Projection vehicle lamp for information indication

Abstract

The utility model 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 utility model relates to the field of automobile lamps, especially to a projection car lamp for information indication. BACKGROUND

[0002] In recent years, with the development of automobile technology, the personalized editing of car lamps has also become a major development direction. Among them, the car lamp with projection function can expand the function of car lamp, has aesthetic and practical value, and is more and more used in automobile products.

[0003] At present, the main projection car lamp can be divided into static and dynamic two kinds. The static projection car lamp mainly uses projection film (also called film) to realize the projection image; the dynamic projection car lamp needs to use DLP technology, laser scanning technology or MEMS mirror technology. However, whether it is static or dynamic type, since they need multiple components, such as projection film, motor, guide rail and reflector, etc., to realize the switching and uniformity of image. Such complex structure design not only increases the weight of car lamp, but also leads to its large size and high difficulty in heat dissipation, thereby affecting the actual use experience.

[0004] Therefore, a new projection car lamp for information indication is needed to solve the existing problem of complex structure. SUMMARY

[0005] The utility model aims at providing a projection car lamp for information indication, which solves the problem of complex structure of the existing projection car lamp.

[0006] To achieve this purpose, the utility model adopts the following technical scheme:

[0007] A projection car lamp for information indication, comprising a light source, a light uniformity module, a projection film module and a lens module; the light source, the light uniformity module and the lens module are sequentially detachably connected, the center line of the light source, the center line of the light uniformity module and the center line of the lens module are all arranged on the same optical axis; the projection film module comprises a movable projection film; the projection film is eccentrically placed in the lens module relative to the optical axis, and the pattern center of the projection film is arranged on the optical axis.

[0008] Further, the projection film can rotate.

[0009] Further, the projection film comprises a ring piece with a circular outer periphery.

[0010] Further, the projection film module further comprises a driving member and a transmission member; the driving member is transmissionally connected to the transmission member; the transmission member is transmissionally connected to the projection film; and a through hole is arranged at the center position of the projection film.

[0011] Further, the transmission member comprises a gear transmission structure, a rotating shaft, a bearing and a snap spring; the driving member is in transmission connection with the gear transmission structure; one end of the rotating shaft is in transmission connection with the gear transmission structure through one of the bearings, and the other end is in tight connection with the through hole of the projection sheet through the center of the other bearing; the projection sheet, the rotating shaft and the bearing are in tight connection through the snap spring.

[0012] Further, the projection sheet module further comprises a projection sheet support; the projection sheet, the rotating shaft, the bearing and the snap spring are fixed on the projection sheet support.

[0013] Further, the projection car lamp for information indication further comprises soft silica gel; the projection sheet module and the lens module are connected with the soft silica gel for dust prevention.

[0014] Further, the projection car lamp for information indication further comprises a magnet; the magnet is fixed on the end of the rotating shaft away from the gear transmission structure; the magnetic pole distribution of the magnet corresponds to the rotation angle.

[0015] Further, the projection car lamp for information indication further comprises a TMR angle sensor module; the TMR angle sensor module comprises a TMR chip and a circuit board; the TMR chip is soldered on the circuit board; the circuit board is buckled on the end of the projection sheet support away from the driving member.

[0016] Further, the distance between the TMR angle sensor module and the magnet is 0.5mm-2mm.

[0017] Compared with the prior art, the projection car lamp for information indication has the following beneficial effects:

[0018] 1. Small volume, low cost, no heat-sensitive device, high temperature resistance, all-metal material, high structural strength and easy heat dissipation, thus facilitating the application in the automobile lamp scene.

[0019] 2. Simple structure, can realize multi-picture non-inductive switching, and can realize simple dynamic picture effect by using the visual persistence effect.

[0020] 3. The projection sheet is used instead of other optical display devices, and the light output efficiency is high. The eccentric design of the projection sheet relative to the optical axis can maximize the use of the light source, and is convenient for the design of the projection lens, thereby ensuring the light output efficiency.

[0021] 4. High resolution, no pixel limitation, no grid-like pattern, no point glue, no aging risk, and meets the environmental protection requirements. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained on the basis of these drawings without any creative labor.

