阅读说明：本技术 车内仪表背光亮度调节系统及方法、车内仪表及车辆 (Backlight brightness adjusting system and method for in-vehicle instrument, in-vehicle instrument and vehicle ) 是由 王磊 于 2021-08-30 设计创作，主要内容包括：本发明提供了一种车内仪表背光亮度调节系统及方法、车内仪表及车辆,涉及显示技术领域,该系统包括依次连接的光敏传感器、采样电路、控制器和背光驱动电路；光敏传感器用于获取经由导光件传递的实时外界光照度；采样电路用于将实时外界光照度转换为实时采样电压值；控制器用于获取与实时采样电压值对应的实时ADC值,并根据实时ADC值和预设的优化算法,输出对应的目标亮度百分比信号至背光驱动电路,从而通过背光驱动电路调节车内仪表的背光亮度。本发明用了较低成本的光敏传感器,加上优化算法的优化,实现了仪表全天多场景下的亮度无极变化,不会有明显的亮度突变,亮度变化会更加平滑,从而给驾驶员带来更好的驾车感受。(The invention provides a system and a method for adjusting backlight brightness of an in-vehicle instrument, the in-vehicle instrument and a vehicle, and relates to the technical field of display, wherein the system comprises a photosensitive sensor, a sampling circuit, a controller and a backlight driving circuit which are sequentially connected; the photosensitive sensor is used for acquiring real-time ambient light illumination transmitted by the light guide piece; the sampling circuit is used for converting the real-time ambient illuminance into a real-time sampling voltage value; the controller is used for acquiring a real-time ADC value corresponding to the real-time sampling voltage value, and outputting a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm, so that the backlight brightness of the instrument in the vehicle is adjusted through the backlight driving circuit. The invention uses the photosensitive sensor with lower cost and optimizes the optimization algorithm, realizes the stepless brightness change of the instrument under multiple scenes all day long, has no obvious brightness mutation, and has smoother brightness change, thereby bringing better driving feeling to drivers.)

1. A backlight brightness adjusting system for an instrument in a vehicle is characterized by comprising a photosensitive sensor, a sampling circuit, a controller and a backlight driving circuit which are sequentially connected;

the photosensitive sensor is arranged at a light outlet of a light guide part on an instrument in the vehicle and is used for acquiring real-time outside illuminance transmitted by the light guide part;

the sampling circuit is used for converting the real-time ambient illuminance into a real-time sampling voltage value and sending the real-time sampling voltage value to the controller;

the controller is used for acquiring a real-time ADC value corresponding to the real-time sampling voltage value and outputting a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm;

the backlight driving circuit is used for adjusting the backlight brightness of the in-vehicle instrument according to the target brightness percentage signal.

2. The system according to claim 1, wherein the controller is specifically configured to perform analog-to-digital conversion on the real-time sampled voltage value to obtain a real-time ADC value; optimizing the real-time ADC value according to the optimization algorithm to obtain an optimized real-time ADC value; determining a target brightness percentage signal corresponding to the optimized real-time ADC value according to a preset corresponding relation between the ADC value and the brightness percentage, and outputting the target brightness percentage signal to the backlight driving circuit;

the corresponding relation between the ADC value and the brightness percentage is obtained according to the actually measured ADC value, the optimization algorithm, the backlight brightness value formulated under the corresponding external illumination and the corresponding relation between the backlight brightness value and the brightness percentage.

3. The in-vehicle instrument backlight brightness adjustment system according to claim 1 or 2, wherein the optimization algorithm includes any one of: a clipping filtering method, a median filtering method, an arithmetic mean filtering method, a recursive mean filtering method, a median mean filtering method, a clipping mean filtering method, a first-order lag filtering method, a weighted recursive mean filtering method, an anti-jitter filtering method, a clipping anti-jitter filtering method.

