CN111077721B

CN111077721B - Vehicle lamp projection device and projection method thereof

Info

Publication number: CN111077721B
Application number: CN201811224209.0A
Authority: CN
Inventors: 荣文秀; 郎海涛; 张恩鑫; 袁迪; 顾菲
Original assignee: Ningbo Sunny Automotive Optech Co Ltd
Current assignee: Ningbo Sunny Automotive Optech Co Ltd
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2022-08-02
Anticipated expiration: 2038-10-19
Also published as: CN111077721A

Abstract

The invention discloses a vehicle lamp projection device and a projection method thereof, wherein the projection device comprises a light source and an MEMS scanning mirror, wherein the light source can generate a projection light beam, the MEMS scanning mirror is arranged at one side of the light source, and the MEMS scanning mirror can reflect the projection light beam according to a rotation rule and project a projection pattern in a projection area in a scanning mode.

Description

Vehicle lamp projection device and projection method thereof

Technical Field

The invention relates to the field of optics, in particular to a vehicle lamp projection device and a projection method thereof.

Background

In recent years, a technology of projecting by using a vehicle lamp is gradually appearing in the field of view of the public, and a humanized design is popular among consumers because the vehicle lamp can simply project while illuminating, for example, a warning pattern is projected to remind pedestrians of safety or to warn surrounding vehicles to avoid.

Comparatively common realization car Light projected technique is the LED (Emitting Diode, Light Emitting Diode is LED for short) car Light of matrix on the market now, the LED car Light of matrix includes a plurality of LED Light sources, every the LED Light source can be by independent control, and then can shine the place ahead road that the vehicle went on the road, say so, the sign projection that turns to the car when the car prepares the turn left or turn right arrives the place ahead road surface to remind the place ahead pedestrian to notice, or with the navigation route projection to the road surface of car, in order to make things convenient for the user to drive according to the navigation route that appears on the road surface when driving, avoid the user because look over the attention that the navigation dispersed the driving when driving, and then be favorable to ensureing user's driving safety.

However, the matrix type LED vehicle lamp has many problems in practical application. Firstly, a plurality of LED light sources of the LED car light of matrix closely arrange, the heat gathering that the LED light source produced in the course of the work for the temperature of the LED car light of matrix risees, and the light decay of LED light source is directly related to the temperature with its life-span, in case the heat dissipation is not good will directly influence the light effect that the LED light source produced, and then influence driving safety. Moreover, if the heat generated by the matrix type LED lamp is difficult to dissipate, the service life of the matrix type LED lamp is affected, and the aging of other parts is accelerated, so that the use cost and the maintenance cost of the automobile are increased. In addition, the more obvious defect of the matrix type LED car lamp is that the matrix type LED car lamp has lower resolution of projected patterns in the projection process, so that the projection effect is greatly reduced.

Another technique is to apply a DLP (Digital Light Processing) to a vehicle lamp, so as to implement vehicle lamp projection. A Digital Micromirror device (DMD for short) of the car lamp can present a projection pattern in front of the car by controlling the working states of a plurality of micromirrors. In particular, the micro-mirrors are capable of reflecting light generated by the light source and the micro-mirrors are capable of achieving a deflection of ± 12 ° under the control of the electrodes. When the deflection angle of micromirror is +/-12 °, micromirror is in the open state, micromirror can be right the light beam that the light source sent reflects, the process light beam after micromirror reflection can get into a projection lens, and by projection lens jets out to the road surface in the vehicle place ahead of traveling on. When the deflection angle of the micro reflector is-12 degrees, the micro reflector is in a closed state, and the light beam generated by the light source cannot reach the micro reflector, that is, the micro reflector does not reflect the light beam generated by the light source, that is, when the micro reflector is in the closed state, the light beam generated by the light source cannot reach the projection lens. In other words, in the process of implementing projection of the vehicle lamp by applying the DLP technology, light which needs to be reflected is reflected according to content to be projected, light which does not need to be reflected is absorbed, and then the vehicle lamp can be projected while illuminating.

And there are many problems in the projection process of the car light by applying the DLP technology. First, the car light to which the DLP technology is applied can be clearly imaged only in a small field of view due to the limitation of the deflection angle of the micromirror of the digital micromirror device. Secondly, when the micro-mirror is in an open state, the light energy of the light source of the vehicle lamp is the largest, the brightness is the largest, and when the micro-mirror is in a close state, the brightness is the lowest, so that the light energy utilization rate of the light beam generated by the light source is reduced. In addition, the car light usually needs to be projected under the condition of background light, high-contrast imaging can be guaranteed only by enhancing the light power, but the actual light efficiency of the car light is low and is only about 20%. Moreover, the heating of the car light is also intensified while the luminous power is increased to ensure the projection effect, so that the car light projected by applying the DLP technology also faces a severe heat dissipation problem.

Disclosure of Invention

The invention aims to provide a vehicle lamp projection device and a projection method thereof, wherein the vehicle lamp projection device is applied to a vehicle and enables the vehicle to present a projection pattern in a surrounding area.

