Automobile lamp light-emitting structure and manufacturing method thereof

Abstract

The invention discloses an automobile lamp light-emitting structure and a manufacturing method thereof, and belongs to the technical field of automobile lamp manufacturing. The automobile lamp light-emitting structure comprises a double-color decoration frame, a PCBA fixing support and a PCBA plate; the double-color decoration frame comprises a black light blocking part and a red light transmitting part, and an LED lamp and a driving circuit are arranged on the PCBA board; the double-color decoration frame and the PCBA fixing support are fixed in a clamping mode, and the PCBA board is fixedly connected with the PCBA fixing support in a hot riveting mode. According to the invention, the nanoscale indium-tin alloy metal coating and the random laser etching pattern are arranged, and meanwhile, the thickness of the coating is controlled, so that the bright effect of'starry sky flickering 'is realized; the optical efficiency is improved through the concave-convex texture of the optical structure, and other optical components do not need to be developed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamp manufacturing, and more specifically, to a light-emitting structure of an automobile lamp and a manufacturing method thereof. Background Art

[0002] As an indispensable part of modern cars, automotive lamps play a role far beyond the traditional scope of lighting and signal indication. They are not only key equipment to ensure driving safety at night or in low light conditions, but also an important medium for vehicles to communicate with the outside world, carrying the function of information transmission, such as turn indicators, brake warnings, etc. At the same time, the design of automotive lamps has also become an important embodiment of automotive aesthetics, which can significantly affect the overall appearance and style of the vehicle and is one of the key elements to show the design concept and cultural heritage of the car brand.

[0003] With the popularization of new energy vehicles, especially the rapid development of electric vehicles, the field of automotive design has seen an unprecedented trend of homogenization. Although the application of family-style facial design helps to shorten the product development cycle and reduce costs, it also brings challenges to design innovation, especially in the design of automotive lamps.

[0004] At present, the common lighting methods of new energy vehicle lamps include LED+reflection, LED+direct, LED+plastic optical thick wall, LED+plastic light guide, etc. Although these lighting methods can meet basic lighting needs, they may be relatively ordinary in lighting effect and user experience, and it is difficult to fully demonstrate the competitiveness of the products. Summary of the invention

[0005] An object of the present invention is to provide a light-emitting structure for an automobile lamp and a method for manufacturing the same, so as to solve the problem that the lighting effect and user experience of the commonly used light-emitting methods of the aforementioned automobile lamps are relatively ordinary and it is difficult to fully demonstrate the competitiveness of the product.

[0006] According to a first aspect of the present invention, there is provided a lighting structure of an automobile lamp, comprising a decorative frame, a PCBA (Printed Circuit Board Assembly) fixing bracket and a PCBA board; the decorative frame comprises a light-blocking portion and a light-transmitting portion, and the PCBA board is provided with an LED lamp and a driving circuit; the decorative frame and the PCBA fixing bracket are fixed by snap-fitting, and the PCBA board is fixedly connected to the PCBA fixing bracket by hot riveting.

[0007] Optionally, the decorative frame is configured as a two-color decorative frame, the light-blocking portion is a black light-blocking portion, and the light-transmitting portion is a red light-transmitting portion.

[0008] Optionally, the decorative frame includes an A-side coating structure and a B-side coating structure, the A-side coating structure includes a first PVD coating, and the B-side coating structure includes a black paint coating; the first PVD coating uses an indium tin alloy, the thickness of the first PVD coating is 0.02um~0.15um, and the thickness of the black paint coating is 20um~35um.

[0009] Optionally, the A-side coating structure also includes a primer coating, a local high-gloss black paint coating and a protective paint coating, and the A-side coating structure is, from the inside to the outside, a primer coating, a local high-gloss black paint coating, a first PVD coating and a protective paint coating; the B-side coating structure also includes laser-engraved holes, and the laser-engraved holes are arranged on the outer surface of the B-side coating structure.

[0010] Optionally, the PCBA fixing bracket includes a second PVD coating, and the PCBA fixing bracket is in an L-shaped structure, and the second PVD coating is provided on both surfaces of the L-shaped structure.

[0011] Optionally, the PCBA fixing bracket further includes a first optical structure and a second optical structure, wherein the first optical structure and the second optical structure are respectively arranged on two surfaces of the L-shaped structure and are configured as a concave-convex structure.