[0023] The structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes of the present application, should still fall within the scope of the technical content disclosed by the present application.

[0024] Figure 1 Structure diagram of an embodiment of the projection car lamp for information indication of the present application;

[0025] Figure 2 Structure explosion diagram of an embodiment of the projection car lamp for information indication of the present application;

[0026] Figure 3 Structure explosion diagram of the projection film module of an embodiment of the projection car lamp for information indication of the present application;

[0027] Figure 4 Structure explosion diagram of the projection film module of an embodiment of the projection car lamp for information indication of the present application;

[0028] Figure 5 Pattern diagram of the projection film of an embodiment of the projection car lamp for information indication of the present application;

[0029] Figure 6 Pattern diagram of the projection film of an embodiment of the projection car lamp for information indication of the present application.

[0030] Illustration: 100, light source; 200, light uniformization module; 300, projection film module; 400, lens module; 310, projection film support; 320, driving part; 330, gear transmission structure; 340, rotating shaft; 350, bearing; 360, clasp spring; 370, projection film; 380, magnet; 390, TMR angle sensor module. DETAILED DESCRIPTION

[0031] In order to make the utility model of the utility model purpose, characteristics, advantages can be more obvious and easy to understand, the following will be combined with the utility model embodiment in the drawings, the technical scheme in the utility model embodiment is clearly and completely described, obviously, the following described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor are within the scope of the utility model protection.

[0032] In the description of the utility model, it is understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0033] The technical scheme of the utility model will be further illustrated below by specific embodiments in conjunction with the drawings.

[0034] Figure 1 The structure diagram of an embodiment of the projection car lamp for information indication of the utility model; Figure 2 The structure explosion drawing of an embodiment of the projection car lamp for information indication of the utility model; Figure 3 The structure explosion drawing of the projection film module of an embodiment of the projection car lamp for information indication of the utility model; Figure 4 The structure explosion drawing of the projection film module of an embodiment of the projection car lamp for information indication of the utility model; Figure 5 The pattern schematic view of the projection film of an embodiment of the projection car lamp for information indication of the utility model; Figure 6 The pattern schematic view of the projection film of an embodiment of the projection car lamp for information indication of the utility model.

[0035] Embodiment one:

[0036] The utility model embodiment provides a projection car lamp for information indication, and can solve the problems of large volume, complex structure and high heat dissipation difficulty of the traditional projection car lamp.

[0037] As Figure 1 And Figure 2As shown, a projection car lamp for information indication, light source 100, light uniformity module 200, projection film module 300 and lens module 400; the light source 100, the light uniformity module 200 and the lens module 400 are sequentially detachable connected, the center line of the light source 100, the center line of the light uniformity module 200 and the center line of the lens module 400 are all arranged on the same optical axis; the projection film module 300 includes a movable projection film 370; the projection film 370 is placed on the lens module 400 eccentric to the optical axis, and the pattern center of the projection film 370 is arranged on the optical axis (dashed line in the figure).

[0038] It should be noted that, as a more preferred embodiment, the light source 100 uses high-brightness array LED lamp (vehicle level), LED lamp bead is welded on copper substrate, substrate back integrates fin type radiator, light source shell is aluminum alloy material, through detachable connection and light uniformity module 200 fixed, optical axis direction reserved light hole.

[0039] Further, the light uniformity module 200 includes an aluminum cylinder, a light uniformity device (microlens array) and a collimating lens group (aspherical lens), the light uniformity device and the collimating lens group are coaxially encapsulated in the aluminum cylinder, one end of the aluminum cylinder provided with the light uniformity device is buckled connected to the light source 100 (LED lamp), and the other end is buckled connected to the lens module 400. It should be noted that the light uniformity device converts the LED lamp from divergent light to uniform area light source, and the collimating lens group further shapes into parallel light beam, and the spot diameter matches the size of the projection film module 300.

[0040] Further, the projection film 370 can rotate; the projection film 370 is made of glass and has a circular annular shape.

[0041] Further, the projection film module 300 further includes a driving member 320 and a transmission member; the driving member 320 is transmissionally connected to the transmission member; the transmission member is transmissionally connected to the projection film 370; the projection film 370 has a through hole at the center position.