Another object of the present invention is to provide a vehicle lamp projection device and a projection method thereof, wherein the vehicle lamp projection device can present the projection pattern in an area around the vehicle in a scanning manner.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the vehicle lamp projection apparatus includes an illumination unit and an MEMS scanning mirror, wherein the illumination unit provides a light source, and the MEMS scanning mirror can reflect a projection beam generated by the light source according to a rotation rule, so as to project the projection pattern in a projection area in a scanning manner.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the vehicle lamp projection apparatus presents the projection pattern in the projection area in a scanning manner by the MEMS scanning mirror, that is, the vehicle lamp projection apparatus can "draw" the projection pattern in the projection area, thereby realizing afocal projection.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the illumination unit of the vehicle lamp projection apparatus includes a collimating lens, the collimating lens is correspondingly disposed at one side of the light source, and the projected light beam passing through the collimating lens has a higher collimation degree, which is beneficial to improving the utilization rate of light energy.

Another objective of the present invention is to provide a vehicular lamp projection apparatus and a projection method thereof, wherein the illumination unit of the vehicular lamp projection apparatus includes a beam combining lens, and the beam combining lens can combine a plurality of projection light beams into one beam, which is beneficial to provide the quality of the projection light beam, thereby ensuring the resolution of the projection pattern presented by the vehicular lamp projection apparatus in the projection area.

Another objective of the present invention is to provide a vehicular lamp projection apparatus and a projection method thereof, wherein the illumination unit of the vehicular lamp projection apparatus includes a beam combining collimating lens, and the projection light beams passing through the beam combining collimating lens can be combined into a light beam with higher collimation.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the illumination unit of the vehicle lamp projection apparatus includes a shaping cylindrical mirror, the shaping cylindrical mirror is disposed at one side of the beam combiner, and the projected light beam after beam combining can form a light spot with a size adapted to that of the MEMS scanning mirror after passing through the shaping cylindrical mirror, so that the reflectivity of the MEMS scanning mirror to the projected light beam is maximized, thereby reducing the loss of the projected light beam in the transmission process and improving the utilization rate of light energy.

Another objective of the present invention is to provide a vehicular lamp projection apparatus and a projection method thereof, wherein the vehicular lamp projection apparatus includes a projection unit, and the projection unit is capable of displaying the size of the projection pattern in the projection area according to a predetermined ratio.

Another object of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the projection unit of the vehicle lamp projection apparatus is capable of correcting aberration of the projection pattern presented in the projection area, which is beneficial to improve sharpness of the projection pattern presented in the projection area by the vehicle lamp projection apparatus, thereby ensuring resolution of the projection pattern. Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the vehicle lamp projection apparatus includes a reflection unit, and the reflection unit can reflect the projection light beam passing through the MEMS scanning mirror into the projection area, so as to present the projection pattern in the projection area, so that the vehicle lamp projection apparatus can present the projection pattern in different projection areas.

Another object of the present invention is to provide a vehicle lamp projection device and a projection method thereof, wherein the vehicle lamp projection device can clearly present the projection image in the projection area.

Another object of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the light source is implemented as a laser light source, the color gamut of the laser light source is wide, and the energy of the laser light source is strong, so as to enhance the resolution of the projection pattern presented in the projection area while improving the illumination effect of the vehicle lamp projection apparatus.

Another object of the present invention is to provide a vehicular lamp projection system and a projection method thereof, wherein the vehicular lamp projection device is capable of projecting the projection pattern with vivid color and real color in the projection area.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the light source is a three-primary-color laser light source, and the three-primary-color pure-color laser light is mixed according to a certain proportion to obtain rich colors, so that the vehicle lamp projection apparatus can project the projection pattern with vivid color and real color.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the vehicle lamp projection apparatus includes a control unit, and the control unit can control the state of the MEMS scanning mirror according to the content of the projection pattern, so that the MEMS scanning mirror reflects the projection beam according to the rotation rule, so as to completely present the projection pattern in a scanning manner in the projection area.

Another objective of the present invention is to provide a vehicular lamp projecting apparatus and a projecting method thereof, wherein the control unit of the vehicular lamp projecting apparatus can control the light source to emit the projection light beam according to a light beam generation rule, so that the color of the projection light beam is consistent with the color of the corresponding projection pattern, thereby facilitating to present the projection pattern with vivid color in the projection area.

Another objective of the present invention is to provide a vehicle lamp projection apparatus and a projection method thereof, wherein the control unit can synchronously control the light source and the MEMS scanning mirror to be synchronously matched, and further, when the MEMS scanning mirror rotates according to the rotation rule, the light source also adjusts the projection light beam according to the light beam generation rule, so that an image formed by scanning the projection light beam reflected by the MEMS scanning mirror in the projection area is consistent with the projection pattern.

Another object of the present invention is to provide a vehicular lamp projection system and a projection method thereof, wherein the MEMS galvanometer of the vehicular lamp projection device has a small volume, so that the volume of the vehicular lamp projection device is reduced, and the installation space is further reduced.

In one aspect, the present invention provides a vehicular lamp projection apparatus, comprising:

a light source, wherein the light source is capable of generating a projection beam; and

and the MEMS scanning mirror is arranged on one side of the light source and can reflect the projection light beam according to a rotation rule and project a projection pattern in a projection area in a scanning mode.

According to an embodiment of the invention, the car light projection device comprises a collimating mirror, the collimating mirror is oppositely arranged on one side of the light source, the projection light beam generated by the light source can reach the collimating mirror, and the collimating mirror can collimate the projection light beam.