4. The system of claim 1, wherein the controller communicates with the backlight driver circuit via an SPI protocol.

5. The system of claim 1, wherein the type of the photosensitive sensor comprises TEMD6010, SFH5711-2/3-Z, or PTSMD 026.

6. The in-vehicle instrument backlight brightness adjustment system according to claim 1, wherein the target brightness percentage signal is a pulse width modulation signal.

7. An in-vehicle instrument backlight brightness adjusting method applied to the in-vehicle instrument backlight brightness adjusting system according to any one of claims 1 to 6, the in-vehicle instrument backlight brightness adjusting method comprising:

the method comprises the steps that a photosensitive sensor obtains real-time outside illuminance transmitted by a light guide piece on an instrument in the vehicle;

the sampling circuit converts the real-time ambient illuminance into a real-time sampling voltage value and sends the real-time sampling voltage value to the controller;

the controller acquires a real-time ADC value corresponding to the real-time sampling voltage value, and outputs a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm;

and the backlight driving circuit adjusts the backlight brightness of the instrument in the vehicle according to the target brightness percentage signal.

8. The method for adjusting backlight brightness of an instrument in a vehicle according to claim 7, wherein the step of outputting a corresponding target brightness percentage signal to a backlight driving circuit according to the real-time ADC value and a preset optimization algorithm comprises:

optimizing the real-time ADC value according to the optimization algorithm to obtain an optimized real-time ADC value;

determining a target brightness percentage signal corresponding to the optimized real-time ADC value according to a preset corresponding relation between the ADC value and the brightness percentage, and outputting the target brightness percentage signal to the backlight driving circuit; the corresponding relation between the ADC value and the brightness percentage is obtained according to the actually measured ADC value, the optimization algorithm, the backlight brightness value formulated under the corresponding external illumination and the corresponding relation between the backlight brightness value and the brightness percentage.

9. An in-vehicle instrument comprising the in-vehicle instrument backlight luminance adjusting system according to any one of claims 1 to 6.

10. A vehicle characterized by comprising the in-vehicle instrument of claim 9.

Technical Field

The invention relates to the technical field of display, in particular to a backlight brightness adjusting system and method for an in-vehicle instrument, the in-vehicle instrument and a vehicle.

Background

The screen brightness of the instrument in the vehicle required by human eyes is different along with different environment brightness, the screen brightness needs to be increased under bright environment light, and the screen brightness needs to be reduced under dark and weak environment light.

In the prior art, the backlight brightness of the vehicle interior instrument is generally adjusted by the following method: the method comprises the steps of taking an instrument main control MCU (micro control Unit) as a core Unit, obtaining external illumination, vehicle speed and calendar signals, and dynamically adjusting the brightness of backlight according to different time, vehicle speed and illumination scenes.

The backlight brightness adjusting method for the instrument in the vehicle has the following defects: only 3 illumination scenes in the daytime, at dusk and at night are divided, and only three-section backlight adjustment can be realized, so that the brightness change is not smooth, and bad driving experience and feeling are easily brought to a driver.

Disclosure of Invention

The invention aims to provide a system and a method for adjusting backlight brightness of an in-vehicle instrument, the in-vehicle instrument and a vehicle, so that the backlight brightness of the in-vehicle instrument is infinitely changed in multiple scenes all day around, and a more comfortable in-vehicle driving environment and driving feeling are created.

In a first aspect, an embodiment of the present invention provides an in-vehicle instrument backlight brightness adjustment system, which includes a photosensitive sensor, a sampling circuit, a controller, and a backlight driving circuit, which are connected in sequence;

the photosensitive sensor is arranged at a light outlet of a light guide part on an instrument in the vehicle and is used for acquiring real-time outside illuminance transmitted by the light guide part;

the sampling circuit is used for converting the real-time ambient illuminance into a real-time sampling voltage value and sending the real-time sampling voltage value to the controller;

the controller is used for acquiring a real-time ADC (analog-to-digital conversion) value corresponding to the real-time sampling voltage value, and outputting a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm;

the backlight driving circuit is used for adjusting the backlight brightness of the in-vehicle instrument according to the target brightness percentage signal.