[0012] Optionally, the thickness of the second PVD coating is 0.02um~0.15um.

[0013] Optionally, the PCBA board also includes an aluminum substrate, a circuit board and a connector. The aluminum substrate adopts a double-layer aluminum substrate and has a white coating on the surface. The LED lamp is configured as LED red light particles, and the LED red light particles are arranged at intervals on the circuit board. The driving circuit and the connector are arranged on the back of the circuit board.

[0014] Optionally, the arrangement position of the LED red light particles on the circuit board is greater than 2 mm away from the edge.

[0015] According to a second aspect of the present invention, there is provided a method for manufacturing a light-emitting structure of an automobile lamp, comprising the following steps:

[0016] Step 1: spraying primer on the surface A outside the decorative frame to form a primer coating 113;

[0017] Step 2: Perform local highlight spray painting on the outer surface formed in step 1 to form a local highlight black paint coating with a coating thickness of 5um-15um;

[0018] Step 3: Performing PVD sputtering plating on the outer surface formed in step 2 to form a first PVD coating layer, wherein the thickness of the first PVD coating layer is 0.02um to 0.15um;

[0019] Step 4: spraying protective paint on the entire outer surface formed in step 3 to form a protective paint coating (116);

[0020] Step 5: Spray black paint on the outer B surface of the decorative frame to form a black paint coating, the coating thickness of the black paint coating is 20um-35um;

[0021] Step 6: Perform laser engraving on the outer B surface formed in step 5 to engrave the required pattern and complete the preparation of the decorative frame;

[0022] Step 7: For the PCBA fixed bracket, the thickness of the second PVD coating is 0.02um~0.15um;

[0023] Step 8: Assemble the decorative frame, PCBA fixing bracket and PCBA board to obtain the overall light-emitting structure.

[0024] The automotive lamp light-emitting structure and the manufacturing method thereof according to the present disclosure have the following technical effects:

[0025] The double-color decorative frame uses nano-level indium-tin alloy metal plating on the outer A surface, combined with the random laser-engraved pattern on the outer B surface. At the same time, by controlling the thickness of the metal plating, it can achieve a light transmittance of 12%-17%, which can achieve a static metal texture when not lit. At the same time, when the LED light is lit, it emits light outward through the laser-engraved holes, presenting a dazzling effect of "twinkling stars";

[0026] The PCBA fixing bracket not only fixes the two-color decorative frame and the PCBA board, but also plays the role of an optical device. The optical reflection of the PVD coating is used by designing the first optical structure and the second optical structure to improve the optical efficiency and simplify the structure, eliminating the need to develop other optical components.

[0027] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 A schematic cross-sectional view of a light-emitting structure of an automobile lamp provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the coating structure of surface A and surface B of the decorative frame provided in an embodiment of the present invention;

[0031] Figure 3A schematic cross-sectional view of a PCBA fixing bracket provided in an embodiment of the present invention;

[0032] Figure 4 This is a flow chart of a method for manufacturing a light-emitting structure of an automobile lamp provided in an embodiment of the present invention.

[0033] The following are marked in the figure:

[0034] 100. Overall light-emitting structure; 110. Decorative frame; 111. Light-blocking part; 112. Light-transmitting part; 113. Primer coating; 114. Local high-gloss black paint coating; 115. First PVD coating; 116. Protective paint coating; 117. Black paint coating; 118. Laser-carved holes; 120. PCBA fixing bracket; 121. Second PVD coating; 122. First optical structure; 123. Second optical structure; 130. PCBA board; 131. LED lamp. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0038] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] The present invention proposes an embodiment of a light-emitting structure of an automobile lamp. Specifically, Figures 1 to 3 As shown, it includes a decorative frame 110, a PCBA fixing bracket 120 and a PCBA board 130; the decorative frame 110 includes a light-blocking portion 111 and a light-transmitting portion 112, and the PCBA board 130 is provided with an LED lamp and a driving circuit; the decorative frame 110 and the PCBA fixing bracket 120 are fixed by snap connection, and the PCBA board 130 is fixedly connected to the PCBA fixing bracket 120 by hot riveting. Among them, the connection methods of snap connection and hot riveting greatly simplify the assembly process, reduce labor costs and assembly time. The light-blocking and light-transmitting design of the decorative frame, combined with high-performance LEDs and intelligent drivers, can achieve precise light control.

