Integrated multifunctional headlamp module, system and control method

Abstract

The invention discloses an integrated multifunctional headlamp module and system and a control method, and belongs to the technical field of vehicle lamp illumination. The integrated multifunctional headlamp module comprises a Micro LED light source, a first lens, a second lens, a third lens, a fourth lens, an LED light source, a reflection bowl, a low beam cut-off line baffle and a fifth lens. The fourth lens comprises a fourth lens HD area and a fourth lens low beam area. HD areas of the Micro LED light source, the first lens, the second lens, the third lens and the fourth lens form an HD module; the LED light source is located at the focus position of the reflection bowl, the low-beam cut-off line baffle is located at the focus position combined by the low-beam areas of the fifth lens and the fourth lens, and the LED light source, the reflection bowl, the low-beam cut-off line baffle, the low-beam areas of the fifth lens and the fourth lens form a low-beam module. The structure compactness and the modeling consistency of the headlamp module are enhanced, the cost is reduced, meanwhile, multiple lamp functions can be achieved, and the driving safety and interactivity are enhanced.

Description

Technical Field

[0001] The present invention relates to an integrated multifunctional headlamp module, system and control method, and belongs to the technical field of vehicle lighting. Background Art

[0002] Currently, Micro LED headlight technology primarily consists of a Micro LED light-emitting chip and an imaging lens assembly. Micro LEDs are tiny light-emitting diodes, measuring in the micron range. This headlight module delivers high brightness and high-contrast lighting. Compared to traditional light sources, they offer higher luminous efficiency, more efficiently converting electrical energy into light, thereby reducing energy consumption. Furthermore, they enable precise beam control. Individually controlling numerous Micro LED units allows for flexible adjustment of beam shape, angle, and intensity. For example, during driving, the lighting pattern can be dynamically adjusted based on varying road conditions (such as curves, uphill slopes), and traffic situations (such as meeting or following vehicles), reducing glare for other road users while improving the driver's field of view. Micro LED modules offer both size and design flexibility, facilitating more compact headlight designs. Furthermore, they can be designed in a variety of shapes to suit the specific vehicle styling requirements, providing greater creative scope for exterior design. From the perspective of reliability, Micro LED has a long service life and strong stability. It can withstand complex environmental factors such as vibration and temperature changes during vehicle driving, reducing the frequency of maintenance and replacement.

[0003] However, the manufacturing process of Micro LED chips is complex, including chip growth and transfer, requiring high-precision equipment and advanced processes. Furthermore, its packaging technology also requires high standards. These factors lead to high production costs, making the product price high and limiting large-scale application. Therefore, how to effectively reduce the cost of headlamp modules has become an urgent problem to be solved. Secondly, in existing technologies, the level of integration of headlamp modules using Micro LED is low, and the number of lenses in the lamp is large, resulting in a wide range of car surface shapes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an integrated multifunctional headlamp module, system and control method, which enhances the structural compactness and shape consistency of the headlamp module, reduces costs, and can realize multiple lamp functions, thereby enhancing driving safety and interactivity.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] On one hand, the present invention provides an integrated multifunctional headlamp module, which includes a Micro LED light source, a first lens, a second lens, a third lens, a fourth lens, an LED light source, a reflector bowl, a low-beam cutoff baffle, and a fifth lens, wherein the fourth lens includes a fourth lens HD area and a fourth lens low-beam area;

[0007] The Micro LED light source, the first lens, the second lens, the third lens, and the fourth lens HD region are sequentially arranged along the optical axis from the object side to the image side. The Micro LED light source, the first lens, the second lens, the third lens, and the fourth lens HD region constitute an HD module. The first lens, the second lens, and the fourth lens HD region all have positive optical power, and the third lens has negative optical power.

[0008] The LED light source is located at the focal position of the reflective bowl, and the low beam cutoff line baffle is located at the focal position of the combination of the low beam areas of the fifth lens and the fourth lens. The LED light source, the reflective bowl, the low beam cutoff line baffle, the fifth lens, and the low beam areas of the fourth lens constitute a low beam module. When the LED light source is turned on, light is emitted toward the reflective bowl, and the light is collected by the reflective bowl and projected onto the low beam cutoff line baffle. After being blocked by the low beam cutoff line baffle, the remaining light is refracted through the low beam areas of the fifth lens and the fourth lens in sequence to form a low beam light pattern.

