Terminal device integrated with RFID function

Abstract

The invention relates to the technical field of intelligent terminal equipment, and discloses terminal equipment integrated with an RFID (Radio Frequency Identification Device) function, which is characterized in that an RFID circuit comprising an RFID chip and a radio frequency front-end circuit which are separately designed is directly arranged on a main board, a CPU (Central Processing Unit) and a power management chip on the main board are directly connected with the RFID chip, and the CPU realizes communication with the RFID chip; the power management chip supplies power to the RFID chip, redundant design of the MCU is reduced, production cost is reduced, market competitiveness of products is improved, the overall thickness of the PDA is reduced due to reduction and introduction of components, the PDA is easier to carry, meanwhile, the problem of poor heat dissipation is solved, light weight, thinness and attractiveness of the products are taken into consideration, and the PDA is more convenient to use. Therefore, market requirements can be better met, and application and development of the RFID and other terminal equipment combination technology in wider fields are promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent terminal equipment, and in particular to a terminal equipment with integrated RFID function. Background Art

[0002] Products with RFID (radio frequency identification) technology currently circulating on the market are usually called stand-alone handheld scanners. They exist as two independent and different product categories with other terminal devices, such as PDA (Personal Digital Assistant). If a stand-alone handheld scanner needs to be used in conjunction with a PDA, a wireless connection between the two must be established through Bluetooth technology. However, this combination faces many inconveniences in actual applications, such as inconvenience in carrying, unsatisfactory data transmission rates, and limitations in application scenarios, which greatly limit its popularity and efficiency.

[0003] Although there are a few PDAs on the market that integrate RFID functions in their overall design, this type of design generally adopts the method of building the RFID module into the motherboard. Although this approach has achieved functional integration, it has also introduced new problems. First, the MCU (microcontroller) built into the RFID module has redundant design, which directly leads to an increase in production costs and is not conducive to the market competitiveness of the product; secondly, the introduction of the RFID module increases the overall thickness of the PDA, which not only affects the portability of the device, but also aggravates the heat dissipation problem, which may lead to a decline in device performance, especially under long-term high-load operation; thirdly, the increase in thickness and heat dissipation problems also affect the appearance design of the product, making it difficult to meet the aesthetic needs of modern consumers for thin and beautiful electronic products.

[0004] Therefore, it is particularly urgent and important to improve and optimize the current RFID technology combined with other terminal equipment.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0006] The present invention provides a terminal device with integrated RFID function to solve the problems existing in the prior art.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A terminal device with integrated RFID function, comprising a mainboard, a CPU, a power management chip and an RFID circuit; wherein:

[0009] The CPU, power management chip and RFID circuit are respectively arranged on the main board;

[0010] The CPU and the power management chip are respectively connected to the RFID circuit;

[0011] The RFID circuit includes an RFID chip and a radio frequency front-end circuit.

[0012] Furthermore, in the terminal device integrated with the RFID function, the terminal device further includes a level conversion chip;

[0013] The level conversion chip is connected between the CPU and the RFID circuit.

[0014] Furthermore, in the terminal device integrated with RFID function, the terminal device also includes a DCDC circuit;

[0015] The DCDC circuit is connected between the power management chip and the RFID circuit.

[0016] Furthermore, in the terminal device integrated with the RFID function, the terminal device further includes a load switch;

[0017] The load switch is arranged between the DCDC circuit and the RFID circuit, and is controlled by the CPU.

[0018] Furthermore, in the terminal device integrated with RFID function, the terminal device also includes an antenna and a combiner;

[0019] The RFID circuit is connected to the antenna through the combiner.

[0020] Furthermore, in the terminal device with integrated RFID function, the terminal device further comprises a first RF coaxial seat, an RF line and a second RF coaxial seat;

[0021] The RFID circuit is connected to the combiner via the first RF coaxial seat, the RF line and the second RF coaxial seat in sequence.

[0022] Furthermore, in the terminal device integrated with RFID function, the terminal device also includes an antenna and an RFID antenna;

[0023] The RFID antenna is connected to the RFID circuit.

[0024] Furthermore, in the terminal device integrated with RFID function, the antenna is an FPC antenna.

[0025] Furthermore, in the terminal device with integrated RFID function, the RFID antenna is an FPC antenna.