[0040] In the embodiment of the present invention, the decorative frame 110 is configured as a two-color decorative frame 110, the light-blocking portion 111 is a black light-blocking portion, and the light-transmitting portion is a red light-transmitting portion 112. It should be noted that the two-color decorative frame 110 is double-material injection-molded, and is composed of a middle red light-transmitting material and a peripheral black light-blocking material. The black light-blocking portion effectively blocks the overflow of unnecessary light and ensures the accurate projection of light. The red light-transmitting portion has good penetration at night or in foggy days, which helps to improve driving safety.

[0041] In the embodiment of the present invention, the decorative frame 110 includes a coating structure on the A surface and a coating structure on the B surface. The coating structure on the A surface includes a first PVD coating layer 115, and the coating structure on the B surface includes a black paint coating layer 117. The first PVD coating layer 115 is made of an indium tin alloy, and the thickness of the first PVD coating layer 115 is 0.02um~0.15um, so as to achieve a static metal texture when not lit. The thickness of the black paint coating layer 117 is 20um~35um, so that a specific pattern effect can be formed after laser engraving and light can be blocked. It should be noted that the coating structure on the A surface is the side of the decorative frame that faces the outside world and is directly visible, and the coating structure on the B surface is the back or hidden side of the decorative frame.

[0042] In the embodiment of the present invention, the coating structure of surface A further includes a primer coating 113, a local high-gloss black paint coating 114 and a protective paint coating 116. The coating structure of surface A is composed of a primer coating 113, a local high-gloss black paint coating 114, a first PVD coating 115 and a protective paint coating 116 from the inside to the outside. The coating structure of surface B further includes laser-engraved holes 118, which are arranged on the outer surface of the coating structure of surface B. Among them, the thickness of the local high-gloss black paint coating 114 is 5um-15um to cover the obvious boundary between the black and red colors of the two-color injection molding. The thickness control of the first PVD coating 115 can achieve ideal transparency and conductivity; the thickness of the black paint coating can provide better hiding power, weather resistance and wear resistance.

[0043] In an embodiment of the present invention, the PCBA fixing bracket 120 includes a second PVD coating 121, and the PCBA fixing bracket 120 is an L-shaped structure, and the second PVD coating 121 is provided on both sides of the L-shaped structure. The PCBA fixing bracket 120 is made of a white light-transmitting material with a light transmittance of 80%-90%. A nano-scale alloy metal coating is partially used as the second PVD coating 121 to enhance the reflection effect. Among them, the thickness of the second PVD coating 121 is 0.02um~0.15um. The second PVD coating 121 is provided on both sides of the L-shaped structure, which can ensure all-round protection of the bracket and improve the corrosion resistance, conductivity and aesthetics of the bracket.

[0044] In an embodiment of the present invention, the PCBA fixing bracket 120 also includes a first optical structure 122 and a second optical structure 123, which are respectively arranged on the two surfaces of the L-shaped structure, and are both configured as concave-convex texture structures. Specifically, the first optical structure 122 and the second optical structure 123 are configured as special optical pattern structures, which can achieve the effect of random brightening and lighting up the bright light under wide-angle observation. After the LED of the PCBA fixing bracket 120 is lit, multiple total reflections can be performed inside, thereby further enhancing the bright effect of lighting up. Specifically, the L-shaped structure provides a stable support base for the PCBA fixing bracket 120, and is convenient for connection and fixation with other components. The L-shaped structure enables the optical structure to be more flexibly arranged on the two surfaces of the PCBA fixing bracket 120, thereby achieving all-round guidance and regulation of light.

[0045] The first optical structure 122 is arranged on one surface of the L-shaped structure, usually located directly in front of the LED particles. The first optical structure 122 is designed with a concave-convex texture, which can change the propagation path of the light, so that the light undergoes multiple total reflections and scatterings when the LED is lit, thereby achieving a random brightening effect, which not only improves the uniformity of the light, but also increases the layering of the light, making the lamp more dazzling when it is lit.