[0009] Furthermore, the object side surface and image side surface of the first lens are S1 surface and S2 surface respectively, the object side surface and image side surface of the second lens are S3 surface and S4 surface respectively, the object side surface and image side surface of the third lens are S5 surface and S6 surface respectively, the object side surface and image side surface of the HD area of ​​the fourth lens are S7 surface and S8 surface respectively, the object side surface and image side surface of the low beam area of ​​the fourth lens are S9 surface and S10 surface respectively, and the object side surface and image side surface of the fifth lens are S11 surface and S12 surface respectively.

[0010] Furthermore, the S1 surface is a concave surface, the S2 surface is a convex surface, the S3 surface and the S4 surface are both convex surfaces, the S5 surface is a concave surface, the S6 surface is a convex surface, the S7 surface is a convex surface, the S8 surface is a plane, the S9 surface is a convex surface, and the S10 surface is a plane.

[0011] Another aspect of the present invention provides an integrated multifunctional headlamp system, which includes a storage module, a control module, a communication module, a drive module and a multifunctional headlamp module;

[0012] The storage module is used to store vehicle light pattern image data;

[0013] The control module is used to read the vehicle light pattern image data in the storage module, process the vehicle light pattern image data, and then send a light control command to the communication module;

[0014] The communication module is used to receive the lighting control command and transmit it to the driving module;

[0015] The driving module is used to drive the multifunctional headlamp module to illuminate the vehicle light pattern according to the light control command;

[0016] The multifunctional headlamp module is used for performing low beam type illumination and high definition light type illumination.

[0017] Furthermore, the HD light type includes an auxiliary low beam light type, a high beam light type, an ADB light type, an AFS light type and a projection light type.

[0018] Another aspect of the present invention provides an integrated multifunctional headlamp control method, which comprises the following steps:

[0019] Step S1, preloading and decoding vehicle light pattern image data;

[0020] Step S2: performing double-buffer pipeline scheduling and grayscale value bitmap stream calculation based on the decoded vehicle light pattern image data;

[0021] Step S3: generating a light driving signal based on the vehicle light pattern image data after double-buffered pipeline scheduling and grayscale value bitmap stream calculation;

[0022] Step S4: The multifunctional headlamp module performs lighting according to the light driving signal.

[0023] Furthermore, the grayscale value bitmap stream calculation in step S2 specifically includes the following steps:

[0024] Step S21, dividing the headlight pattern image into a plurality of pixel blocks;

[0025] Step S22: Calculate the grayscale value of each pixel block;

[0026] Step S23: Generate a grayscale value bit stream map according to the grayscale value of each pixel block.

[0027] Furthermore, the grayscale value of each pixel block is calculated as follows:

[0028]

[0029] Where EH[m,n] is the grayscale value corresponding to the pixel block in the mth row and nth column of the headlight pattern image;

[0030] E[m,n] is the energy value corresponding to the pixel block in the mth row and nth column of the headlight pattern image;

[0031] E MAX is the maximum energy value corresponding to the pixel block in the headlight pattern image;

[0032] m is the pixel block that traverses all rows;

[0033] n is the pixel block that traverses all columns.

[0034] Furthermore, in step S3, generating a light driving signal according to the vehicle light pattern image data after double-buffered pipeline scheduling and grayscale value bitmap stream calculation includes the following steps:

[0035] Convert the grayscale value bit stream image into the driving current of the multi-function headlamp module.

[0036] Furthermore, the calculation formula of the driving current of the multifunctional headlamp module is as follows:

[0037]

[0038] Among them, I drive [m,n] is the driving current of the multi-function headlamp module;

[0039] EH[m,n] is the grayscale value corresponding to the pixel block in the mth row and nth column of the headlight pattern image;

[0040] I max is the maximum driving current;

[0041] m is the pixel block that traverses all rows;

[0042] n is the pixel block that traverses all columns.

