CN111692569A - Micro-lens array light type switching system and method, welcome lamp and vehicle - Google Patents

Abstract

The invention belongs to the field of automobile lighting, and discloses a microlens array light type switching system, method, welcome lamp and vehicle. The system includes a single microlens array and a light type switching device; the light type switching device is suitable for The variation of the distance between people and vehicles dynamically adjusts the coverage area of the projected light pattern of the microlens array, so that the light carpet projected on the ground through the microlens array is always located between the people and vehicles. The invention continuously adjusts the coverage area of a single microlens array projected light pattern through the light pattern switching device, so that the welcome light blanket always moves with the footsteps of the car owner, and obtains a smooth animation effect.

Description

Microlens array light type switching system, method, welcome light and vehicle

technical field

The invention relates to a microlens array light type switching system, method, welcome lamp and vehicle, and belongs to the field of automobile lighting.

Background technique

Due to the small size and long focal depth of the Micro Lens Array (MLA), images can be clearly displayed on various types of display surfaces, and have been applied in batches in automotive lighting systems. For example, vehicle information can be displayed on the ground through MLA projection technology. Taking the welcome light as an example, nowadays high-end cars generally have their own welcome light function, which is installed under the door or under the rearview mirror. When the driver or passenger is ready to get into the car, the moment the door is opened, the welcome light at the bottom of the door emits light. When the vehicle is turned off and the door is opened, the welcome light is instantly lit to illuminate the ground.

On the one hand, the traditional welcome light can improve the grade of the vehicle, and on the other hand, it can also illuminate the road in the door area for the occupants, making people feel at home in the driving experience, which is welcomed by more and more car owners.

However, the projection pattern through MLA can only project a fixed pattern, that is, only a static pattern can be displayed, and the display of a dynamic pattern cannot be realized. Although through the synergy of multiple MLAs, lighting or extinguishing each MLA in a certain order can achieve some dynamic effects, but the cost is high. At the same time, the cooperation and connection between multiple MLAs is also a technical problem to be overcome. More importantly, it is impossible to achieve smooth and coherent dynamic effects through multi-pattern splicing. To the naked eye, the screen display still has a sense of frustration, which greatly affects users. experience.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a micro-lens array light pattern switching system, method, welcome light and vehicle, which can continuously adjust the coverage area of a single micro-lens array projected light pattern through the light pattern switching device, so that the welcome light blanket can be adjusted continuously. Always follow the owner's footsteps for smooth animations.

In order to achieve the above objective, a first aspect of the present invention provides a microlens array optical type switching system, comprising a single microlens array and an optical type switching device; the optical type switching device is suitable for dynamic adjustment according to changes in the distance between people and vehicles The coverage area of the projected light pattern of the microlens array is such that the light carpet projected on the ground via the microlens array is always located between people and vehicles.

Further, the length of the light carpet is adapted to vary continuously.

Further, each row of the microlens array is in a light-emitting state, and the light type switching device is adapted to bidirectionally adjust the degree of opening and closing of the projection light of the microlens array through the bidirectional rotation of its light shielding member relative to the microlens array, The light shielding member is adapted to move up and down bidirectionally along the column direction of the microlens array.

Further, the light type switching device includes a person-vehicle distance detection module, a vehicle-mounted controller, a switching controller, a driving module and a shading component; the person-vehicle distance detection module is suitable for real-time detection of the distance between people and vehicles, and The distance is transmitted to the on-board controller; the on-board controller is adapted to store the distance between two adjacent persons and vehicles detected, determine the steering according to the comparison result of the two distances, and transmit the steering information to the The switching controller; the corresponding relationship table between the distance between people and vehicles and the rotation angle of the shading member is pre-stored in the switching controller, and the switching controller obtains the corresponding rotation angle of the shading member from the corresponding relationship table, and converts the steering and the rotation angle. It is transmitted to the driving module, so that the driving module drives the shading member to rotate according to the steering and rotation angle, and the driving module is adapted to feed back the rotation angle value to the switching controller in real time.

Further, the light type switching device further includes an identity recognition module, in which the identity recognition module is pre-stored with vehicle owner identity information, which is adapted to detect the facial information of the person approaching the vehicle and associate it with the identity of the vehicle owner. The information is compared to determine whether the person is the owner of the vehicle, and if it is the owner of the vehicle, an enabling signal is sent to the switching controller to start the dynamic adjustment of the projected light pattern.