[0046] The second optical structure 123 is arranged on the other side of the L-shaped structure, usually located in the front area just below the PCBA fixing bracket. Similar to the first optical structure 122, the second optical structure 123 also changes the propagation path of light through concave and convex textures. However, its design focuses more on achieving a bright and dazzling effect when observed at a wide angle. By adjusting the shape, size and distribution of the texture, the second optical structure 123 can guide light within a wide angle range, making it appear brighter and more flickering in the observer's line of sight.

[0047] In an embodiment of the present invention, the PCBA board 130 further includes an aluminum substrate, a circuit board and a connector. The aluminum substrate adopts a double-layer aluminum substrate and has a white coating on the surface. The LED lamp is configured as LED red light particles, and the LED red light particles are arranged on the circuit board at intervals. The back of the circuit board is provided with a driving circuit and a connector. The design of the double-layer aluminum substrate greatly improves the heat dissipation performance of the PCBA board, ensuring that the LED red light particles and the driving circuit can still work stably in a high temperature environment. The aluminum substrate and the white coating increase the corrosion resistance and wear resistance of the PCBA board 130.

[0048] In the embodiment of the present invention, the arrangement position of the LED red light particles on the circuit board is greater than 2 mm away from the edge, which helps to ensure a good heat dissipation effect.

[0049] Furthermore, the breathing and flickering function of LED particles can be realized by PWM (pulse width modulation) regulation through the lamp controller, creating the effect of twinkling stars in the night sky. PWM regulation technology can also effectively avoid the overheating problem of LED particles caused by long-term operation at high brightness, thereby extending the service life of LED particles. Through the lamp controller, users can easily adjust the frequency, period and other parameters of breathing flicker to achieve personalized lighting effects.

[0050] The present invention also provides an embodiment of a method for manufacturing a light-emitting structure of an automobile lamp, specifically as follows Figure 4 As shown, the following steps are included:

[0051] Step 1: spraying primer on the A surface of the decorative frame 110 to form a primer coating 113; wherein the two-color decorative frame 110 is injection molded by double materials (black light-blocking PC + red light-transmitting PC), and the A surface thereof is first sprayed with primer as a whole;

[0052] Step 2: Perform local high-gloss spray painting on the outer surface formed in step 1 to form a local high-gloss black paint coating 114 with a coating thickness of 5um-15um; it should be noted that the effect of "gradient black paint" is achieved by controlling the spraying speed and the spraying direction at the same time to cover the obvious boundary between the black and red colors of the two-color injection molding;

[0053] Step 3: Perform PVD sputtering plating on the outer surface formed in step 2 as a whole to form a first PVD coating layer 115, and the film thickness of the first PVD coating layer 115 is 0.02um~0.15um; it should be noted that the vacuum plating nano-scale indium tin alloy metal process is adopted as a whole, so that the A surface presents a static effect of metallic texture when it is not luminous, and can also play a role in shielding the rear structure. The nano-scale alloy metal coating is realized by PVD sputtering plating method, and the coating adopts indium tin alloy, and the transmittance needs to be controlled between 10% and 17%;

[0054] Step 4: spray protective paint on the outer surface formed in step 3 as a whole to form a protective paint coating 116; based on the above steps, the process path of surface A is spraying primer - local high-gloss black spraying - overall PVD sputtering - spraying protective paint;

[0055] Step 5: spraying black paint on the outer surface B of the decorative frame 110 to form a black paint coating 117, the coating thickness of the black paint coating 117 is 20um-35um;

[0056] Step 6: Perform laser engraving on the outer surface B formed in step 5 to engrave a desired pattern, thereby completing the preparation of the decorative frame 110;

[0057] Step 7: Perform PVD sputtering plating on the outer surface of the PCBA fixing bracket 120 to form a second PVD coating layer 121, and the film thickness of the second PVD coating layer 121 is 0.02um-0.15um;

[0058] Step 8: Assemble the decorative frame 110 , the PCBA fixing bracket 120 , and the PCBA board 130 to obtain the overall light-emitting structure 100 .

[0059] The light-emitting structure manufacturing method of the embodiment of the present invention achieves multiple technical effects such as product aesthetics, durability, wear resistance, and personalized pattern display through the steps of primer spraying, local high-gloss black spray painting, PVD sputtering plating, protective paint spraying, black paint spraying, and laser engraving.

