Disclosure of Invention
The invention aims to provide a virtual reality equipment interaction method and device based on radio frequency identification (Radio Frequency Identification, RFID) and electronic equipment, so as to solve the technical problem of low flexibility of virtual reality interaction.
In a first aspect, the present application provides an interaction method of a virtual reality device based on RFID, where an entity user interface is formed by using RFID tags as entity anchors in an entity space, each RFID tag corresponds to an identifier, and each RFID tag correspondingly stores interaction operation data for the virtual space through the identifier, where the method includes:
Responding to the fact that at least one target RFID tag enters a designated reading range of an RFID card reader, wherein the RFID card reader reads a target identifier, and an RFID server corresponding to the RFID card reader acquires target interactive operation data corresponding to the target RFID tag through the target identifier, wherein the target identifier is an identifier corresponding to the target RFID tag;
The virtual reality device acquires the target interactive operation data from the RFID server, analyzes the target interactive operation data and obtains analyzed data;
and the virtual reality equipment triggers and executes interface interaction operation in a target virtual space corresponding to the virtual reality equipment based on the analyzed data.
In one possible implementation, the RFID tag is disposed on a physical entity object that serves as the entity user interface;
the physical entity object comprises at least one of the following:
physical entity environment, physical entity object, and human body part.
In one possible implementation, the identifier is an electronic product code (Electronic Product Code, EPC), the interaction operation data corresponding to each of the different RFID tags is distinguished by the EPC, and the RFID server corresponding to the RFID reader obtains, through the target identifier, target interaction operation data stored corresponding to the target RFID tag, including:
And the RFID server corresponding to the RFID card reader searches the target interactive operation data correspondingly stored in a database or a data file through the EPC, and sends the target interactive operation data to the virtual reality equipment through network communication.
In one possible implementation, before the RFID server corresponding to the RFID reader obtains the target interaction operation data stored corresponding to the target RFID tag through the target identifier, the method further includes:
Responding to the editing operation aiming at the RFID tag, customizing the EPC corresponding to the RFID tag according to the editing operation, and customizing the interactive operation data according to the editing operation, wherein the interactive operation data is the interactive operation data correspondingly stored by the RFID tag in the RFID server through the EPC.
In one possible implementation, the RFID server is disposed on the virtual reality device, and the virtual reality device obtains the target interaction data from the RFID server, including:
the virtual reality device directly acquires the target interactive operation data from the RFID server arranged at the virtual reality device.
In one possible implementation, the interoperation data includes at least one of:
Key input data, coordinate values converted into the virtual space, a 3-dimensional (3D) preform, and operation-related data loaded in real time by a virtual asset.
In one possible implementation, before the RFID reader reads the target identification in response to the at least one target RFID tag entering the specified read range of the RFID reader, the method further includes:
And responding to an adjustment operation of a target specified read range corresponding to a target RFID card reader, and adjusting the target specified read range according to the adjustment operation, wherein the target specified read range influences the action amplitude and the action precision of the interaction action corresponding to the entity user interface.
In a second aspect, the present application provides an RFID-based virtual reality device interaction apparatus, where an entity user interface is formed by using RFID tags as entity anchors in an entity space, each RFID tag corresponds to an identifier, and each RFID tag correspondingly stores interaction operation data for the virtual space through the identifier, where the apparatus includes:
The system comprises an acquisition module, a target RFID reader, an RFID server and a storage module, wherein the acquisition module is used for responding to the fact that at least one target RFID label enters a designated reading range of the RFID reader, the RFID reader reads a target identifier, and the RFID server corresponding to the RFID reader acquires target interactive operation data stored corresponding to the target RFID label through the target identifier;
The analysis module is used for acquiring the target interactive operation data from the RFID server by the virtual reality equipment, analyzing the target interactive operation data and obtaining analyzed data;
and the execution module is used for triggering and executing interface interaction operation in a target virtual space corresponding to the virtual reality equipment based on the analyzed data by the virtual reality equipment.
In a third aspect, the present application further provides an electronic device comprising a memory, a processor, the memory storing a computer program executable on the processor, the processor implementing the method of the first or second aspect when executing the computer program.
In a fourth aspect, the present application further provides a computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to perform the method of the first or second aspect described above.