[0043] By adopting the above technical solution, the present invention has the following beneficial effects:

[0044] The headlamp module of the present invention includes an HD module and a low-beam module. While the HD module and the low-beam module are independent in their optical paths, they share a common outer lens. This improves the integration level of the headlamp module and integrates multiple optical functions into a single module, reducing production costs and enhancing the structural compactness and styling consistency of the headlamp module, resulting in a more minimalist and stylish design. By utilizing precise pixel control of the Micro LED light source, the headlamp module features low-beam, high-beam, ADB, AFS, and projection functions, enhancing driving safety and interactivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic structural diagram of the integrated multifunctional headlamp module of the present invention;

[0046] Figure 2 This is a functional block diagram of the integrated multifunctional headlamp system of the present invention;

[0047] Figure 3 The auxiliary low beam pattern diagram of the present invention;

[0048] Figure 4 The light pattern of the present invention is a combination of low beam and projection;

[0049] Figure 5 The light pattern of the present invention is a combination of low beam, high beam and projection;

[0050] Figure 6 This is a flow chart of the integrated multi-functional headlamp control method of the present invention. DETAILED DESCRIPTION

[0051] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0052] Example 1

[0053] like Figure 1 As shown, this embodiment provides an integrated multifunctional headlamp module, which includes a Micro LED light source 1, a first lens 2, a second lens 3, a third lens 4, a fourth lens 5, an LED light source 6, a reflective bowl 7, a low beam cutoff baffle 8 and a fifth lens 9, wherein the fourth lens 5 includes a fourth lens HD area 51 and a fourth lens low beam area 52.

[0054] like Figure 1 As shown, the Micro LED light source 1, first lens 2, second lens 3, third lens 4, and fourth lens HD region 51 are arranged sequentially along the optical axis a from the object side to the image side. The Micro LED light source 1, first lens 2, second lens 3, third lens 4, and fourth lens HD region 51 constitute an HD module. The first lens 2, second lens 3, third lens 4, and fourth lens HD region 51 all have positive optical power, while the third lens 4 has negative optical power. The Micro LED light source 1 has greater than or equal to 10,000 pixels, enabling precise pixel control and multiple lamp function switching, increasing the functional diversity of the headlamp module.

[0055] like Figure 1As shown, the LED light source 6 is located at the focal point of the reflector bowl 7, and the low-beam cutoff baffle 8 is located at the focal point of the fifth lens 9 and the low-beam region 52 of the fourth lens. The LED light source 6, reflector bowl 7, low-beam cutoff baffle 8, fifth lens 9, and the low-beam region 52 of the fourth lens constitute the low-beam module. Both the low-beam region 52 of the fourth lens and the fifth lens 9 have positive optical power. The reflector bowl 7 is made of PC and coated with aluminum. It collects and collimates the light beam emitted by the LED light source 6. The low-beam cutoff baffle 8 is made of aluminum and blocks the light beam, forming a low-beam cutoff line. When the LED light source 6 is turned on, light is directed toward the reflector bowl 7. The light is collected by the reflector bowl 7 and then projected onto the low-beam cutoff baffle 8. After being blocked by the low-beam cutoff baffle 8, the remaining light is refracted through the fifth lens 9 and the low-beam region 52 of the fourth lens, forming the low-beam light pattern.

[0056] The HD module and the low-beam module are divided into an HD optical path and a low-beam optical path that do not interfere with each other, but share the fourth lens 5, so that the light of the HD optical path and the low-beam optical path are ultimately emitted from the fourth lens 5, thereby improving the integration level of the headlamp module, being able to integrate multiple optical functions into one headlamp module, reducing production costs, enhancing the structural compactness and styling consistency of the headlamp module, and making the headlamp module more simple and stylish in styling.

