Projection vehicle lamp for information indication

Abstract

The invention discloses a projection vehicle lamp for information indication. The projection vehicle lamp comprises a light source, a dodging module, a projection sheet module and a lens module, the light source, the dodging module and the lens module are detachably connected in sequence, and the center line of the light source, the center line of the dodging module and the center line of the lens module are all arranged on the same optical axis; the screen sheet module comprises a movable screen sheet; the screen sheet is eccentrically placed on the lens module relative to an optical axis, and the pattern center of the screen sheet is arranged on the optical axis. All the components are modularized and can be assembled into a whole, the structure is simple, the size is small, the cost is low, no heat sensitive device exists, so that high temperature resistance is achieved, all metal materials except optical devices are adopted, the structural strength is high, heat dissipation is convenient, and application to automobile lamp scenes is convenient.

Description

Technical Field

[0001] The present invention relates to the field of automotive lamps, and particularly to a projection headlamp for information indication. Background Art

[0002] In recent years, with the development of automotive technology, the personalized editing of headlamps has also become a major development direction. Among them, headlamps with projection functions can expand the functions of headlamps and have both aesthetic and practical values, and are increasingly used in automotive products.

[0003] Currently, the main projection headlamps can be divided into two types: static and dynamic. Static projection headlamps mainly use projection films (also called film sheets) to achieve projection images; dynamic projection headlamps require the use of DLP technology, laser scanning technology, or MEMS galvanometer technology. However, whether it is static or dynamic type, since they require multiple components, such as projection films, motors, guide rails, and reflectors, etc., to achieve image switching and uniformity. Such a complex structural design not only increases the weight of the headlamp, but also results in its too large volume and high heat dissipation difficulty, thus affecting the actual use experience.

[0004] Therefore, a new projection headlamp for information indication needs to be proposed to solve the existing problem of complex structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a projection headlamp for information indication to solve the problem of complex structure of the existing projection headlamps.

[0006] To achieve this purpose, the present invention adopts the following technical solutions: A projection headlamp for information indication, comprising a light source, a light homogenizing module, a projection film module, and a lens module; the light source, the light homogenizing module, and the lens module are sequentially detachably connected, and the center lines of the light source, the light homogenizing module, and the lens module are all arranged on the same optical axis; the projection film module includes a movable projection film; the projection film is eccentrically placed relative to the optical axis in the lens module, and the pattern center of the projection film is arranged on the optical axis.

[0007] Further, the projection film is rotatable.

[0008] Further, the projection film includes an annular film with a circular outer circumference.

[0009] Further, the projection film module further includes a driving member and a transmission member; the driving member is drivingly connected to the transmission member; the transmission member is drivingly connected to the projection film; a through hole is provided at the central position of the projection film.

[0010] Further, the transmission member includes a gear transmission structure, a rotating shaft, a bearing and a snap ring; the driving member is drivingly connected to the gear transmission structure; one end of the rotating shaft passes through one of the bearings and is drivingly connected to the gear transmission structure, and the other end sequentially passes through the center of one of the bearings and the through hole of the slide; the slide, the rotating shaft and the bearing are tightly fitted and connected by the snap ring.

[0011] Further, the slide module further includes a slide holder; the slide, the rotating shaft, the bearing and the snap ring are fixed on the slide holder.

[0012] Further, the projection headlight for information indication further includes soft silicone; the slide module and the lens module are connected and provided with soft silicone for dust prevention.

[0013] Further, the projection headlight for information indication further includes a magnet; the magnet is fixedly arranged at one end of the rotating shaft away from the gear transmission structure; the magnetic pole distribution of the magnet corresponds to the rotation angle.

[0014] Further, the projection headlight for information indication further includes a TMR angle sensor module; the TMR angle sensor module includes a TMR chip and a circuit board; the TMR chip is soldered on the circuit board; the circuit board is snap-connected to one end of the slide holder away from the motor.

[0015] Further, the distance between the TMR angle sensor module and the magnet is 0.5 mm to 2 mm.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Small volume, low cost, no thermal sensitive components, thus high temperature resistant, all-metal material with high structural strength and convenient heat dissipation, which is convenient for application in the automotive headlight scenario.

[0017] 2. Simple structure, can realize seamless switching of multiple pictures, and can realize simple dynamic picture effects by using the visual persistence effect.