The application has the following beneficial effects:
According to the RFID-based virtual reality equipment interaction method, device and electronic equipment provided by the application, an entity user interface is formed through the RFID tags serving as entity anchors in an entity space, each RFID tag corresponds to one identifier, each RFID tag correspondingly stores interaction operation data aiming at the virtual space through the identifier, the method can respond to the fact that at least one target RFID tag enters a designated reading range of an RFID card reader, the RFID card reader reads the target identifier, an RFID server corresponding to the RFID card reader acquires target interaction operation data corresponding to the target RFID tag through the target identifier, wherein the target identifier is an identifier corresponding to the target RFID tag, the virtual reality equipment acquires the target interaction operation data from the RFID server, analyzes the target interaction operation data, triggers and executes interface interaction operation in a target virtual space corresponding to the virtual reality equipment, and in the scheme, the target reader reads the target identifier when the target RFID tag enters the designated reading range of the RFID, the target RFID card reader acquires the target identifier through the target identifier, the target identifier is a VR corresponding to enable the target interaction operation data to be directly distributed and interacted with the RFID card reader to be distributed in a real-world interaction environment by a virtual reality equipment, and the virtual reality equipment is enabled to be interacted with a virtual reality environment, and the virtual reality equipment is enabled to be distributed to be interacted with a corresponding to a virtual reality user interface, and a virtual reality system is enabled to be capable of being directly and dynamically interacted with a virtual user interface, and a virtual user interface is enabled to be triggered and a virtual user interface, and a virtual interaction system is enabled to be configured to be interacted with a virtual interface, the virtual reality interaction method has the advantages that the physical objects such as articles, animals and human bodies interact, flexible interaction combining virtual reality and real reality is achieved, flexibility and expandability of virtual reality interaction are improved, a user can conveniently achieve flexible interaction of the physical objects in virtual reality and the real world, and the technical problem that the flexibility of virtual reality interaction is low is solved.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "comprising" and "having" and any variations thereof, as used in the embodiments of the present application, are intended to cover non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or apparatus.
At present, interaction modes such as handles and facial recognition cannot be directly interacted with physical entities in the real world, such as environments, articles, animals, human bodies and the like, so that the flexibility of the conventional virtual reality interaction is low. Moreover, when the physical world and the virtual space are interacted by using the current mode, the interaction flexibility, the feedback speed, the operation precision (and the construction cost) and the like are often insufficient, and the rapid, real-time and accurate interaction experience is difficult to provide.
Based on the above, the embodiment of the application provides a virtual reality equipment interaction method and device based on RFID and electronic equipment.
Embodiments of the present invention are further described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of an interaction method of virtual reality equipment based on RFID according to an embodiment of the present application. An entity user interface (tangible user interface, TUI) is formed by RFID tags serving as entity anchors in the entity space, each RFID tag corresponds to an identifier, and each RFID tag correspondingly stores interactive operation data aiming at the virtual space through the identifier. As shown in fig. 1, the method includes:
Step S110, in response to at least one target RFID tag entering a designated reading range of an RFID reader, the RFID reader reads the target identifier, and the RFID server corresponding to the RFID reader acquires target interaction operation data corresponding to the target RFID tag and stored by the target identifier.
The target identifier is an identifier corresponding to the target RFID tag. As a possible implementation manner, before using the virtual reality device, each RFID tag stores associated interaction data in a data file (including but not limited to csv, XML file, etc.) or a database (including but not limited to SQL, access, etc.) at the server side, where different fields in the database or the data file are used to store different interaction data. For example, different data entries in a database or data file may be distinguished by the EPC identification of the RFID, i.e., an RFID tag may correspond to a data record containing one or more interoperation definitions.
The above-mentioned interactive operation data may cover all interactive objects and interactive operations, and the method provided by the embodiment of the present application may be applied as long as the interactive operations can be simplified into a switching (i.e. only two states, trigger on or off) or a continuous switching operation. In practical applications, the operation and most of the available interaction methods for the virtual asset in the virtual reality can be implemented, for example, the corresponding RFID tag can be scanned to change the moving position and moving direction of the camera in the virtual reality, or a section of text content is triggered to be displayed or to give out an audio effect.