[0042] Further, the transmission member comprises a gear transmission structure 330, a rotating shaft 340, a bearing 350 and a circlip 360; the driving member 320 is in transmission connection with the gear transmission structure 330; one end of the rotating shaft 340 passes through one of the bearings 350 and is in transmission connection with the gear transmission structure 330, and the other end passes through the center of the other bearing 350 and the through hole of the projection sheet 370 in sequence; the projection sheet 370, the rotating shaft 340, the bearing 350 and the circlip 360 are in tight fit connection.

[0043] Preferably, the driving member 320 is a speed reducer motor.

[0044] Preferably, the output shaft of the driving member 320 is in transmission connection with the input shaft of the gear transmission structure 330 through a shaft coupling (not shown in the figure); as a preferred embodiment, the gear transmission structure 330 comprises 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 in transmission connection with the transmission shaft of the gear transmission structure 330 through the shaft coupling, and the transmission shaft is in transmission connection with the gear through the flat key.

[0045] It should be noted that the projection sheet 370, the rotating shaft 340 and the bearing 350 are in mechanical tight fit (vehicle standard requirement) with the circlip 360, and are fixed on the projection sheet support 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 projection sheet 370 rotates accordingly.

[0046] Further, the rotating shaft 340 is an integrally cast gear shaft; the gear shaft is in meshing connection with the output gear of the gear transmission structure 330.

[0047] Further, the number of the bearings 350 is one pair; the pair of bearings 350 are oppositely arranged on the projection sheet support 310; the two shaft ends of the rotating shaft 340 pass through the pair of bearings 350 respectively.

[0048] It should be noted that the projection sheet support 310 is fixed on the front end of the lens module 400 through an eccentric adapter ring (not shown in the figure), the center axis of the adapter ring is offset from the optical axis by a distance ( =1 / 2 of the radius of the projection sheet 370), so that the edge of the projection sheet 370 is offset from the optical axis, but the center of the pattern is still coincident with the optical axis.

[0049] Further, the projection sheet 370 is also provided with a hollowed pattern formed by electroplating and exposure and development process.

[0050] As a preferred embodiment, the lens module 400 includes a projection lens group composed of multiple glass lenses, and the front end of the lens module 400 is designed with an eccentric card slot which is inserted with the adapter ring of the projection sheet module 300, and the rear end is fixed with the car lamp shell through threads.

[0051] The embodiment achieves vehicle-level standards in light efficiency, stability, imaging quality, and environmental adaptability through optical-mechanical-electrical integration, and has dynamic interaction capability, providing an innovative information indication solution for intelligent car lighting. It also has small size, low cost, no heat-sensitive devices, high temperature resistance, high strength of all-metal material structure, and good heat dissipation, thus facilitating application in car lamp scenarios; simple structure, can realize multi-picture non-inductive switching, and can realize simple dynamic picture effect using visual persistence effect; high light efficiency using projection sheet 370 instead of other optical display devices; eccentric design of projection sheet 370 relative to the optical axis can maximize the use of light source 100, and is convenient for the design of projection lens, ensuring light efficiency; high resolution, no pixel limitation, no grid-like pattern; no glue, no risk of glue aging, meets environmental protection requirements; LED lamp is independent of the entire optical path design, making it more convenient to replace the light source 100, and replacing different brightness and color LED lamps can realize the update of the entire projection car lamp.

[0052] Embodiment two:

[0053] As shown in Figure 1 and Figure 2 , a projection car lamp for information indication, a light source 100, a light uniformization module 200, a projection sheet module 300, and a lens module 400; the light source 100, the light uniformization module 200, and the lens module 400 are sequentially buckled and connected, and their center lines are arranged on the same optical axis; the projection sheet module 300 is eccentrically placed on the lens module 400 relative to the optical axis, and the pattern center of the projection sheet module 300 is arranged on the optical axis.