According to an embodiment of the present invention, the car light projection device includes a beam combiner, wherein the beam combiner is disposed at one side of the collimating mirror, the projection light beams passing through the collimating mirror can reach the beam combiner, and the beam combiner can combine the projection light beams into one beam.

According to an embodiment of the present invention, the car light projection device includes a beam combination collimating mirror, wherein the beam combination collimating mirror is disposed at one side of the light source, the projection light beam generated by the light source can reach the beam combination collimating mirror, and the beam combination collimating mirror can collimate the projection light beam and can combine the projection light beam into a beam.

According to an embodiment of the present invention, the vehicular lamp projection device includes a shaping cylindrical mirror, wherein the shaping cylindrical mirror is disposed between the beam combiner and the MEMS scanning mirror, the projection beam passing through the beam combiner can pass through the shaping cylindrical mirror and reach the MEMS scanning mirror, and the projection beam passing through the shaping cylindrical mirror can form a light spot with a size matched with a size of the MEMS scanning mirror.

According to one embodiment of the invention, the car light projection device comprises a projection unit which is oppositely arranged on one side of the MEMS scanning mirror and can present the size of the projection pattern in the projection area according to a preset proportion.

According to an embodiment of the present invention, the car light projection device includes a reflection unit, the reflection unit is disposed at one side of the projection unit, the projection beam passing through the projection unit can reach the reflection unit, and the reflection unit can project the projection beam into a preset projection area.

According to one embodiment of the invention, the vehicle lamp projection device comprises a control unit, the control unit is communicably connected to the MEMS scanning mirror, and the control unit controls the MEMS scanning mirror to reflect the projection light beam according to the rotation rule.

According to an embodiment of the present invention, the control unit of the vehicle lamp projection device is communicably connected to the light source, and the control unit is capable of controlling the light source to emit the projection light beam in accordance with a light beam generation rule while controlling the MEMS scanning mirror to rotate in accordance with the rotation rule.

According to one embodiment of the invention, the light source is selected from the group consisting of: the LED light source array comprises one or a combination of a laser array, a three-primary-color laser array, an LED light source array or a three-primary-color LED light source array.

According to one embodiment of the invention, the MEMS scanning mirror is a combination of two orthogonal MEMS one-dimensional scanning galvanometers and/or a MEMS two-dimensional scanning galvanometer.

According to one aspect of the present invention, there is provided a projection method for a vehicle lamp projection apparatus, the method comprising the steps of:

(a) emitting a projection light beam by a light source; and

(b) a projection pattern is projected in a scanning manner in a projection area by a MEMS scanning mirror according to a rotation rule.

According to an embodiment of the present invention, the step (b) further comprises the step of reflecting the projection beam by the MEMS scanning mirror according to the rotation rule.

According to an embodiment of the present invention, the step (a) is followed by the step (c) of collimating the projection beam.

According to one embodiment of the present invention, the step (c) is followed by the step (d) of combining the projection beams.

According to one embodiment of the present invention, the step (d) is followed by the step (e) of forming the projection beam into a spot on the MEMS scanning mirror that is adapted to the size of the MEMS scanning mirror.

According to an embodiment of the present invention, the step (e) is further followed by the step (f) of adjusting the size of the projected pattern by a projection unit.

According to one embodiment of the present invention, step (f) is followed by step (g) of reflecting the projection beam past the MEMS scanning mirror into the projection area.

Drawings

Fig. 1 is a schematic view of a vehicle lamp projection apparatus according to a preferred embodiment of the invention.

Fig. 2A is a schematic diagram illustrating an operating state of the MEMS scanning mirror of the vehicular lamp projecting device according to the above preferred embodiment of the invention.

Fig. 2B is a schematic diagram of a scanning path of the MEMS scanning mirror of the vehicular lamp projection apparatus according to the above preferred embodiment of the invention.

Fig. 3 is a schematic view of an application scenario of the vehicular lamp projection device according to the above preferred embodiment of the invention.

FIG. 4 is a schematic view of a vehicle lamp projector according to another preferred embodiment of the invention.

Fig. 5 is a schematic view of an application scenario of the vehicular lamp projection device according to the above preferred embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 4 of the specification, a vehicle lamp projection apparatus 100 according to a preferred embodiment of the present invention will be described in the following description, wherein the vehicle lamp projection apparatus 100 can be applied to a vehicle 200, and can present a projection pattern 300 in a scanning manner in an area around the vehicle 200, thereby realizing projection while illuminating.

Specifically, referring to fig. 1, the car light projection device 100 includes an illumination unit 101 and a MEMS scanning mirror 20, wherein the illumination unit 101 provides at least one light source 10, the light source 10 projects a projection light beam 400, the projection light beam 400 can reach the MEMS scanning mirror 20, the MEMS scanning mirror 20 can reflect the projection light beam 400 according to a rotation rule, the reflected projection light beam 400 reaches a projection area, and the projection pattern 300 is displayed in the projection area, so that the car light projection device 100 can illuminate the driving road of the car 200 and can project the driving road.

