCB module comprises a PCB and a single LED light source arranged on the PCB, the LED light source is located at the joint of the two curved light conductors, and light emitted by the LED light source can enter the two curved light conductors to be totally reflected and lightened. According to the LED lamp, the problem that a dark space exists above the light inlet end can be solved, one LED light source is adopted, the chromaticity difference of the whole lamp is reduced, and the lighting effect is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamp light guides, in particular to a novel light inlet light end structure. Background Art

[0002] At present, in the field of vehicle lamps, for signal lamps with extremely narrow and continuous light-emitting areas in appearance requirements on the market, that is, signal lamps with a light-emitting area width ≤ 5 mm, the vast majority of optical solutions adopt arranging one or two continuous light guides directly below the light-emitting area, and the light source directly irradiates the light inlet end face of the light guide. Such traditional light guide structure solutions have some defects: First, the bending curvature radius at the light inlet end of the traditional light guide is relatively small, so the light efficiency is low and the light loss is large; Second, there are dark areas in the light-transmitting area above the light inlet end of the traditional light guide, affecting the brightness uniformity of the entire light-transmitting area; Third, the two light guides of the traditional light guide structure are split, and two LEDs are used as light sources. Although two LEDs of the same model are used, there are certain chromaticity differences in the mass-produced LEDs themselves, resulting in chromaticity differences in the entire light-transmitting area of the lamp, and further affecting the consistency of chromaticity matching with surrounding light-emitting lamps of the same function; Fourth, the traditional light inlet light end structure requires a light mixing process, otherwise the optical chromaticity cannot meet the design requirements, so the space requirement in the light inlet direction is large. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a novel light inlet light end structure, which can optimize the dark area problem existing above the light inlet end, adopt one LED light source, reduce the chromaticity difference of the whole lamp, and have higher light efficiency.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A novel light inlet light end structure, which includes a lamp cover and a housing that are hermetically connected to form a cavity, a light guide member and a PCB module arranged in the cavity;

[0006] The light guide member includes two integrally symmetrically formed curved light conductors, the curvature radius of the curved light conductor is R, and the light guide diameter is r, then R / r ≥ 10;

[0007] The PCB module includes a PCB board and a single LED light source arranged thereon. The LED light source is located at the junction of the two curved light conductors, and the light emitted by the LED light source can enter the two curved light conductors for total reflection and lighting.

[0008] Further, an light inlet is opened at the junction of the two curved light conductors. The light inlet has two light inlet end faces, and the included angle between the two light inlet end faces is 90 degrees.

[0009] Furthermore, a fillet is provided at the junction of the two light-incident end faces.

[0010] Furthermore, light guide teeth are provided on the lower surfaces of the two curved light conductors.

[0011] Furthermore, the lamp cover includes a non-light-transmitting area and a light-transmitting area formed by two-color injection molding.

[0012] Furthermore, it further includes a radiator fixed to the bottom of the housing, and a sealing ring provided between the radiator and the housing.

[0013] Furthermore, the sealing ring is made of skin-foamed rubber.

[0014] Furthermore, the PCB board is attached to the radiator by screws.

[0015] Furthermore, the lamp cover and the housing are bonded together by a sealant.

[0016] Adopting the above technical solutions, the present utility model has the following beneficial effects:

[0017] 1. The light guide member of the present utility model is integrally formed by two curved light conductors, and the curvature radius R / light guide diameter r ≥ 10 is designed. The bending degree of the curved light conductor is not too large, and the light emitted by the LED light source undergoes total internal reflection in the curved light conductor, so that there is no problem of dark areas in the light-transmitting area above the light-incident end, improving the uniformity of the brightness of the entire light-transmitting area.

[0018] 2. The designed curved light conductor of the present utility model has an increased curvature radius compared with the traditional light guide, and the overall shape tends to be flattened. Using one LED light source to simultaneously light up two curved light conductors can reduce light loss and improve light efficiency. At the same time, on the premise of maintaining the same brightness, two curved light conductors are integrally formed and a light-incident port is provided to form two light-incident end faces with an included angle. The LED light source is centered to achieve symmetric light incidence on both sides, so that the number of LED beads can be reduced from two to one, thus significantly optimizing the problem of the chromaticity difference of the entire lamp caused by the chromaticity difference of the two LEDs itself and improving the consistency of the chromaticity matching with the surrounding lighting fixtures.