Further, the controller is specifically configured to perform analog-to-digital conversion on the real-time sampling voltage value to obtain a real-time ADC value; optimizing the real-time ADC value according to the optimization algorithm to obtain an optimized real-time ADC value; determining a target brightness percentage signal corresponding to the optimized real-time ADC value according to a preset corresponding relation between the ADC value and the brightness percentage, and outputting the target brightness percentage signal to the backlight driving circuit;

the corresponding relation between the ADC value and the brightness percentage is obtained according to the actually measured ADC value, the optimization algorithm, the backlight brightness value formulated under the corresponding external illumination and the corresponding relation between the backlight brightness value and the brightness percentage.

Further, the optimization algorithm comprises any one of: a clipping filtering method, a median filtering method, an arithmetic mean filtering method, a recursive mean filtering method, a median mean filtering method, a clipping mean filtering method, a first-order lag filtering method, a weighted recursive mean filtering method, an anti-jitter filtering method, a clipping anti-jitter filtering method.

Further, the controller communicates with the backlight driving circuit through an SPI protocol.

Further, the types of the photosensitive sensors include TEMD6010, SFH5711-2/3-Z, or PTSMD 026.

Further, the target brightness percentage signal is a pulse width modulation signal.

In a second aspect, an embodiment of the present invention further provides an in-vehicle instrument backlight brightness adjusting method, which is applied to the in-vehicle instrument backlight brightness adjusting system in the first aspect, and the in-vehicle instrument backlight brightness adjusting method includes:

the method comprises the steps that a photosensitive sensor obtains real-time outside illuminance transmitted by a light guide piece on an instrument in the vehicle;

the sampling circuit converts the real-time ambient illuminance into a real-time sampling voltage value and sends the real-time sampling voltage value to the controller;

the controller acquires a real-time ADC value corresponding to the real-time sampling voltage value, and outputs a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm;

and the backlight driving circuit adjusts the backlight brightness of the instrument in the vehicle according to the target brightness percentage signal.

Further, the step of outputting the corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm includes:

optimizing the real-time ADC value according to the optimization algorithm to obtain an optimized real-time ADC value;

determining a target brightness percentage signal corresponding to the optimized real-time ADC value according to a preset corresponding relation between the ADC value and the brightness percentage, and outputting the target brightness percentage signal to the backlight driving circuit; the corresponding relation between the ADC value and the brightness percentage is obtained according to the actually measured ADC value, the optimization algorithm, the backlight brightness value formulated under the corresponding external illumination and the corresponding relation between the backlight brightness value and the brightness percentage.

In a third aspect, an embodiment of the present invention further provides an in-vehicle instrument, including the in-vehicle instrument backlight brightness adjustment system in the first aspect.

In a fourth aspect, the embodiment of the present invention further provides a vehicle, including the in-vehicle instrument in the third aspect.

In the system and the method for adjusting the backlight brightness of the in-vehicle instrument, the in-vehicle instrument and the vehicle provided by the embodiment of the invention, the system comprises a photosensitive sensor, a sampling circuit, a controller and a backlight driving circuit which are sequentially connected; the photosensitive sensor is arranged at a light outlet of a light guide part on the instrument in the vehicle and used for acquiring real-time outside illuminance transmitted by the light guide part; the sampling circuit is used for converting the real-time ambient illuminance into a real-time sampling voltage value and sending the real-time sampling voltage value to the controller; the controller is used for acquiring a real-time ADC value corresponding to the real-time sampling voltage value and outputting a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm; the backlight driving circuit is used for adjusting the backlight brightness of the instrument in the vehicle according to the target brightness percentage signal. The system and the method for adjusting the backlight brightness of the in-vehicle instrument, the in-vehicle instrument and the vehicle provided by the embodiment of the invention use the photosensitive sensor with lower cost and optimize the optimization algorithm, thereby realizing the stepless brightness change of the instrument under multiple scenes all day.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a backlight brightness adjustment system for an in-vehicle instrument according to an embodiment of the present invention;