Preferably, the light source 10 is a laser light source array, i.e. the projection light beam 400 is a laser light beam. The laser light source has a wide color gamut and high light source energy, so that the brightness of the vehicle lamp projection device 100 is improved, the resolution of a projection pattern is also improved, and the projection effect is enhanced. That is, the light source 10 of the vehicular lamp projection device can provide good resolution to the projection pattern presented in the projection area without increasing the optical power, thereby being beneficial to reducing the heat generated by the vehicular lamp projection device 100 during the operation. Moreover, the laser light source has stable performance and long service life, so that the maintenance cost of the car light projection device 100 in the use process is greatly reduced, and the service life of the car light projection device 100 is also prolonged. More preferably, the light source 10 is a three-primary-color laser light source array, that is, the projection light beam 400 is a three-primary-color pure-color laser light beam, that is, a red laser light beam, a green laser light beam, and a blue laser light beam, the saturation of the projection light beam 400 obtained by the three-primary-color laser light source array is high, and rich colors can be obtained by mixing the three-primary-color pure-color lasers according to a certain proportion, so that the vehicle lamp projection device can project vivid and true-colored projection patterns, and the practicability of the vehicle lamp projection device is increased. It will be understood by those skilled in the art that the light source 10 may also be implemented as a white laser array, thereby presenting the projected pattern 300 in the projection area as a black and white image.

It should be noted that the type of the light source 10 is not limited, the specific embodiment of the light source 10 is only an example, and the light source 10 can also be implemented as one or a combination of a white LED light source array, a three primary color LED light source array, or other types of light sources known in the art.

Further, referring to fig. 2A, the MEMS scanning mirror 20 can be driven to rotate, and when the maximum rotation angle of the MEMS scanning mirror is γ, the maximum scanning angle α that the projection light beam 400 passing through the MEMS scanning mirror 20 can form is twice as large as the maximum rotation angle γ. It should be noted that the MEMS scanning mirror 20 can be controlled to stay at any position between the maximum rotation angles γ, and reflect the projection beam 400, so as to project the projection pattern in a scanning manner within the projection area. The specific size of the maximum rotation angle γ of the MEMS scanning mirror shown in fig. 2A is merely illustrative and should not be construed as limiting the scope and content of the vehicular lamp projection device of the present invention.

Preferably, the MEMS scanning mirror 20 is implemented as a MEMS two-dimensional scanning galvanometer, which can rotate in the horizontal direction and the vertical direction, and when the projection light beam 400 enters the MEMS two-dimensional scanning galvanometer, the MEMS two-dimensional scanning galvanometer reflects the projection light beam 400 according to the rotation rule, so that the projection light beam 400 is reflected into the projection area and generates a light spot, and then the projection pattern 300 is scanned into the projection area in a dotting manner, and the projection pattern 300 is displayed in the projection area. Further, the projection harness 100 projects the projection pattern 300 within the projection region in a vector scan manner as shown in fig. 2B. That is, the car light projection device 100 can draw the projection pattern 300 in the projection area by the MEMS scanning galvanometer 20, so as to realize afocal projection, and thus, the car light projection device 100 can still image clearly in the projection area at a longer distance.

It should be noted that the type of the MEMS scanning mirror 20 is not limited, and the MEMS scanning mirror can be implemented as, but not limited to, a combination of two orthogonal MEMS one-dimensional scanning galvanometers or one or more of other types known in the art. Also, the driving manner of the MEMS scanning mirror 20 is not limited, and the MEMS scanning mirror 20 can be implemented to realize high-speed rotation by, but not limited to, electrostatic driving, electrothermal driving, electromagnetic driving, piezoelectric driving, and other driving manners known in the art. It is to be understood that the specific illustrations in the drawings and the description of the MEMS scanning mirror are exemplary only and are not intended as limitations on the scope or content of the vehicular lamp projection device of the present invention.

According to a preferred embodiment of the present invention, the vehicular lamp projecting device 100 further comprises a control unit 30, the control unit 30 can control the MEMS scanning mirror 20 and the light source 10 respectively, so that the MEMS scanning mirror 20 and the projection light beam 400 can cooperate with each other to present the projection pattern 300 in the projection area.

Specifically, the control unit 30 is communicatively connected to the MEMS scanning mirror 20, and the control unit 30 can control the state of the MEMS scanning mirror 20 according to the content of the projection pattern 300, so that the MEMS scanning mirror 20 reflects the projection beam 400 according to the rotation rule to present the projection pattern 300 in a scanning manner within the projection area. Specifically, the rotation rules include, but are not limited to, the rotation angle, the rotation time, the rotation direction, the rotation frequency, and the like of the MEMS scanning mirror 20. Preferably, the control unit 30 is communicably connected to the control computer of the automobile 200 and can receive in real time the instructions of the control computer of the automobile 200, so as to generate the corresponding rotation rule, and the MEMS scanning mirror 20 executes the rotation rule to reflect the projection light beam 400, so as to present the corresponding outline and image of the projection pattern 300 in the projection area. It should be noted that the rotation rule corresponds to the projection pattern 300 one to one, and the projection pattern 300 corresponds to the command of the control computer of the automobile 200 one to one, so that the automobile lamp projection system 100 can present the projection pattern 300 corresponding to the command sent by the control computer of the automobile 200 in the projection area. That is, the control unit 30 determines the projection pattern 300 according to the instruction issued by the automobile 200, and generates the corresponding rotation rule according to the projection pattern 300, and further controls the MEMS scanning mirror 20 to rotate according to the rotation rule. For example, when the automobile 200 is ready to turn left, the control computer of the automobile 200 sends out an instruction corresponding to the left turn, the control unit 30 of the car light projection device 100 determines that the projection pattern 300 is an arrow of the left turn, and then generates the rotation rule corresponding to the arrow of the left turn, the MEMS scanning mirror 20 executes the rotation rule, rotates according to the rotation rule, and changes the reflection angle of the projection light beam 400 while rotating, and then projects the projection light beam 400 into the projection area, and scans the arrow of the left turn in the area in front of the automobile 200.