In an alternative embodiment, the interactive operation data includes at least one of key input data, coordinate values converted into a virtual space, 3D preforms, and operation-related data loaded in real time by the virtual asset. Through the various aspects of the interactive operation data, the interactive operation data is more comprehensive and accurate.
In the embodiment of the application, the RFID is expanded into an entity user interface supporting user operation, and the entity user interface is used for combining with various physical entities such as environment, objects, animals and human bodies to realize a novel interaction means based on the physical world and virtual reality content interaction of the RFID tag.
As an alternative embodiment, the RFID tag is disposed on a physical object that serves as a physical user interface, the physical object including at least one of a physical environment, a physical object, a human wearable entity clothing, and a human body part.
For example, the associated RFID tag is attached to a physical entity surface that serves as a physical interaction interface (entity user interface), including, but not limited to, an object, a physical space, a clothing surface worn by a person, and the like. And determining the number of the RFID tags to be attached and the attachment positions according to the expected interaction effect to be achieved.
As one example, as shown in fig. 2, an RFID tag is combined with a physical entity exhibit, and a user obtains relevant VR multimedia content through a handheld RFID card reader device. For example, a piece of physical entity exhibit may have an RFID tag attached, which may be used to trigger dynamic loading of VR multimedia content associated with the exhibit.
As another example, as shown in fig. 3, an RFID tag is incorporated with a user's clothing into a wearable physical interactive interface (physical user interface) that manipulates game objects within a VR game by moving hand positions. For example, a left sleeve and a right sleeve of a piece of clothing may each have an RFID tag attached thereto, and both tags may be associated with key inputs associated with the left hand or right hand of the person wearing the clothing, respectively.
The RFID tag is used as an entity anchor point of the physical world and is attached to surfaces including but not limited to physical environments, entity objects, clothes worn by human bodies and the like, so that an interactive entity user interface is formed, and effective association of the physical entity interface and a virtual space is realized. Moreover, the user can interact with physical entities in the real world, such as environment, articles, animals, human bodies and the like, so that the flexibility and expandability of virtual reality interaction are improved.
In the step, the RFID end reads the unique identification of the tag, associates and stores data, and transmits the data to the VR end through the UDP network. Illustratively, when using a virtual reality device, the RFID tag enters a reader reading range, causing the server to obtain the EPC identification of the RFID tag. The RFID server can operate on a computer or a hardware platform, and the RFID card reader can communicate with the server through a connection mode including but not limited to a serial port, WIFI or Bluetooth. The manner in which the RFID tag enters the reader is not fixed depending on the type, arrangement, and whether the RFID reader is provided with portability. For example, the interaction may be triggered by a user wearing a VR head display while using a handheld device loaded with an RFID card reading module to read hidden RFID tags in the surrounding environment, furniture or article, or by moving an object to which RFID tags are attached, such as clothing to which RFID tags are attached at sleeves worn by the user, setting the card reader at a suitable distance such that a head-up tag enters the reading range of the card reader when the head-up tag is in the hand, thereby triggering a related operation in the VR. The RFID card reader can read a plurality of labels at one time, so that the RFID card reader can be used for triggering various interactive operations simultaneously, such as interaction associated with the RFID labels at the left hand and the right hand can be triggered simultaneously when a user lifts two hands.
In an optional embodiment, the identifier may be an electronic product code (Electronic Product Code, EPC), and the interactive operation data corresponding to different RFID tags are distinguished by the EPC, and the RFID server corresponding to the RFID reader obtains the target interactive operation data stored corresponding to the target RFID tag through the target identifier, which specifically includes the following steps:
And the RFID server corresponding to the RFID card reader searches the target interactive operation data correspondingly stored in the database or the data file through the EPC, and sends the target interactive operation data to the virtual reality equipment through network communication.
As shown in fig. 4, the RFID server searches a database or a corresponding data record in a data file through EPC codes, and sends the data to the VR application using network communication (including, but not limited to, user datagram protocol UDP, webSocket, etc.).