fig. 2 is a logic diagram of a photosensitive sensor for acquiring real-time ambient light according to an embodiment of the present invention;

fig. 3 is a circuit diagram of a backlight lamp of an in-vehicle instrument according to an embodiment of the present invention;

fig. 4 is a graph of theoretical variation of photocurrent of a photosensor in the backlight brightness adjustment system of the vehicle instrument according to the embodiment of the present invention along with external illuminance;

fig. 5 is a graph illustrating a theoretical variation of an ADC value obtained by a controller in an in-vehicle instrument backlight brightness adjustment system according to an embodiment of the present invention along with an external illuminance;

fig. 6 is a graph showing measured variation of an ADC value obtained by a controller in an in-vehicle instrument backlight brightness adjustment system according to an embodiment of the present invention along with external illuminance;

fig. 7 is a schematic flow chart of a method for adjusting backlight brightness of an in-vehicle instrument according to an embodiment of the present invention.

Icon: 101-a photosensitive sensor; 102-a sampling circuit; 103-a controller; 104-backlight driving circuit.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the regulation of instrument backlight brightness in the car, adopt the syllogic regulation of being shaded usually among the prior art, luminance change is unsmooth, brings not good driving experience and impression for the driver easily. Based on this, the in-vehicle instrument backlight brightness adjusting system and method, the in-vehicle instrument and the vehicle provided by the embodiment of the invention can realize that the in-vehicle instrument backlight brightness does not change in multiple scenes all day long, and more comfortable in-vehicle driving environment and driving feeling are created.

In order to facilitate understanding of the embodiment, a detailed description will be given to an in-vehicle instrument backlight brightness adjusting system disclosed in the embodiment of the present invention.

The embodiment of the invention provides a backlight brightness adjusting system for an instrument in a vehicle, which is shown in a schematic structural diagram of the backlight brightness adjusting system for the instrument in the vehicle shown in fig. 1, and the system comprises a photosensitive sensor 101, a sampling circuit 102, a controller 103 and a backlight driving circuit 104 which are connected in sequence.

Specifically, the photosensitive sensor 101 is arranged at a light outlet of a light guide member on the vehicle instrument, and the photosensitive sensor 101 is used for acquiring real-time outside illuminance transmitted by the light guide member; the sampling circuit 102 is configured to convert the real-time ambient illuminance into a real-time sampling voltage value, and send the real-time sampling voltage value to the controller 103; the controller 103 is configured to obtain a real-time ADC value corresponding to the real-time sampling voltage value, and output a corresponding target brightness percentage signal to the backlight driving circuit 104 according to the real-time ADC value and a preset optimization algorithm; the backlight driving circuit 104 is used for adjusting the backlight brightness of the vehicle instrument according to the target brightness percentage signal. By applying the system, the instrument in the vehicle can perform self-adaptive brightness adjustment in multiple scenes.

The light guide member can be a light guide column, and referring to a logic schematic diagram that a photosensitive sensor shown in fig. 2 acquires real-time external illuminance, the external illuminance can be irradiated on an instrument panel of an instrument in a vehicle through a front cover of the vehicle, and is refracted to a light inlet of the light guide column through the instrument panel, and then is transmitted to the photosensitive sensor 101 through the light guide column. Therefore, the photosensitive sensor 101 can sense real-time ambient illuminance, and the sensed illuminance range is large, thereby realizing the acquisition of illuminance Lux (Lux).

Alternatively, the model of the photosensitive sensor 101 may include TEMD6010, SFH5711-2/3-Z, or PTSMD 026.