[0018] 3. Using a slide instead of other optical display devices, with high light output efficiency. The eccentric design of the slide relative to the optical axis can maximize the use of the light source and is also convenient for the design of the projection lens to ensure the light output efficiency.

[0019] 4. High resolution, no pixel limitation, no grid-like patterns will appear. There is no dispensing throughout, no risk of colloid aging, and it meets the environmental protection requirements. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present invention.

[0022] Figure 1 It is a schematic structural diagram of an embodiment of a projection headlight for information indication according to the present invention; Figure 2 It is an exploded view of the structure of an embodiment of a projection headlight for information indication according to the present invention; Figure 3 It is an exploded view of the structure of a slide film module of an embodiment of a projection headlight for information indication according to the present invention; Figure 4 It is an exploded view of the structure of a slide film module of an embodiment of a projection headlight for information indication according to the present invention; Figure 5 It is a schematic diagram of the pattern of a slide film of an embodiment of a projection headlight for information indication according to the present invention; Figure 6 It is a schematic diagram of the pattern of a slide film of an embodiment of a projection headlight for information indication according to the present invention.

[0023] Marking description: 100, light source; 200, light homogenizing module; 300, slide film module; 400, lens module; 310, slide film bracket; 320, driving member; 330, gear transmission structure; 340, rotating shaft; 350, bearing; 360, snap ring; 370, slide film; 380, magnet; 390, TMR angle sensor module. Detailed implementation manners

[0024] To make the object, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the following described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 should not be construed as a limitation to the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be an intermediate component present at the same time.

[0026] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments.

[0027] Figure 1 Schematic structural diagram of an embodiment of a projection headlight for information indication according to the present invention; Figure 2 Exploded view of the structure of an embodiment of a projection headlight for information indication according to the present invention; Figure 3 Exploded view of the structure of a slide film module of an embodiment of a projection headlight for information indication according to the present invention; Figure 4 Exploded view of the structure of a slide film module of an embodiment of a projection headlight for information indication according to the present invention; Figure 5 Schematic diagram of the pattern of a slide film of an embodiment of a projection headlight for information indication according to the present invention; Figure 6 Schematic diagram of the pattern of a slide film of an embodiment of a projection headlight for information indication according to the present invention.

[0028] Embodiment 1: The embodiment of the present invention provides a projection headlight for information indication, which can solve the problems of large volume, complex structure, and high heat dissipation difficulty of traditional projection headlights.

[0029] As Figure 1 and Figure 2As shown, a projection vehicle lamp for information indication comprises a light source 100, a light homogenizing module 200, a projection film module 300 and a lens module 400; the light source 100, the light homogenizing module 200 and the lens module 400 are detachably connected in sequence, and the center line of the light source 100, the center line of the light homogenizing module 200 and the center line of the lens module 400 are all arranged on the same optical axis; the projection film module 300 comprises a movable projection film 370; the projection film 370 is eccentrically placed on the lens module 400 relative to the optical axis, and the pattern center of the projection film 370 is arranged on the optical axis (dashed line in the figure).

[0030] It should be noted that, as a more preferred embodiment, the light source 100 adopts a high-brightness array LED lamp (automotive grade), the LED lamp beads are welded on a copper substrate, a fin-type heat sink is integrated on the back of the substrate, the light source housing is made of aluminum alloy, and is fixed to the uniform light module 200 through a detachable connection, and a light hole is reserved in the direction of the optical axis.

[0031] Furthermore, the light homogenizing module 200 includes an aluminum cylinder, a light homogenizer (microlens array) and a collimating lens group (aspherical lens), the light homogenizer and the collimating lens group are coaxially packaged in the aluminum cylinder, one end of the aluminum cylinder provided with the light homogenizer is snap-connected to the light source 100 (LED lamp), and the other end is snap-connected to the lens module 400. It should be noted that the light homogenizer converts the LED lamp from divergent light to a uniform surface light source, and the collimating lens group further shapes it into a parallel light beam, and the spot diameter matches the size of the slide module 300.

[0032] Furthermore, the slide film 370 is rotatable; the slide film 370 is an annular film made of glass and having a circular outer circumference.

[0033] Furthermore, the slide module 300 further includes a driving member 320 and a transmission member; the driving member 320 is transmission-connected to the transmission member; the transmission member is transmission-connected to the slide 370; and a through hole is provided at the center of the slide 370.