Further, wherein the control unit 30 of the car light projection device 100 is communicably connected to the light source 10, the control unit 30 can control the light source 10 to emit the projection light beam 400 according to a light beam generation rule, so that the color of the projection light beam 400 is consistent with the color of the corresponding projection pattern 300, thereby facilitating the projection pattern 300 with vivid colors to be presented in the projection area while illuminating. The light beam generation rules may be implemented to include, but are not limited to, whether the light source 10 is in an on state or an off state, the time for the light source 10 to switch between the on state and the off state, the switching frequency, the operating efficiency of the light source 10, the projection angle, and the brightness and color of the projection light beam 400 generated by the light source 10, etc. The control unit 30 is communicably connected to the control computer of the automobile 200, and can receive a command from the control computer of the automobile 200 in real time, and generate the corresponding light beam generation rule. The light source 10 executes the light beam generation rule to emit the corresponding projection light beam 400, wherein the light beam generation rule corresponds to the projection pattern 300 one by one, and the projection pattern 300 corresponds to the command of the control computer of the automobile 200 one by one. For example, when the light source 10 is implemented as a three-primary-color laser array, the control unit 30 can control the brightness of the red, green and blue laser beams generated by the light source 10, so as to scan an image corresponding to the color of the projection pattern 300 corresponding to the command of the control computer of the automobile 200 in the projection area, or the control unit 30 can adjust the power and projection angle of the light source 10 according to the light beam generation rule, so as to control the projection light beam 400 to reach the energy level of the target color, and to correspond to the color coordinates of the projection pattern 300.

Furthermore, the beam generation rule corresponds to the rotation rule, so that the MEMS scanning mirror 20 and the projection beam 400 can cooperate with each other to present the projection pattern 300 corresponding to the command issued by the control computer of the automobile 200 in the projection area. That is to say, the control unit 30 can synchronously control the light source 10 and the MEMS scanning mirror 20, so that the projection light beam 400 generated by the light source 10 is synchronously matched with the MEMS scanning mirror 20, and further, while the MEMS scanning mirror 20 rotates according to the rotation rule, the light source 10 also adjusts the projection light beam 400 according to the light beam generation rule, so that the projection pattern 300 formed in the projection area by the projection light beam 400 reflected by the MEMS scanning mirror 20 corresponds to an instruction sent by a control computer of the automobile 200. Moreover, it is beneficial to improve the utilization rate of the light efficiency of the projection light beam 400 generated by the light source 10 and reduce the heat generated by the vehicle lamp projection device 100.

Further, the lighting unit 101 of the car light projection device 100 includes a beam shaping unit 40, wherein the beam shaping unit 40 includes a collimating mirror 41, the collimating mirror 41 is correspondingly disposed at one side of the light source 10, the projection light beam 400 generated by the light source 10 can reach the collimating mirror, and the collimating mirror 41 can collimate the projection light beam 400, so as to obtain a parallel light beam with high collimation degree, so as to improve the quality of the projection light beam 400.

According to a preferred embodiment of the present invention, the beam shaping unit 40 further includes a beam combining mirror 42, the beam combining mirror 42 is disposed at one side of the collimating mirror 41, the projection light beams 400 passing through the collimating mirror 41 are incident on the beam combining mirror 42, and the plurality of projection light beams 400 passing through the beam combining mirror 42 can be combined into one light beam, which is beneficial to providing the quality of the projection light beams 400, thereby ensuring the resolution of the projection pattern 300 presented by the car light projection apparatus 100 in the projection area. It is worth mentioning that the beam combining mirror 42 can combine the projection light beams 400 incident into the beam combining mirror 42 from different directions into one projection light beam 400 in the same direction. Referring to fig. 1, the three projection light beams 400 generated by the light sources 10 have different directions, i.e., horizontal to the right, vertical to the bottom, and vertical to the top, and when the projection light beams 400 having three different directions enter the beam combiner 42, they can be combined into one horizontal beam to the right. Further, when the light source 10 is implemented as a three-primary-color laser array, the red laser beam, the green laser beam and the blue laser beam generated by the light source 10 are mixed into one projection beam 400 having a color corresponding to the projection pattern 300 after passing through the beam combiner 42, so that an image having a color consistent with that of the projection pattern 300 corresponding to an instruction of the control computer of the automobile 200 can be scanned in the projection area.