[0026] Furthermore, in the terminal device with integrated RFID function, the radio frequency front-end circuit includes at least two SAW filters and a switching switch;

[0027] Each of the SAW filters corresponds to a different frequency band;

[0028] Each of the SAW filters can be connected to the RFID chip via the switching switch, and only one of the SAW filters is connected to the RFID chip via the switching switch at any one time.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides a terminal device with integrated RFID function. The RFID circuit including the RFID chip and the radio frequency front-end circuit of the separated design is directly set on the mainboard, and the CPU and the power management chip on the mainboard are directly connected to the RFID chip. The CPU realizes communication with the RFID chip, and the power management chip realizes power supply to the RFID chip. This not only reduces the redundant design of the MCU and reduces the production cost, which is conducive to improving the market competitiveness of the product, but also reduces the overall thickness of the PDA due to the reduction of components, making it easier to carry. At the same time, it also solves the problem of poor heat dissipation, and takes into account the lightness and aesthetics of the product, so as to better meet market demand and promote the application and development of RFID and other terminal equipment combination technologies in a wider range of fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the circuit structure of a terminal device with integrated RFID function provided by an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the circuit structure of an RFID circuit provided by an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the physical structure of a terminal device with integrated RFID function provided by an embodiment of the present invention.

[0035] Reference numerals:

[0036] Mainboard 1, CPU 2, power management chip 3, RFID circuit 4, level conversion chip 5, DCDC circuit 6, load switch 7, antenna 8, combiner 9, first RF coaxial seat 10, RF line 11, second RF coaxial seat 12;

[0037] RFID chip 401, radio frequency front-end circuit 402. DETAILED DESCRIPTION

[0038] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0040] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0041] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0042] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0043] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0044] In this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0045] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0046] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0047] Please refer to Figure 1-3, an embodiment of the present invention provides a terminal device with integrated RFID function. The specific form of the terminal device is not limited to a specific type, and widely covers terminal devices in various application scenarios such as personal digital assistants (PDA) and point of sale terminals (POS). In order to better explain the solution and deepen the understanding of this solution, the embodiment of the present invention uses PDA as an example for detailed technical analysis. Specifically, the terminal device with integrated RFID function includes a mainboard 1, a CPU 2, a power management chip 3 and an RFID circuit 4; wherein,

[0048] The mainboard 1, CPU 2 and power management chip 3 are all original components of the PDA system;

[0049] The CPU 2, the power management chip 3 and the RFID circuit 4 are respectively arranged on the main board 1;

[0050] The CPU 2 and the power management chip 3 are respectively connected to the RFID circuit 4;

[0051] The RFID circuit 4 includes an RFID chip 401 and a radio frequency front-end circuit 402, which are designed to be separated but tightly integrated on the mainboard, thereby ensuring functional independence and achieving a high degree of integration.

[0052] It is worth noting that the innovation of the embodiment of the present invention lies in that the RFID circuit 4 is seamlessly integrated into the original architecture of the PDA system (i.e., a terminal device with integrated RFID function, the same below), and the CPU 2 is directly responsible for the communication task with the RFID chip 401, while the power management chip 3 is used to accurately control the power supply to the RFID chip 401. This design cleverly avoids the redundant design problem of the additional MCU in the RFID module in the traditional solution, significantly reduces the production cost, and wins stronger market competitiveness for the product.

[0053] In addition, the reduction in the number of components has also brought unexpected added value: the overall thickness of the PDA has been greatly reduced, making the device lighter and easier to carry, perfectly meeting the high portability requirements of modern users, while taking into account the thinness and aesthetics of the product. At the same time, the optimization of the component layout has also effectively improved the heat dissipation performance of the device, solving the heat dissipation problem that may have existed in the past, and further improving the durability of the product and user experience.

[0054] In summary, the embodiments of the present invention not only achieve the deep integration of RFID technology and PDA devices, but also achieve remarkable results in reducing costs, improving performance, optimizing user experience, etc. This innovative achievement not only promotes the rapid development of RFID and PDA combination technology, but also lays a solid foundation for the wide application and expansion of related fields, demonstrating strong market potential and social value.

[0055] Please refer again Figure 1 In one implementation of this embodiment, the PDA system further includes a level conversion chip 5;

[0056] The level conversion chip 5 is connected between the CPU 2 and the RFID circuit 4 .