[0054] Further, the projection sheet module 300 is composed of a projection sheet support 310, a driving part 320, a gear transmission structure 330, a rotating shaft 340, a bearing 350, a clasp spring 360, and a projection sheet 370; the driving part 320 is transmissionally connected to the gear transmission structure 330; the output part of the gear transmission structure 330 is transmissionally connected to the rotating shaft 340; the projection sheet 370, the rotating shaft 340, and the bearing 350 are tightly fitted through the clasp spring 360 and fixed on the projection sheet support 310.

[0055] Further, in combination withFigure 3 and Figure 4 The projection car lamp for information indication further comprises a magnet 380; the magnet 380 is fixedly arranged at one end of the rotating shaft 340 away from the gear transmission structure 330; and the magnetic pole distribution of the magnet 380 corresponds to the rotation angle.

[0056] Further, the projection car lamp for information indication further comprises a TMR angle sensor module 390; the TMR angle sensor module 390 comprises a TMR chip and a circuit board; the TMR chip is soldered on the circuit board; and the circuit board is buckled to one end of the projection film support 310 away from the driving member 320.

[0057] It should be noted that the light emitted by the LED lamp is uniformized and shaped after passing through the light uniformization module 200, and then forms a uniform light spot on the projection film 370. Different pictures can be projected corresponding to different projection film 370 patterns. The driving member 320 drives the projection film 370 to rotate at different angular frequencies, and the light passes through the projection film 370 and then exits from the lens module 400, so that dynamic (using the visual persistence effect) or static pictures with different effects can be projected, and information indication and viewing effect can be realized. The magnet 380 and the TMR angle sensor module 390 can be used to sense the angular position of the projection film 370 in real time, so as to realize rapid switching of patterns.

[0058] 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, and the TMR sensor outputs two orthogonal sine signals, and the master control chip calculates the absolute angle through the inverse tangent and compares it with the preset angle (corresponding to different patterns), and then the PID controller dynamically adjusts the PWM duty cycle of the driving member 320 until and the error ±0.3° (satisfying the projection alignment requirement).

[0059] Further, the projection film module 300 and the lens module 400 are connected and arranged with a soft silica gel (not marked in the figure) for dust prevention.

[0060] Preferably, the hollow pattern formed on the projection film 370 after electroplating and exposure development processes. The precision is relatively high, and can be adjusted according to requirements, and the minimum line can reach 2-3 microns.

[0061] Preferably, the bearing 350 of the projection film module 300 is fixed on the projection film support 310.

[0062] Preferably, the projection film 370 is arranged on the light path in a "plug-in" manner.

[0063] Preferably, all structural parts of the projection car lamp are made of metal, and all lenses are glass lenses.

[0064] Preferably, the projection lens 370 of the projection car lamp is replaceable.

[0065] Preferably, the LED lamp of the projection car lamp is replaceable.

[0066] Preferably, the driving part 320 of the projection lens module 300 is a reduction motor.

[0067] Further, the TMR chip and the magnet 380 of the projection lens module 300 are placed in a concentric manner, and the axis thereof is on the rotation axis of the projection lens module 300. The magnet 380 is static relative to the projection lens 370, and when the projection lens 370 rotates, the magnet 380 rotates with it, and the magnetic field direction around the magnet 380 changes. This signal is captured by the TMR chip and fed back to the control system, so that the real-time monitoring of the angle position of the projection lens 370 can be realized. The control system controls the reduction driving part 320 to make the projection lens 370 rotate through a specified angle or at a certain speed, so as to project a static or dynamic pattern, such as Figure 5 The static pattern of the projection lens 370 is shown, Figure 6 The meteor shower-like dynamic pattern of the projection lens 370 is shown.

[0068] Further, the projection lens 370 adopts high-temperature-resistant glass (softening point > 800°C), and the surface is coated with an anti-fouling film (reducing light loss).

[0069] Further, all metal structural parts pass the salt spray test (96h), and the lens edge is coated with an anti-fouling coating.

[0070] Further, the shaft 340 and the bearing 350 adopt an interference fit (clearance <5 to avoid angle drift caused by vibration.

[0071] Further, the LED copper substrate and the heat sink are filled with heat-conducting silicone grease, and the heat sink is externally connected to an air duct (utilizing the airflow of the vehicle to actively dissipate heat).