Further, the projection light of each row of projection units of the microlens array respectively covers a continuous distance on the ground from far and near, and is end-to-end and does not overlap with each other.

A second aspect of the present invention provides a method for switching the light type of a microlens array, comprising the following steps: (1) obtaining the distance L between a person and a vehicle in real time; (2) dynamically adjusting the microlens array according to the change of the distance L between the person and the vehicle The coverage area of the projected light pattern, so that the light carpet projected on the ground via the microlens array is always located between people and vehicles.

Further, the length of the light carpet is adapted to vary continuously.

Further, in the step (1), also by detecting the face information of the person approaching the vehicle and comparing it with the pre-stored vehicle owner identity information to determine whether the person is the vehicle owner, if it is the vehicle owner, just continue. Go to step (2).

Further, the initial value of the person-vehicle distance L for the projection by the microlens array is 4m, and the corresponding initial length of the light carpet is 3m; when the person-vehicle distance L is reduced to 3m, the dynamic adjustment of the projected light pattern is started, As the distance L between the person and the vehicle is further reduced, the length of the light blanket is shortened, and the light blanket is always at a certain distance from the person's feet.

Further, each row of the microlens array emits light, and from top to bottom, the projected light of each row covers a continuous distance on the ground from far and near, and is end-to-end and does not overlap each other; The dynamic adjustment process is as follows: the projected light is blocked along the row direction of the microlens array by a shading component, which is arranged on the top of the microlens array and is suitable for rotating around the microlens array along the column direction of the microlens array, so that the microlens array can The light-emitting area projected to the ground without blocking changes continuously.

A third aspect of the present invention provides a welcome light, which includes the microlens array light type switching system according to any of the technical solutions of the first aspect, and is suitable for performing any one of the second aspect through the microlens array light type switching system. Microlens array light type switching method described in technical solution

A fourth aspect of the present invention provides a vehicle, including the welcome lamp according to any one of the technical solutions of the third aspect.

Through the above technical solutions of the present invention, the coverage area of a single microlens array projected light pattern can be continuously adjusted only by the light pattern switching device, so that the welcome light blanket always moves with the footsteps of the car owner, and a smooth animation effect can be obtained.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description section that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and are used to explain the embodiments of the present invention together with the following specific embodiments, but do not constitute limitations to the embodiments of the present invention. In the attached image:

Fig. 1 is a control principle block diagram of an embodiment of the system of the present invention;

Fig. 2 is the control software flow chart of one embodiment of the method of the present invention;

3 is a schematic diagram of a light carpet projection principle in an embodiment of the system/method of the present invention;

FIG. 4 is a schematic diagram of the switching principle of projection light type in an embodiment of the system/method of the present invention;

FIG. 5 is an effect diagram of the dynamic change of the coverage area of the light blanket in an embodiment of the system/method of the present invention.

Detailed ways

The specific implementations of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

An embodiment of the microlens array light pattern switching system of the present invention includes a single microlens array and a light pattern switching device; the light pattern switching device is adapted to dynamically adjust the projection of the microlens array according to changes in the distance between people and vehicles The coverage area of the light pattern, so that the light carpet projected on the ground through the microlens array is always located between people and vehicles.

In an embodiment of the microlens array light type switching system of the present invention, the length of the light carpet is suitable for continuous change.

In an embodiment of the microlens array optical type switching system of the present invention, each row of the microlens array is in a light-emitting state, and the optical type switching device is adapted to be switched by bidirectional rotation of its light shielding member relative to the microlens array. The degree of opening and closing of the projected light of the microlens array is adjusted bidirectionally, and the light shielding member is suitable for bidirectional movement up and down along the column direction of the microlens array.

As shown in FIG. 1, in an embodiment of the microlens array optical type switching system of the present invention, the optical type switching device includes a person-vehicle distance detection module, a vehicle-mounted controller, a switching controller, a driving module and a light-shielding component; The person-vehicle distance detection module is suitable for detecting the distance between people and vehicles in real time, and transmitting the distance to the vehicle-mounted controller; the vehicle-mounted controller is suitable for storing the distance between the person and vehicle detected twice adjacently, according to the The comparison result of the distance between the two people and vehicles determines the steering, and transmits the steering information to the switching controller; the switching controller pre-stores the correspondence table between the distance between the people and the vehicle and the rotation angle of the shading member, and the switching controller starts from the Obtain the corresponding rotation angle of the shading member in the correspondence table, and transmit the steering and rotation angle to the driving module, so that the driving module drives the shading member to rotate according to the steering and rotation angle, and the driving module is suitable for real-time. Feedback its rotation angle value to the switching controller. Specifically, the drive module can choose a stepper motor, and can monitor its rotation angle data in real time by installing a Hall sensor on the stepper motor, and the rotation angle data is a value relative to a reference zero position, and the reference zero position is a preset value. Absolute value, the torque of the stepper motor automatically returns to zero each time it is powered on.