[0057] It should be noted that when the RFID circuit 4 reuses the original CPU 2 of the PDA system, since the Digital IO port of the CPU 2 is in the 1.8V voltage domain, it does not match the voltage domain required by the RFID chip 401, and since the Digital IO port of the RFID chip 401 is in the 3.3V voltage domain, direct connection may cause signal distortion or communication failure. For this reason, the present embodiment introduces a level conversion chip 5, and designs the Digital IO port of the CPU 2 to preferentially pass through the level conversion chip 5, and then connect to the RFID chip 401, to complete the data transmission between the RFID chip 401 and the CPU 2. The level conversion chip 5 can intelligently adjust the signal level to meet the communication requirements of both parties, thereby ensuring the accuracy and reliability of data transmission.

[0058] This design not only improves the overall stability and reliability of the system, but also further enhances the collaborative working ability between CPU 2 and RFID circuit 4. Through the intervention of level conversion chip 5, CPU 2 can communicate with RFID chip more efficiently and realize accurate control and management of RFID function. At the same time, RFID circuit 4 can also work in a stable signal environment to ensure the normal function of RFID function.

[0059] In the further optimization of this embodiment, the DCDC circuit 6 is introduced as a key link of power conversion to meet the high standard of the RFID circuit 4 for the specific voltage requirement. Figure 1 As shown, the DCDC circuit 6 is cleverly connected between the power management chip 3 and the RFID circuit 4, forming an efficient power conversion channel.

[0060] Specifically, since the power management chip 3 usually provides a 4V system power supply, and the RFID circuit 4 requires a 5V VCC power supply to ensure its stable operation, the role of the DCDC circuit 6 is particularly important. It can accept the 4V input from the power management chip 3, and through an efficient conversion mechanism, stably increase the voltage to 5V to meet the power demand of the RFID circuit 4.

[0061] This design not only ensures that the RFID circuit 4 can obtain a stable and reliable power supply, but also avoids performance degradation or failure problems caused by voltage mismatch. At the same time, the efficient conversion characteristics of the DCDC circuit 6 also reduce energy waste and improve the energy efficiency of the entire PDA system.

[0062] In further optimization of this embodiment, a load switch 7 is introduced as an important component of power management to achieve fine control of the power supply to the RFID circuit 4. Figure 1 As shown, the load switch 7 is cleverly arranged between the DCDC circuit 6 and the RFID circuit 4, forming a controllable power supply channel. More importantly, the load switch 7 is directly controlled by the GPIO (general purpose input and output) signal of the CPU 2, thereby achieving close coordination and cooperation between software and hardware.

[0063] Specifically, when the user does not open the RFID application (App), the CPU 2 controls the load switch 7 to be in an off state through the GPIO signal, thereby cutting off the power supply to the RFID circuit 4. In this way, the RFID circuit 4 will not consume any power, thereby avoiding unnecessary power consumption increase, ensuring the normal operation of the original PDA system function and maximizing the battery life. When the user needs to use the RFID function, he only needs to open the corresponding RFID App, and the CPU 2 will receive the corresponding instruction and control the load switch 7 to close through the GPIO signal, thereby providing a stable 5V power supply for the RFID circuit 4.

[0064] This design not only effectively solves the problem of increased power consumption that may be caused by the introduction of RFID circuit 4, but also improves the intelligence level of the system and user experience. Users can freely control the opening and closing of the RFID function according to actual needs, which not only ensures the flexibility of the function, but also optimizes energy consumption.

[0065] In the PDA system, the design of the antenna is a key link that needs to be carefully considered. Since modern PDA systems generally integrate wireless functions, that is, have antennas 8, how to efficiently use or configure antennas to support RFID functions has become an important issue. In this embodiment, on the one hand, the RFID circuit 4 can share the antenna 8, and on the other hand, the RFID circuit 4 can use a single RFID antenna.

[0066] like Figure 1 As shown, in the first embodiment, the RFID circuit 4 is connected to the antenna 8 via a combiner 9 to share the antenna 8 of the PDA system.

[0067] It should be noted that the antenna 8 can be, for example, a WIFI antenna, a cellular antenna, etc. Exemplarily, when the antenna 8 is a WIFI antenna, a corresponding WIFI circuit is provided on the mainboard 1, and the antenna 8 is provided in the terminal device and connected to the WIFI circuit, such as on the inner wall of the whole device. If it is an FPC antenna, it is attached to the inner wall of the whole device.