[0019] 3. Through the design of two curved light conductors, the present utility model makes the light incidence between the LED light source and the two light-incident end faces inclined, which is different from the vertical incident end face of the traditional light guide structure. Therefore, there is no need for a light mixing process, optimizing the problem of large space requirements in the light incidence direction, and the overall light guide structure is smaller in size. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of an embodiment of the present utility model;

[0021] Figure 2These are the three - view drawings of the embodiment of the present utility model;

[0022] Figure 3 It is Figure 2 the schematic cross - sectional structure diagram of the A - A section in

[0023] Figure 4 It is Figure 2 the schematic cross - sectional structure diagram of the B - B section in

[0024] Figure 5 It is Figure 3 the enlarged schematic diagram of the structure of part C in

[0025] Figure 6 the optical path schematic diagram of the embodiment of the present utility model;

[0026] Figure 7 the exploded schematic diagram of the structure of the embodiment of the present utility model;

[0027] Figure 8 It is the schematic diagram of the existing optical waveguide structure;

[0028] Figure 9 It is the optical path schematic diagram of the existing optical waveguide structure;

[0029] Among them, 1. lamp cover; 2. curved light conductor; 3. screw; 4. LED light source; 5. PCB board; 6. housing; 7. sealing ring; 8. radiator; 9. non - light - transmitting area; 10. light - transmitting area; 11. light - incident end face; 12. light - guiding teeth. Specific embodiments

[0030] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is given according to specific embodiments and in combination with the accompanying drawings.

[0031] First, refer to Figure 8 and Figure 9 for the existing traditional optical waveguide structure. The bending radius of curvature at the light - incident end of the light guide is relatively small, that is, the bending degree is relatively large, so the light efficiency is low and the light loss is large. At the same time, there will be a dark area D on the curved light conductor 2, resulting in a dark area E in the light - transmitting area 10 above the light - incident end, affecting the brightness uniformity of the entire light - transmitting area. And this traditional optical waveguide structure is a split type, using two LED light sources 4 for direct irradiation. Although two LED lights of the same model are used, there are certain chromaticity differences in the mass - produced LEDs themselves, resulting in chromaticity differences in the entire light - transmitting area of the lamp, and further affecting the consistency of chromaticity matching with the surrounding luminous lamps of the same function. In addition, the traditional light - incident end structure of the light guide requires a light - mixing process, so there is a relatively long light - mixing area F, and a large space is required in the light - incident direction, resulting in a larger overall lamp size and internal space, which is not conducive to the development trend of flattening.

[0032] Therefore, as Figure 1-7 shown, in this embodiment, a new type of optical input optical terminal structure is provided, which mainly consists of components such as a lamp cover 1, a housing 6, an optical guiding member, a PCB module, a sealing ring 7, and a radiator 8. Among them, the lamp cover 1 and the housing 6 are adhesively fixed with sealant and fixed by a back glue process to achieve the internal sealing of the entire lamp cavity; both the optical guiding member and the PCB module are arranged inside the entire lamp cavity; the lamp cover 1 further includes a non-light-transmitting area 9 and a light-transmitting area 10, and the two can be formed by two-color injection molding. The non-light-transmitting area 9 is made of non-light-transmitting material to form a light-blocking effect, and the light-transmitting area 10 is made of milky white light-transmitting material for light transmission after lighting.

[0033] Specifically, the optical guiding member includes two integrally symmetrically formed curved light conductors 2. Let the radius of curvature of the curved light conductor 2 be R and the light guide diameter be r, then R / r ≥ 10. For example, in this embodiment, R / r = 10. In this way, it is to prevent the radius of curvature of the light guide bending part from being too small, which may cause light leakage and reduce the system light efficiency, and there are obvious defects in lighting at the bending part. Therefore, it is required that the bending radius cannot be too small. In this embodiment, R / r = 10 is preferred, which meets the optical design standard of the light guide.

[0034] At the same time, the PCB module includes a PCB board 5 and a single LED light source 4 arranged thereon. The LED light source 4 is attached to the surface of the PCB board 5 by electronic patch, and the LED light source 4 is located at the junction of the two curved light conductors 2. The light emitted by the LED light source 4 can enter the two curved light conductors 2 and undergo total internal reflection to be lit. The PCB board 5 is locked to the radiator 8 by screws 3, and the radiator 8 is locked and fixed to the housing 6 by screws. The sealing ring 7 is pre-installed in the groove of the radiator 8 in advance. After the radiator 8 is fixed to the housing 6, the sealing ring 7 will be squeezed and fixed between the housing 6 and the radiator 8, thereby playing a sealing role. The material of the sealing ring 7 is preferably selected as skin-forming foamed rubber.