[0034] Further, the transmission member includes a gear transmission structure 330, a rotating shaft 340, a bearing 350, and a circlip 360; the driving member 320 is drivingly connected to the gear transmission structure 330; one end of the rotating shaft 340 passes through one of the bearings 350 and is drivingly connected to the gear transmission structure 330, and the other end sequentially passes through the center of one of the bearings 350 and the through hole of the slide 370; the slide 370, the rotating shaft 340, and the bearing 350 are tightly connected by the circlip 360. Further, the slide module 300 further includes a slide holder 310; the slide 370, the rotating shaft 340, the bearing 350, and the circlip 360 are fixed on the slide holder 310.

[0035] Preferably, the driving member 320 is a reduction motor.

[0036] Preferably, the output shaft of the driving member 320 is drivingly connected to the input shaft of the gear transmission structure 330 through a coupling (not shown in the figure). As a preferred embodiment, the gear transmission structure 330 includes a transmission shaft, a gear, and a flat key. At this time, the input shaft of the gear transmission structure 330 is the transmission shaft, the output shaft of the driving member 320 is drivingly connected to the transmission shaft of the gear transmission structure 330 through a coupling, and the transmission shaft is drivingly connected to the gear through a flat key.

[0037] It should be noted that the slide 370, the rotating shaft 340, and the bearing 350 are tightly fitted (in accordance with vehicle regulations) by the circlip 360 and fixed on the slide holder 310 with screws and elastic pieces. The driving member 320 rotates, thereby driving the rotating shaft 340 to rotate on the bearing 350, and the slide 370 rotates accordingly.

[0038] Further, the rotating shaft 340 is an integrally cast gear shaft; the gear shaft is meshingly connected to the output gear of the gear transmission structure 330.

[0039] Further, the number of the bearings 350 is a pair; a pair of the bearings 350 are oppositely arranged on the slide holder 310; both ends of the rotating shaft 340 respectively pass through a pair of the bearings 350.

[0040] It should be noted that the slide holder 310 is fixed to the front end of the lens module 400 through an eccentric adapter ring (not shown in the figure), and the offset distance between the central axis of the adapter ring and the optical axis ( = 1 / 2 of the radius of the slide 370), so that the edge of the slide 370 deviates from the optical axis, but the center of the pattern still coincides with the optical axis.

[0041] Furthermore, the slide film 370 is also provided with a hollow pattern formed by electroplating and exposure and development processes.

[0042] As a preferred embodiment, the lens module 400 includes a projection lens group, which is composed of multiple glass lenses. The front end of the lens module 400 is designed with an eccentric slot, which is plugged into the adapter ring of the projection film module 300, and the rear end is fixed to the car light housing through threads.

[0043] This embodiment achieves automotive-grade standards in terms of light efficiency, stability, imaging quality and environmental adaptability through optical-mechanical-electrical integration, and has dynamic interaction capabilities, providing an innovative information indication solution for intelligent automotive lighting. It is also small in size, low in cost, has no heat-sensitive devices and is therefore resistant to high temperatures, and has a high strength and heat dissipation due to its all-metal material structure, which facilitates its application in automotive lighting scenes; it has a simple structure, can achieve seamless switching of multiple images, and can achieve simple dynamic image effects by using the visual persistence effect; it uses a projection film 370 instead of other optical display devices, and has high light output efficiency; the eccentric design of the projection film 370 relative to the optical axis can maximize the use of the light source 100, and is also convenient for the design of the projection lens to ensure light output efficiency; it has high resolution, no pixel restrictions, and will not have a grid-like pattern; it has no glue dispensing throughout the body, and has no risk of colloid aging, which meets environmental protection requirements; the design of the LED lamp being independent of the entire optical path makes it easier to replace the light source 100, and the entire projection lamp can be updated by simply replacing LED lamps of different brightness and colors.

[0044] Embodiment 2: like Figure 1 and Figure 2 As shown, a projection vehicle lamp for information indication comprises a light source 100, a light homogenizing module 200, a projection film module 300 and a lens module 400; the light source 100, the light homogenizing module 200 and the lens module 400 are snap-connected in sequence, and their center lines are all arranged on the same optical axis; the projection film module 300 is eccentrically placed on the lens module 400 relative to the optical axis, and the pattern center of the projection film module 300 is arranged on the optical axis.