[0068] In this embodiment, the RFID circuit 4 and the existing antenna 8 of the PDA system share the antenna through the combiner 9. The combiner 9 is a key component that can combine signals from different circuits (such as the RFID circuit and the WIFI circuit) to the same antenna for transmission or reception, while ensuring that the signals do not interfere with each other.

[0069] The advantages of this implementation are:

[0070] Space saving: There is no need to design a separate antenna for the RFID function, saving valuable internal space.

[0071] Cost-effectiveness: The number of antennas is reduced, which reduces the overall cost.

[0072] Simplified design: Antenna layout and wiring are simpler, reducing design complexity.

[0073] In the second embodiment, the RFID circuit 4 is provided with a separate RFID antenna, that is, the RFID circuit 4 is connected to a separate RFID antenna and does not share the antenna 8 of the PDA system.

[0074] It should be noted that the RFID antenna is arranged in the terminal device, such as on the inner wall of the whole device. If it is an FPC antenna, it is attached to the inner wall of the whole device.

[0075] In this embodiment, the antenna 8 and the RFID antenna are independently arranged on the mainboard 1, and are connected to corresponding circuits. This design is suitable for the case where the internal space of the PDA system is relatively sufficient.

[0076] The advantages of this implementation are:

[0077] Superior performance: Wireless signals such as RFID and WIFI are completely independent and do not interfere with each other, ensuring the communication quality of each other.

[0078] Easy debugging: The antenna and circuit can be debugged separately, which reduces the overall debugging difficulty.

[0079] High flexibility: Antennas with different specifications and performances can be selected as needed to meet specific communication needs.

[0080] It is understandable that when selecting an antenna design solution, it is necessary to comprehensively consider factors such as the specific needs of the PDA system, internal space, cost budget, and performance requirements. If the internal space of the system is limited and there are strict requirements on cost, a solution of sharing antenna 8 through combiner 9 can be considered; if the internal space of the system is relatively sufficient and there are high requirements on communication performance, a solution of separately setting antenna 8 and RFID antenna can be selected. However, no matter which solution is chosen, it is necessary to conduct sufficient testing and verification during the design and debugging process to ensure the stability and reliability of the system.

[0081] In a further refinement of this embodiment, three key components, namely, the first RF coaxial seat 10, the RF line 11 and the second RF coaxial seat 12, are introduced to improve the connection design between the RFID circuit 4 and the combiner 9. Figure 1 As shown, these components together form a stable and efficient signal transmission channel.

[0082] Specifically, the RFID circuit 4 is first connected to the RF line 11 through the first RF coaxial socket 10. The RF coaxial socket is a connector specially used for radio frequency signal transmission. It has good shielding performance and stable electrical characteristics, which can ensure that the radio frequency signal output by the RFID circuit 4 is not interfered by the outside world during the transmission process. The RF line 11 serves as a medium for signal transmission, and efficiently transmits the radio frequency signal of the RFID circuit 4 to the next link.

[0083] Subsequently, the RF line 11 is connected to the combiner 9 through the second RF coaxial seat 12. The second RF coaxial seat 12 also plays the role of signal transmission and connection, which ensures that the radio frequency signal in the RF line 11 can accurately enter the combiner 9. As a key component for signal merging, the combiner 9 combines and processes the radio frequency signal from the RFID circuit 4 with other radio frequency signals such as the WIFI circuit, and then transmits or receives them uniformly through the antenna 8.

[0084] This design not only ensures the stability and reliability of signal transmission between the RFID circuit 4 and the combiner 9, but also improves the integration and flexibility of the entire PDA system. Through the coordinated use of the first RF coaxial seat 10, the RF line 11 and the second RF coaxial seat 12, the RFID circuit 4 can be easily shared with the existing antenna, thereby expanding the function of the PDA system without adding additional antennas.

[0085] In addition, this design is also convenient for subsequent maintenance and upgrade work. If it is necessary to replace or upgrade components such as the RFID circuit 4, the RF line 11 or the combiner 9, the replacement or upgrade operation can be performed by simply disconnecting the corresponding RF coaxial socket connection, without the need for large-scale disassembly and reorganization of the entire PDA system. This greatly improves the maintainability and scalability of the system.

[0086] It is understandable that if the RFID circuit 4 is provided with a separate RFID antenna, the RFID circuit 4 can be connected to the separate RFID antenna via an RF coaxial socket to ensure the stability and minimum loss of the radio frequency signal during transmission.