Further, the beam shaping unit 40 includes a shaping cylindrical mirror 43, the shaping cylindrical mirror 43 is disposed at one side of the beam combining mirror 42, and the projection beam 400 after being combined passes through the shaping cylindrical mirror 43, so that a light spot with a size adapted to the size of the MEMS scanning mirror 20 can be formed, so that the reflectance of the MEMS scanning mirror 20 to the reflection beam 400 is maximized. That is, the shaping cylindrical mirror 43 is disposed between the beam combining mirror 42 and the MEMS scanning mirror 20. Preferably, the reflected light beam 400 passing through the shaping cylindrical mirror 43 can form a light spot with the same size as the MEMS scanning mirror 20, so that the light energy that the reflected light beam 400 can reach the MEMS scanning mirror 20 can be maximized, and the utilization rate of the MEMS scanning mirror 20 and the light source 10 is improved, and meanwhile, the loss of the projected light beam 400 in the transmission process is reduced, and the utilization rate of the light energy is improved.

The car light projection device 100 further comprises a projection adjusting unit 50, wherein the projection adjusting unit 50 comprises a projection unit 51, the projection unit 51 is oppositely disposed on one side of the MEMS scanning mirror 20, and is capable of presenting the size of the projection pattern 300 in the projection area according to a predetermined ratio. Moreover, the projection unit 51 of the projection adjustment unit 50 can correct the aberration of the projection pattern 300 appearing in the projection area, which is beneficial to improving the sharpness of the projection pattern 300 appearing in the projection area by the vehicle lamp projection device 100, and further ensuring the resolution of the projection pattern 300. For example, the projection pattern that can be formed by the projection beam 400 passing through the MEMS scanning mirror 20 has an initial size, the projection unit 51 can expand the initial size by a predetermined magnification of 5 times, and after the projection beam 400 passing through the MEMS scanning mirror 20 passes through the projection unit 51, the projection pattern 300 can be displayed in the projection area by a size of 5 times of the initial size, so that the user or passerby on the road can clearly recognize the projection pattern. That is, the MEMS scanning mirror 20 with a small volume can also present the large-sized projection pattern 300 in a scanning manner within the projection area by cooperating with the projection unit 51, and the projection pattern 300 formed within the projection area can have a good resolution by the projection unit 51. Preferably, the projection unit 51 may be implemented as, but not limited to, a pair of lenses disposed at an opposite interval. It should be understood that the specific embodiment of the projection unit 51 and the specific adjustable scale factor are only used as references, and should not be construed as limiting the content and scope of the car light projection device of the present invention.

Preferably, the projection adjusting unit 50 of the car light projection device 100 includes a reflection unit 52, and the reflection unit 52 can reflect the projection light beam 400 passing through the MEMS scanning mirror 20 to the projection area, so as to present the projection pattern 300 in the projection area, which is beneficial for the car light projection device 100 to present the projection pattern 300 in different projection areas. Preferably, the reflection unit 52 is disposed at one side of the projection unit 51, the projection light beam 400 passing through the projection unit 51 can reach the reflection unit 52, and the reflection unit 52 can project the projection light beam 400 into the preset projection area to present the projection image 300 in the projection area. Preferably, the reflection unit 52 may be implemented as, but not limited to, a plane mirror. The reflection unit 52 can make the lamp projection system 100 more compact, smaller, and reduce the installation space.

Fig. 1 and 3 show a schematic view of an application of the lamp projection device, the lamp projection device 100 is installed in a headlight position of the automobile 200, and the light source 10 of the lamp projection device 100 can illuminate a driving road of the automobile 200 when the automobile 200 is in a driving process. When a pedestrian passes by the automobile 200 in front of the driving, the control computer of the automobile 200 gives an alarm instruction, and the control unit 30 of the car light projection system 100 receives the instruction of the control computer of the automobile 200 in real time, so as to generate the corresponding rotation rule and the corresponding light beam generation rule. The control unit 30 synchronously controls the light source 10 and the MEMS scanning mirror 20, so that the projection light beam 400 generated by the light source 10 is synchronously matched with the MEMS scanning mirror 20, and further, when the MEMS scanning mirror 20 rotates according to the rotation rule, the light source 10 also adjusts the projection light beam 400 according to the light beam generation rule, so that the projection pattern 300 formed in the projection area by the projection light beam 400 reflected by the MEMS scanning mirror 20 corresponds to a warning instruction sent by a control computer of the automobile 200.

Specifically, the projection light beam 400 emitted by the light source 10 and having different directions sequentially passes through the collimating mirror 41, the beam combining mirror 42 and the shaping cylindrical mirror 43 of the beam shaping unit 40, so as to obtain the projection light beam 400 having high collimation degree, the projection light beam 400 can generate a light spot having a size adapted to that of the MEMS scanning mirror 20, the projection light beam 400 is reflected by the MEMS scanning mirror 20 according to the rotation rule, the reflected projection light beam 400 sequentially passes through the projection unit 51 and the reflection unit 52 of the projection adjusting unit 50, and the projection pattern 300 having a predetermined ratio is projected in each preset projection area in a scanning manner. Preferably, the projection pattern 300 corresponding to the command sent by the control computer of the automobile 200 may be a traffic warning icon. That is to say, the color and size of the projection pattern 300 are consistent with those of the traffic warning icon, so as to draw the attention of pedestrians and vehicles, and further play a warning role, and improve the driving safety. It should be understood that the contents and scope of the projection pattern 300 are merely exemplary and should not be construed as limiting the contents and scope of the vehicle lamp projection device of the present invention. The projected pattern 300 may also be embodied as, but not limited to, an arrow sign, a zebra pattern, a brand logo, a navigation route, advertising information, and the like.