[0045] Furthermore, the slide module 300 is composed of a slide bracket 310, a driving member 320, a gear transmission structure 330, a rotating shaft 340, a bearing 350, a retaining spring 360 and a slide 370; the driving member 320 is transmission-connected to the gear transmission structure 330; the output member of the gear transmission structure 330 is transmission-connected to the rotating shaft 340; the slide 370, the rotating shaft 340 and the bearing 350 are tightly fitted through the retaining spring 360 and fixed to the slide bracket 310.

[0046] Further, combined with Figure 3 andFigure 4 The projection headlamp for information indication further includes a magnet 380; the magnet 380 is fixedly arranged at one end of the rotating shaft 340 away from the gear transmission structure 330; the magnetic pole distribution of the magnet 380 corresponds to the rotation angle.

[0047] Furthermore, the projection headlamp for information indication further includes a TMR angle sensor module 390; the TMR angle sensor module 390 includes a TMR chip and a circuit board; the TMR chip is soldered to the circuit board; the circuit board is snap-connected to one end of the slide film holder 310 away from the driving member 320.

[0048] It should be noted that the light emitted by the LED lamp is homogenized and shaped by the homogenizing module 200 to form a uniform light spot projected on the slide film 370. Corresponding to different patterns of the slide film 370, different pictures can be projected. The driving member 320 drives the slide film 370 to rotate at different angular frequencies, and the light passes through the slide film 370 and then exits from the lens module 400, so that dynamic (utilizing the visual persistence effect) or static pictures with different effects can be projected, realizing information indication and viewing effects. The magnet 380 and the TMR angle sensor module 390 are provided to be used for sensing the angular position of the slide film 370 in real time, so as to realize the rapid switching of patterns.

[0049] It should be noted that the logic of angle detection is that the magnet 380 rotates with the rotating shaft 340 to generate a periodic magnetic field, the TMR sensor outputs two orthogonal sine signals, and the main control chip calculates the absolute angle through the arctangent. and compares it with the preset angle (corresponding to different patterns), and then the PID controller dynamically adjusts the PWM duty ratio of the driving member 320 until it is in error ±0.3° (meeting the projection alignment requirement).

[0050] Furthermore, the slide film module 300 and the lens module 400 are connected and provided with soft silicone (not marked in the figure) for dust prevention.

[0051] Preferably, the hollowed-out pattern formed on the slide film 370 after the electroplating and exposure development processes has high precision, can be adjusted according to requirements, and the minimum line can reach 2 - 3 microns.

[0052] Preferably, the bearing 350 of the slide film module 300 is fixed on the slide film holder 310.

[0053] Preferably, the slide film 370 is arranged in the optical path in a "plug-in" manner.

[0054] Preferably, all structural components of the projection headlamp are made of metal, and all lenses are glass lenses.

[0055] Preferably, the projection film 370 of the projection headlamp is replaceable.

[0056] Preferably, the LED lamp of the projection headlamp is replaceable.

[0057] Preferably, the driving member 320 of the projection film module 300 is a reduction motor.

[0058] Furthermore, the TMR chip and the magnet 380 of the projection film module 300 are placed concentrically, and their axes are on the rotation axis of the projection film module 300. The magnet 380 is stationary relative to the projection film 370. When the projection film 370 rotates, the magnet 380 rotates accordingly, and the direction of the magnetic field around the magnet 380 changes. This signal is captured by the TMR chip and fed back to the control system, enabling real-time monitoring of the angular position of the projection film 370. The control system then controls the reduction driving member 320 to rotate the projection film 370 by a specified angle or at a certain speed, thereby projecting static or dynamic patterns, such as Figure 5 shows the static pattern of the projection film 370, Figure 6 shows the meteor shower-like dynamic pattern of the projection film 370.

[0059] Furthermore, the projection film 370 is made of high-temperature resistant glass (softening point > 800 °C) and is coated with an anti-reflection film on the surface (to reduce light loss).

[0060] Furthermore, all metal structural components pass the salt spray test (96 h), and the edges of the lenses are coated with a mold-proof coating.

[0061] Furthermore, the rotating shaft 340 and the bearing 350 are in interference fit (clearance < 5 ) to avoid angle drift caused by vibration.

[0062] Furthermore, thermal conductive silicone grease is filled between the LED copper substrate and the radiator, and the radiator is externally connected to an air duct (actively dissipating heat using the vehicle's airflow).