In practical applications, the RFID server may communicate with the VR device via network communication, and may be deployed via a distributed computing architecture (distributed computing), i.e., the VR display device may be integrated with the VR display device, and the server may be an independent workstation computer or a microcomputer such as a raspberry group. The conditions only require that the RFID server and VR device be able to communicate over a network. For example, the handheld RFID card reader module and the server may be located on the same mobile device in the android system as in FIG. 2, the RFID server communicates with the head-mounted VR device via a local area network, and the fixed RFID card reader and RFID server (raspberry group or small computer) as in FIG. 3 communicate with the VR head-mounted device via a USB serial port connection (both hidden in the box) to exchange data via network communications. This is a two-way typical distributed computing architecture deployment that meets different interaction scenarios and mobility (mobility) requirements.
By using the EPCs of the RFID tags as unique identifications of each RFID tag in the database, users can define the EPCs through RFID writing operation, including but not limited to key input, coordinate values in a conversion virtual reality space, real-time loading of virtual assets such as 3D prefabricated members (Prefab) and audio and video, and the like, so that virtual-real interaction links combined with virtual reality feedback through physical entity triggering of the RFID tags are constructed.
In step S120, the virtual reality device obtains the target interactive operation data from the RFID server, and parses the target interactive operation data to obtain parsed data.
As shown in fig. 4, the VR application communicates through a network, receives the target interaction data sent by the RFID terminal, and then the VR application parses the extension data associated with the RFID, and triggers corresponding interaction in the virtual environment according to the parsed data.
As another alternative, deploying the RFID server on the same device as the VR device may also be implemented. The virtual reality device obtains target interactive operation data from the RFID server, wherein the virtual reality device directly obtains the target interactive operation data from the RFID server arranged at the virtual reality device.
In practical application, the distributed RFID server can be integrated to the VR application end, such as an extended RFID module for a mobile phone combined with a paper box type VR head display, so that VR combined with RFID integrated deployment is realized. By the method, delay caused by network communication can be reduced or eliminated, and the real-time performance of VR interaction is further improved.
Step S130, the virtual reality device triggers and executes interface interaction operation in a target virtual space corresponding to the virtual reality device based on the analyzed data.
In one possible implementation, as shown in fig. 4, the VR application triggers and executes related interaction operations in the VR environment according to the parsed data.
According to the embodiment of the application, the RFID reader reads the target identification when the target RFID tag enters the appointed reading range of the RFID reader, the RFID server acquires the target interactive operation data stored by the target RFID tag corresponding to the target RFID tag through the target identification, and then transmits the target interactive operation data to the VR equipment so as to enable the VR equipment to analyze the target interactive operation data and trigger corresponding interaction in the virtual environment, thereby realizing the virtual equipment entity interface interaction based on the trigger of the passive RFID tag, realizing dynamic interaction through a distributed deployment mechanism of the RFID end and the VR end, constructing a high-speed and flexible distributed collaboration system, and realizing flexible interaction of virtual reality and entity objects in the real world by using the RFID as an entity user interface in an interaction mode for enhancing the virtual reality.
As another alternative implementation manner, the RFID in the above scheme mainly refers to passive ultra-high frequency RFID, and the RFID may be replaced by passive medium-frequency RFID, low-frequency RFID or NFC, which is mainly different in length of the tag reading range, but the essence of the technical idea is the same.
In some embodiments, before the RFID server corresponding to the RFID reader obtains the target interaction operation data stored corresponding to the target RFID tag through the target identifier, the method may further include the following steps:
responding to the editing operation aiming at the RFID tag, customizing an EPC corresponding to the RFID tag according to the editing operation, and customizing interactive operation data according to the editing operation, wherein the interactive operation data is the interactive operation data which is correspondingly stored in an RFID server by the RFID tag through the EPC.
As shown in FIG. 4, different fields in the database or data file are used to store different interoperation information, and a user may customize more fields by editing the database or data file. In the embodiment of the application, the RFID can be expanded into an entity interface supporting user-defined input and operation.
The terminal user can customize the RFID association operation in a low-code or code-free VR interactive operation definition mode, and the interactive content in the corresponding VR is triggered by scanning the object article or the body part and the like to which the RFID tag is attached, so that the flexibility of the virtual reality interactive content is improved.
In some embodiments, before the RFID reader reads the target identification in response to the at least one target RFID tag entering the designated read range of the RFID reader, the method may further comprise the steps of:
And responding to the adjustment operation of the target specified read range corresponding to the target RFID card reader, and adjusting the target specified read range according to the adjustment operation, wherein the target specified read range influences the action amplitude and the action precision of the interaction action corresponding to the entity user interface.