It is worth mentioning that the position where the lamp projection device 100 is installed in the automobile 200 is not limited, and the lamp projection device 100 may be implemented as, but not limited to, a headlight, a front fog lamp, a front steering lamp, a rear indicator lamp, a rear fog lamp, a back-up lamp, a brake lamp, a high-mount brake lamp, etc. installed in the automobile 200.

Description figures 4 and 5 show another embodiment of the car light projection device 100, the car light projection device 100A is applied to a car 200A, and can present a projection pattern 300A in a scanning manner in an area around the car 200A, so as to realize projection while illuminating. Fig. 4 and 5 in the specification show that the vehicle lamp projection device 100A is different from the vehicle lamp projection device 100 shown in fig. 1 to 3 in that the light beam adjusting unit 40A of the vehicle lamp projection device 100A includes a beam combining collimator lens 41A and a shaping cylindrical mirror 42A, wherein the beam combining cylindrical mirror 41A is disposed between the light source 10A and the shaping cylindrical mirror 42A. The projection light beam 400A generated by the light source 10 can reach the beam combination collimating mirror 41A, and the projection light beam 400A passing through the beam combination collimating mirror 41A is combined into a light beam with higher collimation degree.

For example, the lamp projection device 100A is installed at a headlight position of the automobile 200A, and the light source 10A of the lamp projection device 100A can illuminate a driving road of the automobile 200A when the automobile 200A is in driving. When the automobile 200A is ready to turn right, the control computer of the automobile 200A makes a right-turn instruction, and the control unit 30A of the automobile lamp projection system 100A receives the instruction of the control computer of the automobile 200A in real time, so as to generate the corresponding rotation rule and the corresponding light beam generation rule. The control unit 30A synchronously controls the light source 10A and the MEMS scanning mirror 20A, so that the projection light beam 400A generated by the light source 10A is synchronously matched with the MEMS scanning mirror 20A, and further, while the MEMS scanning mirror 20A rotates according to the rotation rule, the light source 10A also adjusts the projection light beam 400A according to the light beam generation rule, so that the projection pattern 300A formed in the projection area by the projection light beam 400A reflected by the MEMS scanning mirror 20A corresponds to a right steering command sent by a control computer of the automobile 200A, so as to remind pedestrians and vehicles around the automobile 200 of attention.

Specifically, referring to fig. 4 and 5, the projection light beams 400 emitted by the light source 10A and having the same direction sequentially pass through the beam combiner collimation 41A and the shaping cylindrical mirror 42A of the beam shaping unit 40, so as to obtain the projection light beams 400A having high collimation, and the projection light beams 400A can generate light spots with sizes matched with the size of the MEMS scanning mirror 20A. The projection light beam 400A is reflected by the MEMS scanning mirror 20A according to the rotation rule, and the projection light beam 400A after reflection sequentially passes through the projection unit 51A and the reflection unit 52A of the projection adjustment unit 50A, so that the projection pattern 300A with a predetermined ratio is projected in each preset projection area in a scanning manner.

According to another aspect of the present invention, the present invention further provides a projection method of a lamp projection apparatus, wherein the projection method comprises the steps of:

(a) a light source 10 emits a projection light beam 400 according to a light beam generation rule; and

(b) a projection pattern 300 is projected in a scanning manner in a projection area by a MEMS scanning mirror 20 according to a rotation rule. In the step (b), the MEMS scanning mirror 20 reflects the projection beam 400 according to the rotation rule. The MEMS scanning mirror 20 reflects the projection light beam 400 according to the rotation rule, so that the projection light beam 400 is reflected into the projection area and generates a light spot, and then scans the projection pattern 300 into the projection area in a dotting manner, and displays the projection pattern 300 in the projection area. Further, the projection harness 100 projects the projection pattern 300 within the projection region in a vector scan manner as shown in fig. 2B. That is, the car light projection device 100 can draw the projection pattern 300 in the projection area by the MEMS scanning galvanometer 20, so as to realize afocal projection, and thus, the car light projection device 100 can still image clearly in the projection area at a longer distance.

Further, step (c) of collimating the projection beam 400 by a collimator lens 41 is included after step (a). That is to say, the projection light beam 400 generated by the light source 10 can reach the collimating mirror, and the collimating mirror 41 can collimate the projection light beam 400, so as to obtain a parallel light beam with high collimation degree, thereby improving the quality of the projection light beam 400.

Further, the step (c) is followed by the step (d) of combining the projection light beams 400 by a beam combining mirror 42. The projection light beams 400 passing through the collimating mirror 41 are incident into the beam combining mirror 42, and a plurality of projection light beams 400 passing through the beam combining mirror 42 can be combined into one light beam, which is beneficial to providing the quality of the projection light beams 400, thereby ensuring the resolution of the projection pattern 300 presented by the vehicle lamp projection device 100 in the projection area.