[0035] More specifically, in this embodiment, a light inlet is opened at the junction of the two curved light conductors 2. The light inlet has two light inlet end faces 11, and the included angle between the two light inlet end faces 11 is 90 degrees. The included angle junction of the two light inlet end faces 11 is opened as a rounded corner. In this way, with one LED light source 4, the light emitted by the LED light source 4 can be emitted to the two light inlet end faces 11 on both sides. The light enters the two curved light conductors 2 and undergoes total internal reflection, thereby lighting the entire light conductor structure. And light guide teeth 12 are formed on the lower surfaces of the two curved light conductors 2 to improve the lighting uniformity effect.

[0036] Through the above design, it can be seen that the light guide member of this embodiment is integrally formed by two curved light conductors 2, and the curvature radius R / light guide diameter r≥10 is designed. Then, the bending degree of the curved light conductor 2 is not too large, and the light emitted by the LED light source 4 undergoes total internal reflection within the curved light conductor 2, so that there will be no problem of dark areas in the light-transmitting area 10 above the light-incident end, improving the uniformity of the brightness of the entire light-transmitting area.

[0037] Moreover, the designed curved light conductor 2 in this embodiment has an increased curvature radius compared with the traditional light guide, and the whole tends to be flattened. Using one LED light source 4 to light two curved light conductors 2 simultaneously can reduce the light loss and improve the light efficiency. At the same time, on the premise of maintaining the same brightness, two curved light conductors 2 are designed to be integrally formed, and light-incident ports are opened to form two light-incident end faces 11 with an included angle. The LED light source 4 is centered to achieve symmetric light incidence on both sides, so that the number of LED beads can be reduced from two to one, thus significantly optimizing the problem of the chromaticity difference of the whole lamp caused by the chromaticity difference of the two LEDs themselves and improving the consistency of the chromaticity matching with the surrounding light-emitting lamps with the same function.

[0038] In addition, through the design of two curved light conductors 2, the light incidence between the LED light source 4 and the two light-incident end faces 11 is inclined, which is different from the vertical incident end face of the traditional light guide structure. Therefore, there is no need for a light mixing process, optimizing the problem of large space requirements in the light incidence direction, reducing the internal space, and making the overall light guide structure smaller in size.

[0039] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0040] The above specific embodiments further elaborate on the technical problems solved, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only specific embodiments of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel light-introducing optical end structure, characterized in that: It comprises a lampshade (1) and a housing (6) which are sealed and connected to form a cavity, and a light-guiding component and a PCB module arranged in the cavity; The light guide component comprises two curved light guide bodies (2) formed in one piece and symmetrically, the curvature radius of the curved light guide body (2) is R, the light guide diameter is r, and R / r≥10; The PCB module comprises a PCB board (5) and a single LED light source (4) arranged thereon, wherein the LED light source (4) is located at the intersection of two curved light conductors (2), and light emitted by the LED light source (4) can be projected into the two curved light conductors (2) to be totally reflected and illuminated.

2. A novel light guide light end structure according to claim 1, characterized in that: A light entrance is provided at the junction of the two curved light conductors (2), the light entrance having two light entrance end faces (11), and the angle between the two light entrance end faces (11) is 90 degrees.

3. The novel light guide light end structure according to claim 2 is characterized in that: A rounded corner is provided at the junction of the two light incident end faces (11).

4. The novel light guide light end structure according to claim 1, characterized in that: Light guide teeth (12) are arranged on the lower surfaces of the two curved light guide bodies (2).

5. The novel light guide light end structure according to claim 1 is characterized in that: The lampshade (1) comprises a non-light-transmitting area (9) and a light-transmitting area (10) formed by double-color injection molding.

6. The novel light guide light end structure according to claim 1 is characterized in that: It also includes a radiator (8) fixed to the bottom of the shell (6), and a sealing ring (7) arranged between the radiator (8) and the shell (6).

7. The novel light guide light end structure according to claim 6 is characterized in that: The material of the sealing ring (7) is crusted foam rubber.

8. The novel light guide light end structure according to claim 6 is characterized in that: The PCB board (5) is fixed to the heat sink (8) by means of screws (3).

9. The novel light guide light end structure according to claim 1, characterized in that: The lampshade (1) and the housing (6) are bonded together by means of a sealant.

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