In practical application, the RFID card reader can read a plurality of RFID tags at one time, so that the RFID card reader can be used for triggering various interactive operations simultaneously, such as when a user lifts two hands, interaction associated with the RFID tags at the left hand and the right hand can be triggered simultaneously.
Fig. 5 provides a schematic structural diagram of an RFID-based virtual reality device interaction apparatus. And forming an entity user interface through an RFID tag serving as an entity anchor point in the entity space, wherein each RFID tag corresponds to an identifier, and each RFID tag correspondingly stores interactive operation data aiming at the virtual space through the identifier. As shown in fig. 5, the RFID-based virtual reality device interaction apparatus 500 includes:
The acquisition module 501 is configured to respond to that at least one target RFID tag enters a designated reading range of an RFID reader, the RFID reader reads a target identifier, and an RFID server corresponding to the RFID reader acquires target interaction operation data stored corresponding to the target RFID tag through the target identifier, where the target identifier is an identifier corresponding to the target RFID tag;
The parsing module 502 is configured to obtain the target interaction operation data from the RFID server by using the virtual reality device, parse the target interaction operation data, and obtain parsed data;
and the executing module 503 is configured to trigger and execute an interface interaction operation by the virtual reality device in a target virtual space corresponding to the virtual reality device based on the parsed data.
The virtual reality equipment interaction device based on the RFID provided by the embodiment of the application has the same technical characteristics as the virtual reality equipment interaction method based on the RFID provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
As shown in fig. 6, an electronic device 600 according to an embodiment of the present application includes a processor 602 and a memory 601, where a computer program capable of running on the processor is stored, and the steps of the method provided in the foregoing embodiment are implemented when the processor executes the computer program.
Referring to fig. 6, the electronic device further comprises a bus 603 and a communication interface 604, the processor 602, the communication interface 604 and the memory 601 being connected by the bus 603, the processor 602 being arranged to execute executable modules, such as computer programs, stored in the memory 601.
The memory 601 may include a high-speed random access memory (Random Access Memory, abbreviated as RAM), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 604 (which may be wired or wireless), and may use the internet, a wide area network, a local network, a metropolitan area network, etc.
Bus 603 may be an ISA bus, a PCI bus, or an EISA bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 6, but not only one bus or type of bus.
The memory 601 is configured to store a program, and the processor 602 executes the program after receiving an execution instruction, and a method executed by the apparatus for defining a process according to any of the foregoing embodiments of the present application may be applied to the processor 602 or implemented by the processor 602.
The processor 602 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in the processor 602. The processor 602 may be a general-purpose processor, including a central Processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), a digital signal processor (DIGITAL SIGNAL Processing, DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, or discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 601 and the processor 602 reads the information in the memory 601 and performs the steps of the method in combination with its hardware.
Corresponding to the above-mentioned virtual reality device interaction method based on RFID, the embodiment of the application also provides a computer readable storage medium storing computer executable instructions, which when being called and executed by a processor, cause the processor to execute the steps of the above-mentioned virtual reality device interaction method based on RFID.
The virtual reality device interaction device based on RFID provided by the embodiment of the application can be specific hardware on the device or software or firmware installed on the device. The device provided by the embodiment of the present application has the same implementation principle and technical effects as those of the foregoing method embodiment, and for the sake of brevity, reference may be made to the corresponding content in the foregoing method embodiment where the device embodiment is not mentioned. It will be clear to those skilled in the art that, for convenience and brevity, the specific operation of the system, apparatus and unit described above may refer to the corresponding process in the above method embodiment, which is not described in detail herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
As another example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments provided in the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the RFID-based virtual reality device interaction method according to various embodiments of the application. The storage medium includes various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory RAM), a magnetic disk, or an optical disk.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, no further definition or explanation of that in the following figures is necessary, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
It should be noted that the foregoing embodiments are merely illustrative embodiments of the present application, and not restrictive, and the scope of the application is not limited to the embodiments, and although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that any modification, variation or substitution of some of the technical features of the embodiments may be easily contemplated and made by those skilled in the art within the scope of the present application without departing from the spirit of the embodiments. Are intended to be encompassed within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.