After the photosensitive sensor 101 senses the external illuminance Lux, a sampling voltage value is formed in the sampling circuit 102; the sampling voltage value converted by the sampling circuit 102 is acquired by the ADC by the controller 103 to obtain a corresponding ADC value.

Optionally, the controller 103 may perform analog-to-digital conversion on the real-time sampling voltage value to obtain a real-time ADC value; then, optimizing the real-time ADC value according to an optimization algorithm to obtain an optimized real-time ADC value; finally, according to the preset corresponding relationship between the ADC value and the brightness percentage, determining a target brightness percentage signal corresponding to the optimized real-time ADC value, and outputting the target brightness percentage signal to the backlight driving circuit 104; the corresponding relation between the ADC value and the brightness percentage is obtained according to the actual measurement ADC value, the optimization algorithm, the backlight brightness value formulated under the corresponding external illumination and the corresponding relation between the backlight brightness value and the brightness percentage.

In the embodiment, the real vehicle effect is verified on the whole vehicle, and multiple rounds of data optimization and optimization algorithm adjustment are performed according to real application and real vehicle effect recording data, so that the screen brightness of the instrument in the vehicle can change smoothly in multiple scenes all day, instead of gradual change of brightness, and stepless change of backlight brightness is realized. Specifically, after algorithm optimization is performed on the software according to the measured data (ADC value), a reasonable screen brightness change interval and backlight brightness value are worked out, so as to obtain a corresponding relationship between the ADC value and the brightness percentage, and the controller 103 may output a suitable brightness percentage according to the real-time ADC value to adjust the backlight brightness of the in-vehicle instrument.

Optionally, the optimization algorithm may include any one of the following: a clipping filtering method, a median filtering method, an arithmetic mean filtering method, a recursive mean filtering method, a median mean filtering method, a clipping mean filtering method, a first-order lag filtering method, a weighted recursive mean filtering method, an anti-jitter filtering method, a clipping anti-jitter filtering method.

Taking an arithmetic mean filtering method as an example, in a possible implementation manner, the controller 103 takes an ADC value every 5ms and puts the ADC value into the ADC array, the length of the ADC array may be 9, the system may wait for the ADC array to be full after being turned on and then calculate an average value of the whole ADC array, and further perform backlight brightness adjustment for the first time based on the average value, and then calculate an average value every time an ADC value is read, so that the optimized ADC value is an average value of the currently obtained ADC value and the ADC values obtained in the previous 8 times.

The controller 103 may be an MCU, and the MCU performs software algorithm optimization according to the acquired real-time ADC value, performs final determination according to the analysis result of the data, and outputs a reasonable target brightness percentage signal under the real-time ambient light level. As shown in fig. 1, the target brightness percentage signal may be a PWM (Pulse width modulation) signal.

The backlight driving circuit 104 may be a light-emitting diode (LED) driving circuit. The backlight driving circuit 104 adjusts the backlight of the vehicle interior instruments in real time according to the target brightness percentage signal input by the controller 103, and simultaneously interacts with the controller 103 in real time. Alternatively, as shown in fig. 1, the backlight driving circuit 104 may interactively communicate with the controller 103 through an SPI (Serial Peripheral Interface) protocol.

The output of the backlight driving circuit 104 is connected to a backlight circuit of an in-vehicle instrument, as shown in fig. 3, the backlight circuit of an in-vehicle instrument may include a plurality of parallel light sets, each light set may include a plurality of LED lights connected in series, each light set is controlled by a switch, and the number of LED lights in different light sets may be the same or different; the backlight driving circuit 104 may implement backlight brightness adjustment of the in-vehicle instrument by changing one or more of an input current, an input voltage, and the number of closed switches of the backlight circuit.

The backlight brightness adjusting system of the instrument in the vehicle provided by the embodiment of the invention uses the photosensitive sensor with lower cost and the optimization of the optimization algorithm, realizes the stepless brightness change of the instrument in multiple scenes all day, and compared with three-section backlight adjustment, the backlight brightness adjusting system does not have obvious brightness mutation and has smoother brightness change, thereby bringing better driving feeling to a driver.