For example, the two adjacent detection values of the person-vehicle distance detection module are 1.5m and 1.8m respectively in the order of detection time. It can be judged from this that the person is moving away from the vehicle, and it can be determined as the The steering of the stepping motor of the driving module is forward rotation, and the forward rotation corresponds to the upward movement of the shading member, thereby extending the projected light carpet. Conversely, if the detection value of the distance detection module between the person and the vehicle is 1.8m and 1.5m respectively in the order of detection time, it can be judged that the person is moving in the direction of approaching the vehicle, which can be determined as the driving force. The rotation of the module's stepper motor is reversed, which corresponds to the downward movement of the shading member, thereby shortening the projected light blanket. As for the rotation angle of the stepping motor, it can be determined through a pre-stored correspondence table between the distance between the person and the vehicle and the rotation angle of the shading member. The rotation angle is also data relative to the reference zero position. For example, the rotation angle corresponding to the distance of 1.8m between people and vehicles is 20°, then the stepping motor rotates 20°.

In an embodiment of the microlens array optical type switching system of the present invention, the optical type switching device further includes an identity recognition module, and the identity recognition module is pre-stored with vehicle owner identity information, which is suitable for detecting an approaching vehicle by detecting The face information of the person is compared with the identity information of the vehicle owner to determine whether the person is the vehicle owner. If the person is the vehicle owner, an enabling signal is sent to the switching controller to start the dynamic adjustment of the projected light pattern.

In an embodiment of the microlens array light type switching system of the present invention, the projected light of each row of projection units of the microlens array covers a continuous distance on the ground from far and near, and is end-to-end and not mutually exclusive overlapping. For example, as shown in FIG. 3 , the small circle is the actual microlens array 1 , and the large circle is a partial enlarged view thereof. It can be seen from FIG. 3 that in this example, the microlens array 1 has five rows of projection units. From top to bottom, row A, row B, row C, row D, and row E can respectively project a distance of 3m-2.5m relative to the vehicle body. , 2.5m-2m, 2m-1.5m, 1.5m-1m and 1m-0.5m range of five continuous light carpet pattern 2.

In an embodiment of the micro-lens array light type switching system of the present invention, the micro-lens array light type switching system is installed under the vehicle door, and it is judged whether someone is approaching through the captured information of the camera. When it is shortened to 10m, the camera captures the face information, and compares it with the database to determine whether the person is the owner of the car, and if so, the welcome system is activated. According to the camera's judgment of the person's position, when the distance between the person and the vehicle is about 4m, the projection system based on the microlens array light type switching system is activated, and a trapezoidal area with a width of 1.5m and a length of 3m is projected. Used to form a welcome light blanket. According to the camera's judgment on the distance between people and vehicles, the micro-lens array light type switching system is activated, and dynamically adjusts the area ratio of the projection unit that can emit light according to the distance between people and vehicles, so that the welcome light blanket is gradually shortened, and the length of the light blanket is kept in front of people's feet. About 0.1m distance, and always follow the pace of people, as shown in Figure 5.

The embodiment of the microlens array light type switching method of the present invention includes the following steps: (1) obtaining the distance L between the person and the vehicle in real time; (2) dynamically adjusting the projection light of the microlens array according to the change of the distance L between the person and the vehicle A type of coverage area, so that the light carpet projected on the ground via the microlens array is always located between people and vehicles.

In an embodiment of the light type switching method of the microlens array of the present invention, the length of the light carpet is suitable for continuous change.

In an embodiment of the microlens array light type switching method of the present invention, in the step (1), the face information of the person approaching the vehicle is also detected and compared with the pre-stored vehicle owner identity information. It is judged whether the person is the owner of the vehicle, and if it is the owner of the vehicle, proceed to step (2).