[0057] Specifically, the object side surface and image side surface of the first lens 2 are S1 surface and S2 surface respectively, the object side surface and image side surface of the second lens 3 are S3 surface and S4 surface respectively, the object side surface and image side surface of the third lens 4 are S5 surface and S6 surface respectively, the object side surface and image side surface of the fourth lens HD region 51 are S7 surface and S8 surface respectively, the object side surface and image side surface of the fourth lens low beam region 52 are S9 surface and S10 surface respectively, and the object side surface and image side surface of the fifth lens 9 are S11 surface and S12 surface respectively.

[0058] Specifically, the S1 surface is concave, the S2 surface is convex, the S3 surface and the S4 surface are both convex, the S5 surface is concave, the S6 surface is convex, the S7 surface is convex, the S8 surface is flat, the S9 surface is convex, the S10 surface is flat, and the shapes of the S11 surface and the S12 surface are not limited.

[0059] Example 2

[0060] like Figure 2 As shown, this embodiment provides an integrated multifunctional headlamp system, which includes a storage module, a control module, a communication module, a drive module and the multifunctional headlamp module as in the first embodiment.

[0061] Specifically, the storage module is an SPI Flash memory, which is used to store vehicle light pattern image data.

[0062] Specifically, the control module is an MCU that reads and processes the headlight pattern image data from the storage module, and then sends lighting control commands to the communication module. The control module integrates a decoding module and a dual-channel SRAM buffer, which is used for pipeline scheduling of the headlight pattern image data.

[0063] Specifically, the communication module is used to receive the lighting control command and transmit it to the driving module. The communication module can use an LVDS serial interface for differential signal transmission.

[0064] Specifically, the driver module is an ASIC chip that drives the multi-function headlamp module to produce headlight patterns according to lighting control commands. The ASIC chip integrates an LVDS decoder, a pixel mapping table, and a PWM drive circuit. The LVDS decoder receives and decodes low-voltage differential signals; the pixel mapping table represents the mapping relationship between grayscale values ​​and drive current; and the PWM drive circuit generates a pulse-width modulated signal to directly drive the multi-function headlamp module.

[0065] Specifically, the multifunctional headlamp module includes a low beam module and an HD module, which are used for low beam and HD light type illumination. The HD light type includes auxiliary low beam, high beam, ADB, AFS and projection light types. The HD module uses Micro LED light sources, combined with the design of storage modules, control modules, communication modules and drive modules, which can flexibly adjust the shape, angle and intensity of the light beam, and can realize the switching of various lighting functions such as low beam, high beam, ADB, AFS and projection, thereby increasing driving safety and interactivity. Figure 3 As shown, it is the auxiliary low beam type; Figure 4 As shown, it is a light pattern that combines low beam and projection; Figure 5 As shown, it is a light pattern combining low beam, high beam and projection.

[0066] Example 3

[0067] like Figure 6 As shown, this embodiment provides a headlamp control method using the integrated multifunctional headlamp system of the second embodiment, which includes the following steps:

[0068] Step S1: preloading and dynamically decoding the vehicle light pattern image data, specifically including block-by-block interleaved reading and real-time decompression of the vehicle light pattern image data, and dividing the vehicle light pattern image data into subframes that can be processed by the ASIC.

[0069] Step S2: Perform double-buffer pipeline scheduling and grayscale bitmap flow calculation based on the decoded vehicle light pattern image data. Specifically, the double-buffer pipeline scheduling includes reading data from the storage module through buffer pool A and sending data to the communication module through buffer pool B.

[0070] Specifically, the grayscale value bitmap stream calculation of this embodiment includes the following steps:

[0071] Step S21, dividing the headlight pattern image into M×N pixel blocks;

[0072] Step S22: Calculate the grayscale value of each pixel block. The grayscale value calculation formula of each pixel block is as follows:

[0073]

[0074] Where EH[m,n] is the grayscale value corresponding to the pixel block in the mth row and nth column of the headlight pattern image;

[0075] E[m,n] is the energy value corresponding to the pixel block at row m and column n in the headlight pattern image. The energy value represents the brightness value or relative brightness value.