Further, step (d) is followed by step (e) of forming the projection beam 400 into a spot on the MEMS scanning mirror 20 that is adapted to the size of the MEMS scanning mirror 20. Specifically, after the combined projection light beam 400 passes through a shaping cylindrical mirror 43, a light spot with a size matched with that of the MEMS scanning mirror 20 can be formed, so that the reflectivity of the MEMS scanning mirror 20 to the reflection light beam 400 is maximized, and the light efficiency utilization rate of the MEMS scanning mirror 20 and the light source 10 is improved.

Further, the step (e) is followed by a step (f) of adjusting the size of the projected pattern by a projection unit 51. Specifically, the projection unit 51 can change the ray path of the projection beam 400 and display the size of the projection pattern 300 in a predetermined ratio in the projection area.

Further, the step (f) is followed by a step (g) of reflecting the projection beam 400 passing through the MEMS scanning mirror 20 into the projection area. That is, the reflection unit 52 can reflect the projection light beam 400 passing through the MEMS scanning mirror 20 to the projection area, so as to present the projection pattern 300 in the projection area, which is beneficial for the car light projection device 100 to present the projection pattern 300 in different projection areas.

It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily conceivable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A vehicular lamp projection device, comprising:

a light source comprising a white laser light source, wherein said light source is capable of generating a projection beam;

the beam combining mirror is arranged on one side of the light source, the projection light beams generated by the light source can reach the beam combining mirror, and the beam combining mirror can combine the projection light beams in the same direction or different directions into one beam;

the shaping cylindrical mirror is oppositely arranged on one side of the beam combining mirror, and the projection light beam after beam combination passes through the shaping cylindrical mirror;

the MEMS scanning mirror is arranged on one side of the shaping cylindrical mirror, the projection light beam passing through the shaping cylindrical mirror can reach the MEMS scanning mirror, the projection light beam passing through the shaping cylindrical mirror can form light spots matched with the size of the MEMS scanning mirror, the MEMS scanning mirror can reflect the projection light beam according to a rotation rule and project a projection pattern in a projection area in a scanning mode; a control unit communicably connected to the MEMS scanning mirror and the light source, wherein the control unit can control the MEMS scanning mirror to reflect the projection light beam according to the rotation rule, and can control the light source to emit the projection light beam according to a light beam generation rule while controlling the MEMS scanning mirror to rotate according to the rotation rule; and

the projection unit is oppositely arranged on one side of the MEMS scanning mirror and can enlarge the size of the projection pattern by a preset proportion to be presented in the projection area.

2. The vehicular lamp projection device according to claim 1, wherein the vehicular lamp projection device comprises a collimating mirror disposed opposite to a side of the light source, the light source generates the projection light beam capable of reaching the collimating mirror, and the collimating mirror is capable of collimating the projection light beam.

3. The vehicular lamp projection device according to claim 2, wherein the beam combining mirror is disposed at a side of the collimating mirror, the projection light beams passing through the collimating mirror can reach the beam combining mirror, and the beam combining mirror can combine the projection light beams into one beam.

4. The vehicular lamp projection device according to claim 1, wherein the beam combiner is a beam combiner collimator capable of collimating the projection beams and combining the projection beams into one beam.

5. The vehicular lamp projection device according to claim 1, wherein the vehicular lamp projection device comprises a reflection unit, the reflection unit is disposed at one side of the projection unit, and the projection light beam passing through the projection unit can reach the reflection unit, and the reflection unit can project the projection light beam into the preset projection area.

6. The vehicular lamp projection device according to any one of claims 1 to 5, wherein the light source is selected from the group consisting of: one or a combination of a laser array and an LED light source array.

7. The vehicular lamp projection device according to claim 6, wherein the light source is selected from the group consisting of: one or a combination of a tricolor laser array and a tricolor LED light source array.

8. The vehicular lamp projection device according to claim 6, wherein the MEMS scanning mirror is a combination of two orthogonal MEMS one-dimensional scanning galvanometers and/or a MEMS two-dimensional scanning galvanometer.

9. A projection method for a vehicle lamp projection apparatus, said projection method comprising the steps of:

(a) emitting a projection light beam by a light source, wherein the light source comprises a white laser light source;

(b) combining the projection beams by a beam combining mirror;

(c) the combined projection light beam passes through the shaping cylindrical mirror by virtue of the shaping cylindrical mirror;

(d) projecting a projection pattern in a projection area in a scanning mode by an MEMS scanning mirror according to a rotation rule, wherein the projection light beam passing through the shaping cylindrical mirror forms a light spot matched with the size of the MEMS scanning mirror on the MEMS scanning mirror;

(d1) the control unit can control the MEMS scanning mirror to reflect the projection light beam according to the rotation rule, and control the light source to emit the projection light beam according to a light beam generation rule while controlling the MEMS scanning mirror to rotate according to the rotation rule; and

(d2) and enlarging the size of the projection pattern by a predetermined ratio by a projection unit to present the enlarged size in the projection area, wherein the projection unit is oppositely arranged on one side of the MEMS scanning mirror.

10. The projection method of claim 9, wherein step (a) is further followed by the step of (e) collimating the projection beam.

11. The projection method of claim 9, wherein step (d) is followed by the further step of (f) reflecting the projection beam past the MEMS scanning mirror into the projection area.