Specifically, as shown in FIG. 2, an embodiment of the microlens array light type switching method of the present invention includes the following steps: S101 determines whether the camera detects a person, if so, proceed to step S102, if not, repeat this step; S102 processes the portrait obtained by the camera, and extracts the face information from it; S103 judges whether the face information corresponds to the car owner, which can be determined by comparing with the pre-stored car owner face information database. If it is the car owner, continue Go to step S104, if it is not the car owner, then return to step S101, that is, no longer perform the following light type switching function, this function is customized for the car owner; S104 obtains the current distance between people and vehicles and the current angle of the drive module, and determines accordingly. The steering and rotation angle of the drive module, the driving module drives the shading part to rotate according to the steering and rotation angle. When the driving module selects a stepper motor, the current angle refers to the angular position of the rotation shaft of the stepper motor, and the distance between people and vehicles needs to be adjacent. The two detected values are used to determine the steering of the stepper motor, and the rotation angle of the stepper motor is determined according to the pre-stored correspondence table between the distance between the person and the vehicle and the rotation angle of the shading member; S105 judges whether the distance between the person and the vehicle reaches the preset upper limit or Lower limit value, if yes, end the current execution process, return to initial step S101 to loop, if not, return to step S104, follow the adjustment of the position of the shading component according to the constantly changing distance between people and vehicles, until the distance between people and vehicles Reach the preset upper limit or lower limit, where the lower limit corresponds to the closest distance between the person and the car, and if it is lower than the value, end step S105 and return to the initial step S101; the upper limit corresponds to the distance between the person and the car. If the distance is farther than this value, the step S105 is ended and the process returns to the initial step S101.

In an embodiment of the microlens array light type switching method of the present invention, the initial value of the person-vehicle distance L for the microlens array to start projection is 4m, and the corresponding initial length of the light carpet is 3m; when the person-vehicle distance L decreases When the distance is as small as 3m, the dynamic adjustment of the projected light pattern is activated. With the further reduction of the distance L between the person and the vehicle, the length of the light blanket is shortened, and the light blanket is always at a certain distance from the human foot.

In an embodiment of the method for switching the light type of the microlens array of the present invention, each row of the microlens array emits light, and from top to bottom, the projected light of each row covers a continuous distance on the ground from far to near, and the end to the end They are connected to each other and do not overlap with each other; the dynamic adjustment process of the projected light type is: blocking the projected light along the row direction of the microlens array by a light-shielding component, the light-shielding component is arranged on the top of the microlens array and is suitable for along the columns of the microlens array. The direction rotates around the micro-lens array, so that the light-emitting area on the micro-lens array that can be projected to the ground without obstruction changes continuously.

The human-vehicle distance detection module can be completed by ultrasonic radar. This detection method can be accurate to the centimeter level. As you said, the correspondence table can also be refined to the centimeter and millisecond level, that is, a person-vehicle distance value corresponds to a rotation angle. . The drive module can be completed by a stepper motor. The step value of the stepper motor corresponds to the rotation angle one by one. For example, if the distance between the person and the vehicle is 3 meters, the step is 100 steps, and the distance between the person and the vehicle is 2.5 meters, then the step is 90 steps. Therefore, whether it is close or far away, only the absolute value of the distance between the person and the vehicle is judged, that is, each change of the shading degree of the shading component is independent of the distance between the person and the vehicle, even if the distance jumps, it corresponds only to the jump in the rotation angle. As for the rotation speed, it is related to the parameters of the stepper motor, and it must be able to keep up with the moving speed of the person, for example, it can rotate 180 degrees in 0.5 seconds.

In the embodiments of the welcome light of the present invention, any embodiment of the microlens array light type switching system of the present invention can be included, and any embodiment of the microlens array light mode switching method of the present invention can be executed, and has the above-mentioned The technical effects or advantages of any embodiment will not be repeated here.

Embodiments of the vehicle of the present invention may include any of the above-mentioned embodiments of the welcome light of the present invention, and have the technical effects or advantages of any of the above-mentioned embodiments, which will not be repeated here.

The optional embodiments of the embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details of the above-mentioned embodiments. A variety of simple modifications are made to the technical solution of the invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction. To avoid unnecessary repetition, various possible combinations are not further described in this embodiment of the present invention.