[0076] E MAX is the maximum energy value corresponding to the pixel block in the headlight pattern image;

[0077] m is traversing M rows of pixel blocks;

[0078] n is traversing N columns of pixel blocks;

[0079] Step S23: Generate a grayscale value bit stream map according to the grayscale value of each pixel block, i.e., [EH[1,1], EH[2,1]...EH[M,N]], where the grayscale value bit stream map represents a data stream for continuous transmission or processing of grayscale value data of each pixel block.

[0080] Step S3: Transmit the headlight light pattern image data, which has undergone double-buffered pipeline scheduling and grayscale value bitmap stream calculation, to the driver module via LVDS data packet structured encapsulation. This LVDS data packet structured encapsulation involves pre-sorting the pixel blocks of the headlight light pattern image according to the ASIC pixel mapping table. Based on the headlight light pattern image data, which has undergone double-buffered pipeline scheduling and grayscale value bitmap stream calculation, a light drive signal is generated. This converts the grayscale value bitstream map into a drive current for the multi-function headlamp module.

[0081] Specifically, the calculation formula for the driving current of the multi-function headlamp module is as follows:

[0082]

[0083] Among them, I drive[m,n] is the driving current of the multifunctional headlamp module;

[0084] EH[m,n] is the gray value corresponding to the pixel block of the mth row and the nth column in the vehicle light pattern image;

[0085] I max is the maximum driving current of the driving module;

[0086] m is the traversal of M rows of pixel blocks;

[0087] n is the traversal of N columns of pixel blocks.

[0088] Step S4, the multifunctional headlamp module performs light irradiation according to the light driving signal. The multifunctional headlamp module can independently control the pixels, realizing the functions of low beam, high beam, ADB anti-dazzling, AFS curve illumination compensation and road icon projection.

[0089] The working principle of the present application is as follows:

[0090] The vehicle light pattern image data is preloaded and decoded; according to the decoded vehicle light pattern image data, double-buffered pipeline scheduling and gray value bitmap stream calculation are performed; according to the vehicle light pattern image data after double-buffered pipeline scheduling and gray value bitmap stream calculation, a light driving signal is generated; the multifunctional headlamp module performs light irradiation according to the light driving signal.

[0091] The headlamp module of the present application includes an HD module and a low beam module, and the HD module and the low beam module are independent of each other in the light path, but share the same outer lens, improving the integration level of the headlamp module, enabling multiple optical functions to be integrated in one headlamp module, reducing production costs, enhancing the structural compactness and modeling consistency of the headlamp module, and making the headlamp module more simple and stylish in modeling. The precise pixel control of the Micro LED light source enables the headlamp module to have low beam function, high beam function, ADB function, AFS function and projection function, increasing the safety and interactivity of driving.

[0092] The above specific embodiments further illustrate the technical problems solved by the present application, technical solutions and beneficial effects. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An integrated multifunctional headlamp module, characterized in that: It includes a Micro LED light source (1), a first lens (2), a second lens (3), a third lens (4), a fourth lens (5), an LED light source (6), a reflective bowl (7), a low-beam cutoff baffle (8) and a fifth lens (9), wherein the fourth lens (5) includes a fourth lens HD area (51) and a fourth lens low-beam area (52); The Micro LED light source (1), the first lens (2), the second lens (3), the third lens (4) and the fourth lens HD region (51) are sequentially arranged along the optical axis (a) from the object side to the image side. The Micro LED light source (1), the first lens (2), the second lens (3), the third lens (4) and the fourth lens HD region (51) constitute an HD module. The first lens (2), the second lens (3) and the fourth lens HD region (51) all have positive optical power, and the third lens (4) has negative optical power. The LED light source (6) is located at the focal position of the reflective bowl (7), and the low-beam cutoff baffle (8) is located at the focal position of the combination of the fifth lens (9) and the low-beam area (52) of the fourth lens. The LED light source (6), the reflective bowl (7), the low-beam cutoff baffle (8), the fifth lens (9) and the low-beam area (52) of the fourth lens constitute a low-beam module. When the LED light source (6) is turned on, light is directed toward the reflective bowl (7), and the light is collected by the reflective bowl (7) and then projected onto the low-beam cutoff baffle (8). After being blocked by the low-beam cutoff baffle (8), the remaining light is refracted through the fifth lens (9) and the low-beam area (52) of the fourth lens in sequence to form a low-beam light pattern.