[0063] It should also be added that at a projection distance of 5 m, the edge blur of the pattern projected by the projection film 370 is < 2 mm (the traditional mechanical projection film solution > 5 mm); it is required to support OTA (Over-The-Air) upgrade of the preset angle-pattern mapping table, and users can customize the projection content; the service life of the driving member 320 and the bearing 350 > 100,000 switching cycles (meeting the 10-year service life requirement of vehicle regulations).

[0064] Working process: After the vehicle lamp is powered on, the main control chip (MCU) installed in the vehicle drives the driving member 320 to rotate one week. The TMR sensor records the angle-magnetic field relationship to complete self-calibration. The calibration data is stored in the storage module within the main control chip (a technology known to professionals in this industry, not elaborated here too much), compensating for assembly errors (such as the installation deviation of the magnet 380 ). Then when in the static mode, the MCU controls the driving member 320 to rotate the projection film 370 to the target angle and lock it (such as projecting the LOGO); if it is dynamic, the MCU drives the driving member 320 to rotate at a preset angular frequency to generate a dynamic light effect by using the persistence of vision effect (such as realizing a 3Hz rotating light pattern). And if an emergency signal (such as a collision warning) is received, the MCU interrupts the current task and controls the driving member 320 to switch to the warning pattern angle at the maximum torque (such as ), and the response time is < 100ms.

[0065] Through the magnetoelectric sensing closed-loop control, dynamic light effect algorithm and vehicle-grade modular design in this embodiment, the high-precision, high-reliability and intelligent upgrade of the projection vehicle lamp are realized, and precise closed-loop control can be achieved (angle error ±0.3°); the diversity of dynamic light effects (seamless switching between static / dynamic modes); the adaptability to the full environment (dust-proof, weather-resistant, earthquake-resistant); user customization (flexible replacement of patterns and light sources), only need to replace the customized projection film 370. It provides a solution with both functionality and ornamental value for intelligent vehicle lighting and can be deeply integrated into the future vehicle-mounted information interaction system.

[0066] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A projection lamp for information indication, characterized in that: It includes a light source, a uniform light module, a slide module and a lens module; The light source, the light homogenizing module and the lens module are detachably connected in sequence, and the center line of the light source, the center line of the light homogenizing module and the center line of the lens module are all arranged on the same optical axis; The slide module includes a movable slide; The slide film is eccentrically placed on the lens module relative to the optical axis, and the pattern center of the slide film is arranged on the optical axis.

2. The projection lamp for information indication according to claim 1, characterized in that: The slide sheet is rotatable.

3. The projection lamp for information indication according to claim 2, characterized in that: The slide film comprises a ring film with a circular outer circumference.

4. The projection lamp for information indication according to claim 2, characterized in that: The slide module also includes a driving member and a transmission member; The driving member is transmission-connected to the transmission member; The transmission member is transmission-connected to the slide; A through hole is arranged at the center of the slide.

5. The projection lamp for information indication according to claim 4, characterized in that: The transmission member includes a gear transmission structure, a rotating shaft, a bearing and a retaining spring; The driving member is transmission-connected to the gear transmission structure; One end of the rotating shaft passes through one of the bearings and is in transmission connection with the gear transmission structure, and the other end passes through the center of one of the bearings and the through hole of the slide in sequence; The slide, the rotating shaft and the bearing are tightly connected via the retaining spring.

6. The projection lamp for information indication according to claim 5, characterized in that: The slide module also includes a slide bracket; The slide, the rotating shaft, the bearing and the clamping spring are fixed on the slide bracket.

7. The projection lamp for information indication according to claim 1, characterized in that: The projection lamp for information indication also includes soft silica gel; The slide module and the lens module are connected to each other and provided with soft silica gel for preventing dust.

8. The projection lamp for information indication according to claim 5, characterized in that: The projection lamp for information indication further comprises a magnet; The magnet is fixedly disposed at one end of the rotating shaft away from the gear transmission structure; The magnetic pole distribution of the magnet corresponds to the rotation angle.

9. The projection lamp for information indication according to claim 8, characterized in that: The projection lamp for information indication also includes a TMR angle sensor module; The TMR angle sensor module includes a TMR chip and a circuit board; The TMR chip is soldered on the circuit board; The circuit board buckle is connected to an end of the slide support away from the motor.

10. The projection lamp for information indication according to claim 9, characterized in that: The distance between the TMR angle sensor module and the magnet is 0.5 mm to 2 mm.

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