In addition, various implementations of the embodiments of the present invention may also be combined arbitrarily, as long as they do not violate the ideas of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims (13)

1. A microlens array light type switching system is characterized by comprising a single microlens array and a light type switching device; the light pattern switching device is suitable for dynamically adjusting the coverage area of the projection light pattern of the micro-lens array according to the change of the distance between the pedestrians and the vehicles, so that the light blanket projected on the ground through the micro-lens array is always positioned between the pedestrians and the vehicles.

2. The microlens array light pattern switching system of claim 1, wherein the length of the light blanket is adapted to be continuously variable.

3. The micro-lens array light pattern switching system according to claim 1, wherein each row of the micro-lens array is in a light emitting state during the dynamic adjustment, the light pattern switching device is adapted to adjust the degree of opening and closing of the projection light to the micro-lens array in two directions through the two-way rotation of the light shielding part relative to the micro-lens array, and the light shielding part is adapted to move up and down in two directions along the column direction of the micro-lens array.

4. The micro-lens array light pattern switching system according to claim 1, wherein the light pattern switching device comprises a human-vehicle distance detection module, a vehicle-mounted controller, a switching controller, a driving module and a shading part; the human-vehicle distance detection module is suitable for detecting the distance between human vehicles in real time and transmitting the distance to the vehicle-mounted controller; the vehicle-mounted controller is suitable for storing the distance between two adjacent detected people and vehicles, determining steering according to the comparison result of the distance between the two detected people and vehicles, and transmitting the steering information to the switching controller; the switching controller is pre-stored with a corresponding relation table of the distance between the passenger car and the rotating angle of the shading part, obtains the corresponding rotating angle of the shading part from the corresponding relation table, and transmits the steering angle and the rotating angle to the driving module, so that the driving module drives the shading part to rotate according to the steering angle and the rotating angle, and the driving module is suitable for feeding back the rotating angle value of the shading part to the switching controller in real time.

5. The micro-lens array light pattern switching system according to claim 4, wherein the light pattern switching device further comprises an identification module, the identification module is pre-stored with car owner identification information and is adapted to determine whether a person approaching the vehicle is a car owner by detecting face information of the person and comparing the face information with the car owner identification information, and if the person is a car owner, an enable signal is sent to the switching controller to start the dynamic adjustment of the projected light pattern.

6. The light pattern switching system of claim 4 or 5, wherein the projected light of each row of projection units of the micro lens array covers a continuous distance from far to near on the ground, and the projected light is end to end and does not overlap each other.

7. A microlens array light type switching method is characterized by comprising the following steps:

(1) acquiring the distance L between a person and a vehicle in real time;

(2) the coverage area of the projected light pattern of the microlens array is dynamically adjusted according to the change of the distance L between the pedestrians and the vehicles, so that the light blanket projected on the ground through the microlens array is always positioned between the pedestrians and the vehicles.

8. The microlens array light pattern switching method according to claim 7, wherein the length of the light blanket is adapted to be continuously varied.

9. The method according to claim 7 or 8, wherein in the step (1), the face information of the person approaching the vehicle is detected and compared with the pre-stored owner identity information to determine whether the person is the owner of the vehicle, and if the person is the owner of the vehicle, the step (2) is executed.

10. The light pattern switching method of the micro-lens array according to claim 9, wherein the initial value of the distance L between the person and the vehicle for starting the projection of the micro-lens array is 4m, and the initial length of the corresponding light blanket is 3 m; when the human-vehicle distance L is reduced to 3m, the dynamic adjustment of the projection light type is started, the length of the light blanket is shortened along with the further reduction of the human-vehicle distance L, and the light blanket is always away from the human feet by a certain distance.

11. The method of claim 10, wherein each row of projection units of the microlens array emits light, and from top to bottom, the projection light of each row of projection units respectively covers a continuous distance from far to near on the ground, and the projection light is connected end to end and does not overlap each other;

the dynamic adjustment process of the projection light shape comprises the following steps: the light shielding part is arranged at the top of the micro lens array and is suitable for rotating around the micro lens array along the row direction of the micro lens array, so that the light emitting area projected to the ground can be continuously changed on the micro lens array without shielding.

12. A welcome lamp comprising the microlens array light pattern switching system as claimed in any one of claims 1 to 6, and adapted to perform the microlens array light pattern switching method as claimed in any one of claims 7 to 11 by the microlens array light pattern switching system.

13. A vehicle comprising the courtesy light of claim 12.

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