2. The integrated multifunctional headlamp module according to claim 1, characterized in that: The object side surface and image side surface of the first lens (2) are S1 surface and S2 surface respectively, the object side surface and image side surface of the second lens (3) are S3 surface and S4 surface respectively, the object side surface and image side surface of the third lens (4) are S5 surface and S6 surface respectively, the object side surface and image side surface of the HD region (51) of the fourth lens are S7 surface and S8 surface respectively, the object side surface and image side surface of the low beam region (52) of the fourth lens are S9 surface and S10 surface respectively, and the object side surface and image side surface of the fifth lens (9) are S11 surface and S12 surface respectively.

3. The integrated multifunctional headlamp module according to claim 2, characterized in that: The S1 surface is a concave surface, the S2 surface is a convex surface, the S3 surface and the S4 surface are both convex surfaces, the S5 surface is a concave surface, the S6 surface is a convex surface, the S7 surface is a convex surface, the S8 surface is a plane, the S9 surface is a convex surface, and the S10 surface is a plane.

4. An integrated multifunctional headlamp system, characterized in that: It includes a storage module, a control module, a communication module, a drive module and a multifunctional headlamp module as claimed in any one of claims 1 to 3; The storage module is used to store vehicle light pattern image data; The control module is used to read the vehicle light pattern image data in the storage module, process the vehicle light pattern image data, and then send a light control command to the communication module; The communication module is used to receive the lighting control command and transmit it to the driving module; The driving module is used to drive the multifunctional headlamp module to illuminate the vehicle light pattern according to the light control command; The multifunctional headlamp module is used for performing low beam type illumination and high definition light type illumination.

5. The integrated multifunctional headlamp system according to claim 4, characterized in that: The HD light type includes an auxiliary low beam light type, a high beam light type, an ADB light type, an AFS light type and a projection light type.

6. A headlamp control method using the integrated multifunctional headlamp system according to any one of claims 4 to 5, characterized in that: It includes the following steps: Step S1, preloading and decoding vehicle light pattern image data; Step S2: performing double-buffer pipeline scheduling and grayscale value bitmap stream calculation based on the decoded vehicle light pattern image data; Step S3: generating a light driving signal based on the vehicle light pattern image data after double-buffered pipeline scheduling and grayscale value bitmap stream calculation; Step S4: The multifunctional headlamp module performs lighting according to the light driving signal.

7. The headlamp control method according to claim 6, characterized in that: The grayscale value bitmap stream calculation in step S2 specifically includes the following steps: Step S21, dividing the headlight pattern image into a plurality of pixel blocks; Step S22: Calculate the grayscale value of each pixel block; Step S23: Generate a grayscale value bit stream map according to the grayscale value of each pixel block.

8. The headlamp control method according to claim 7, characterized in that: The calculation formula of the grayscale value of each pixel block is as follows: Where EH[m,n] is the grayscale value corresponding to the pixel block in the mth row and nth column of the headlight pattern image; E[m,n] is the energy value corresponding to the pixel block in the mth row and nth column of the headlight pattern image; E MAX is the maximum energy value corresponding to the pixel block in the headlight pattern image; m is the pixel block that traverses all rows; n is the pixel block that traverses all columns.

9. The headlamp control method according to claim 7, characterized in that: In step S3, generating a light driving signal based on the vehicle light pattern image data after double-buffered pipeline scheduling and grayscale value bitmap stream calculation includes the following steps: Convert the grayscale value bit stream image into the driving current of the multi-function headlamp module.

10. The headlamp control method according to claim 9, characterized in that: The calculation formula of the driving current of the multifunctional headlamp module is as follows: Among them, I drive [m,n] is the driving current of the multi-function headlamp module; EH[m,n] is the grayscale value corresponding to the pixel block in the mth row and nth column of the headlight pattern image; I max is the maximum driving current; m is the pixel block that traverses all rows; n is the pixel block that traverses all columns.

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