[0060] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. A light-emitting structure of an automobile lamp, characterized in that: The invention comprises a decorative frame (110), a PCBA fixing bracket (120) and a PCBA board (130); the decorative frame (110) comprises a light blocking portion (111) and a light transmitting portion (112); the PCBA board (130) is provided with an LED lamp (131) and a driving circuit; the decorative frame (110) and the PCBA fixing bracket (120) are fixed by snap-fitting; the PCBA board (130) is fixedly connected to the PCBA fixing bracket (120) by means of hot riveting.

2. The automotive lamp light emitting structure according to claim 1, characterized in that: The decorative frame (110) is configured as a two-color decorative frame, the light-blocking portion (111) is a black light-blocking portion, and the light-transmitting portion is a red light-transmitting portion (112).

3. The automotive lamp light emitting structure according to claim 2, characterized in that: The decorative frame (110) comprises an A-surface coating structure and a B-surface coating structure, the A-surface coating structure comprising a first PVD coating layer (115), and the B-surface coating structure comprising a black paint coating layer (117); the first PVD coating layer (115) is made of an indium tin alloy, the thickness of the first PVD coating layer (115) is 0.02 um to 0.15 um, and the thickness of the black paint coating layer (117) is 20 um to 35 um.

4. The automotive lamp light-emitting structure according to claim 3, characterized in that: The A-side coating structure further comprises a primer coating (113), a local high-gloss black paint coating (114), and a protective paint coating (116), wherein the A-side coating structure comprises, from the inside to the outside, a primer coating (113), a local high-gloss black paint coating (114), a first PVD coating (115), and a protective paint coating (116); the B-side coating structure further comprises a laser-engraved hole (118), wherein the laser-engraved hole (118) is arranged on the outer surface of the B-side coating structure.

5. The automotive lamp light emitting structure according to claim 1, characterized in that: The PCBA fixing bracket (120) comprises a second PVD coating layer (121); the PCBA fixing bracket (120) is in an L-shaped structure, and the second PVD coating layer (121) is provided on both surfaces of the L-shaped structure.

6. The automotive lamp light emitting structure according to claim 5, characterized in that: The PCBA fixing bracket (120) further comprises a first optical structure (122) and a second optical structure (123), wherein the first optical structure (122) and the second optical structure (123) are respectively arranged on two surfaces of the L-shaped structure and are configured as a concave-convex structure.

7. The automotive lamp light emitting structure according to claim 5, characterized in that: The thickness of the second PVD coating layer (121) is 0.02 um to 0.15 um.

8. The automotive lamp light-emitting structure according to claim 1, characterized in that: The PCBA board (130) further comprises an aluminum substrate, a circuit board and a connector; the aluminum substrate is a double-layer aluminum substrate and has a white coating on its surface; the LED lamp is configured as LED red light particles, which are arranged at intervals on the circuit board; and the drive circuit and the connector are arranged on the back of the circuit board.

9. The automotive lamp light emitting structure according to claim 8, characterized in that: The arrangement position of the LED red light particles on the circuit board is greater than 2 mm away from the edge.

10. A method for manufacturing a light-emitting structure of an automobile lamp, characterized in that: The following steps are involved: Step 1: spraying primer on the surface A outside the decorative frame (110) to form a primer coating 113; Step 2: Perform local high-gloss spray painting on the outer surface formed in step 1 to form a local high-gloss black paint coating (114) with a coating thickness of 5um-15um; Step 3: performing PVD sputtering on the outer surface formed in step 2 to form a first PVD coating layer (115), wherein the thickness of the first PVD coating layer (115) is 0.02 um to 0.15 um; Step 4: spraying protective paint on the entire outer surface formed in step 3 to form a protective paint coating (116); Step 5: spraying black paint on the outer surface B of the decorative frame (110) to form a black paint coating (117), wherein the coating thickness of the black paint coating (117) is 20um-35um; Step 6: Performing laser engraving on the outer surface B formed in step 5 to engrave a desired pattern, thereby completing the preparation of the decorative frame (110); Step 7: Performing PVD sputtering on the outer surface of the PCBA fixing bracket (120) to form a second PVD coating (121), wherein the thickness of the second PVD coating (121) is 0.02 um to 0.15 um; Step 8: Assemble the decorative frame (110), the PCBA fixing bracket (120), and the PCBA board (130) to obtain an overall light-emitting structure (100).

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