[0072] It should be further pointed out that, at a projection distance of 5m, the edge blur of the pattern projected by the projection lens 370 is <2mm (the traditional mechanical projection lens scheme is >5mm); OTA (Over-The-Air, Over-The-Air technology) upgrade of the preset angle-pattern mapping table is required to support, and users can customize the projection content; the service life of the driving part 320 and the bearing 350 is >100,000 switching cycles (satisfying the 10-year service life requirement of the vehicle).

[0073] Working process:

[0074] After the car light is powered on, the main control chip (MCU) arranged in the car drives the driving member 320 to rotate one circle, the TMR sensor records the angle-magnetic field relationship, self-calibration is completed, and the calibration data is stored in the storage module in the main control chip (which is a technology known to those skilled in the art, and will not be described here in detail) to compensate for assembly errors (such as installation deviation of the magnet 380 ). Then when it is in a static mode, the MCU controls the driving member 320 to rotate the projection sheet 370 to a target angle and lock (such as projecting a LOGO); if it is dynamic, the MCU drives the driving member 320 to rotate at a preset angular frequency , and uses the visual persistence effect to generate a dynamic light effect (such as realizing 3Hz rotating light lines). If an emergency signal (such as a collision warning) is received, the MCU interrupts the current task, controls the driving member 320 to switch to a warning pattern angle (such as ) with the maximum torque, and the response time is less than 100ms.

[0075] The embodiment realizes high precision, high reliability and intelligent upgrading of the projection car light through magneto-electric sensing closed-loop control, dynamic light effect algorithm and car-grade modular design, can accurately control in a closed loop (angle error ±0.3°); dynamic light effect diversity (static / dynamic mode seamless switching); full environmental adaptability (dustproof, weather-resistant, shock-resistant); user customization (pattern, light source flexible replacement), only the customized projection sheet 370 needs to be replaced. It provides a solution with functionality and ornamental value for intelligent car lighting, and can be deeply integrated into future vehicle information interaction systems.

[0076] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection car light for information indication, characterized in that, The projection car lamp comprises a light source, a light-uniformizing module, a projection film module and a lens module. The light source, the light-uniformizing module and the lens module are sequentially detachably connected, and the center lines of the light source, the light-uniformizing module and the lens module are arranged on the same optical axis. The projection film module comprises a movable projection film. The projection film is eccentrically arranged in the lens module relative to the optical axis, and the pattern center of the projection film is arranged on the optical axis.

2. The projection vehicle light for information indication according to claim 1, characterized in that, The projection film is rotatable.

3. The projection vehicle light for information indication according to claim 2, characterized in that, The projection film comprises a ring-shaped projection film.

4. The projection vehicle light for information indication according to claim 2, wherein, The projection film module further comprises a driving member and a transmission member. The driving member is in transmission connection with the transmission member. The transmission member is in transmission connection with the projection film. The projection film is provided with a through hole at the center position.

5. The projection vehicle light for information indication according to claim 4, characterized in that, The transmission member comprises a gear transmission structure, a rotating shaft, a bearing and a clasp spring. The driving member is in transmission connection with the gear transmission structure. One end of the rotating shaft is in transmission connection with the gear transmission structure through one of the bearings, and the other end is in transmission connection with the through hole of the projection film through the center of the other bearing. The projection film, the rotating shaft and the bearing are tightly connected through the clasp spring.

6. The projection vehicle light for information indication according to claim 5, characterized in that, The projection film module further comprises a projection film support. The projection film, the rotating shaft, the bearing and the clasp spring are fixed on the projection film support.

7. The projection vehicle light for information indication according to claim 1, wherein The projection car lamp for information indication further comprises soft silicone. The projection film module and the lens module are connected to be provided with soft silicone for dust prevention.

8. The projection vehicle light for information indication according to claim 5, wherein, The projection car lamp for information indication further comprises a magnet. The magnet is fixedly arranged at the 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 vehicle light for information indication according to claim 8, characterized in that, The projection car lamp for information indication further comprises a TMR angle sensor module. The TMR angle sensor module comprises a TMR chip and a circuit board. The TMR chip is soldered on the circuit board. The circuit board is buckle-connected to the end of the projection film support away from the driving member.

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

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