The stability of the above described in-vehicle instrument backlight brightness adjustment system in data acquisition will be described with reference to fig. 4 to 6 and table 1.

Referring to a theoretical variation curve of the photocurrent of the photosensitive sensor with the external illuminance in the backlight brightness adjustment system for the in-vehicle instrument shown in fig. 4, and a theoretical variation curve of the ADC value obtained by the controller with the external illuminance in the backlight brightness adjustment system for the in-vehicle instrument shown in fig. 5, as the external illuminance increases, theoretically, the photocurrent of the photosensitive sensor linearly increases, and the ADC value increases first and then becomes smooth. Referring to fig. 6, as compared with fig. 5, a graph of actually measured changes of the ADC value obtained by the controller along with the ambient light illuminance in the backlight brightness adjustment system for the vehicle instrument shows, it can be seen that the actual data has a certain deviation and fluctuation compared with the theoretical analysis data, but the overall linearity is consistent, and there is no obvious abnormal trip point.

Table 1 below shows measured ADC values of the backlight brightness adjusting systems (corresponding to serial numbers 1, 2, 3, and 4, respectively) of the instruments in 4 cars under different illumination levels.

TABLE 1

As can be seen from table 1, under the same illuminance environment, the acquired ADC value is relatively stable, thereby verifying the stability of the backlight brightness adjustment system of the vehicle instrument in data acquisition.

The embodiment of the present invention further provides an in-vehicle instrument backlight brightness adjusting method, which is applied to the in-vehicle instrument backlight brightness adjusting system, and refer to a flow diagram of an in-vehicle instrument backlight brightness adjusting method shown in fig. 7, where the method includes the following steps:

in step S702, the light sensor obtains the real-time ambient illuminance transmitted through the light guide on the vehicle instrument.

In step S704, the sampling circuit converts the real-time ambient illuminance into a real-time sampling voltage value, and sends the real-time sampling voltage value to the controller.

In step S706, the controller obtains a real-time ADC value corresponding to the real-time sampling voltage value, and outputs a corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and a preset optimization algorithm.

In step S708, the backlight driving circuit adjusts the backlight brightness of the vehicle interior instrument according to the target brightness percentage signal.

In some possible embodiments, the outputting of the corresponding target brightness percentage signal to the backlight driving circuit according to the real-time ADC value and the preset optimization algorithm in step S706 may be implemented by: optimizing the real-time ADC value according to an optimization algorithm to obtain an optimized real-time ADC value; determining a target brightness percentage signal corresponding to the optimized real-time ADC value according to a preset corresponding relation between the ADC value and the brightness percentage, and outputting the target brightness percentage signal to a backlight driving circuit; the corresponding relation between the ADC value and the brightness percentage is obtained according to the actual measurement ADC value, the optimization algorithm, the backlight brightness value formulated under the corresponding external illumination and the corresponding relation between the backlight brightness value and the brightness percentage.

The implementation principle and the generated technical effect of the method for adjusting the backlight brightness of the vehicle interior instrument provided by the embodiment are the same as those of the embodiment of the system for adjusting the backlight brightness of the vehicle interior instrument.

The embodiment of the invention also provides the in-vehicle instrument, which comprises the in-vehicle instrument backlight brightness adjusting system.

The embodiment of the invention also provides a vehicle which comprises the in-vehicle instrument.

The implementation principle and the generated technical effect of the in-vehicle instrument and the vehicle provided by the embodiment are the same as those of the in-vehicle instrument backlight brightness adjusting system embodiment, and for brief description, reference may be made to corresponding contents in the in-vehicle instrument backlight brightness adjusting system embodiment where no part of the in-vehicle instrument and the vehicle embodiment is mentioned.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.