[0087] In this embodiment, the FPC (Flexible Printed Circuit) antenna is selected as the preferred solution for the antenna 8 and the RFID antenna based on its advantages in many aspects. Compared with the existing RFID antennas, which mostly use ceramic antennas, which have the problems of high cost and thick thickness, the FPC antenna is very suitable for use in electronic devices such as PDA systems with high requirements for internal space layout due to its unique flexibility, plasticity and lightness.

[0088] Advantages of FPC antenna:

[0089] Strong spatial adaptability: FPC antennas can be flexibly bent and folded to adapt to various complex spatial environments such as the side walls, top, and bottom of the PDA. This high degree of shape compatibility allows designers to make full use of limited internal space and optimize antenna layout.

[0090] Stable and reliable performance: Although the FPC antenna is highly flexible, its electrical performance and radiation characteristics are very stable. Through precise design and manufacturing process, it can be ensured that the FPC antenna can maintain excellent communication performance in various working environments.

[0091] Lightweight and easy to integrate: FPC antennas are thin and light, making them easy to integrate into PDA systems. At the same time, their manufacturing process is relatively simple and low-cost, which helps reduce the overall product cost.

[0092] Large design freedom: Since FPC antennas can be customized as needed, designers can choose the appropriate antenna shape and size based on the specific needs of the PDA system and the internal space layout. This high degree of design freedom helps to achieve a perfect match between the antenna and the system.

[0093] As for antenna 8, the FPC antenna can ensure stable and high-speed wireless network connection inside the PDA system. Its good radiation characteristics and signal coverage can meet various needs of users for wireless network connection.

[0094] For RFID antennas, FPC antennas also have excellent performance. Not only can they adapt to the complex spatial environment inside the PDA system, but they can also ensure accurate reading and identification of RFID tags. This is crucial for PDA systems that need to expand RFID functions.

[0095] In the RF front-end circuit design of this embodiment, an innovative combination of at least two SAW (Surface Acoustic Wave) filters and a switching switch is introduced. This design significantly improves the flexibility and adaptability of the RFID system.

[0096] Specifically, the RF front-end circuit 402 includes at least two SAW filters and a switch;

[0097] Each of the SAW filters corresponds to a different frequency band;

[0098] Each of the SAW filters can be connected to the RFID chip 401 through the switch, and only one of the SAW filters is connected to the RFID chip 401 through the switch at any time.

[0099] It should be noted that SAW filters play a key role in RF front-end circuits with their excellent frequency selectivity and low insertion loss characteristics. They are used to filter out unnecessary frequency components and ensure the purity of the signal.

[0100] By configuring SAW filters of different frequency bands, the RF front-end circuit 402 can support RFID tag recognition of multiple frequency bands. This design breaks the limitation that a single module is only applicable to a single region, so that the same RF front-end circuit 402 can adapt to the frequency band requirements of different countries and regions.

[0101] The introduction of the switch allows the system to selectively connect different SAW filters as needed. At any one time, only one SAW filter is connected to the RFID chip through the switch, thereby realizing the identification of RFID tags in a specific frequency band. This flexible switching mechanism greatly improves the compatibility and practicality of the system.

[0102] In addition, as RFID technology continues to develop and new frequency bands emerge, the system can easily upgrade its frequency band support capabilities by replacing or adding new SAW filters. At the same time, the design of the switch also makes maintenance and troubleshooting simpler and faster.

[0103] It can be understood that the specific role of other circuit designs in the RF front-end circuit 402, such as PA, Att, etc., is to ensure the normal operation of various functions of the RF front-end circuit 402. In view of the fact that these circuit designs have been implemented in many existing technologies and are not the focus of the design of this solution, they will not be elaborated in depth here.

[0104] Although the terms such as PDA, RFID, CPU, etc. are used more frequently in this application, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0105] The present invention provides a terminal device with integrated RFID function. The RFID circuit including the RFID chip and the radio frequency front-end circuit of the separated design is directly set on the mainboard, and the CPU and the power management chip on the mainboard are directly connected to the RFID chip. The CPU realizes communication with the RFID chip, and the power management chip realizes power supply to the RFID chip. This not only reduces the redundant design of the MCU and reduces the production cost, which is conducive to improving the market competitiveness of the product, but also reduces the overall thickness of the PDA due to the reduction of components, making it easier to carry. At the same time, it also solves the problem of poor heat dissipation, and takes into account the lightness and aesthetics of the product, so as to better meet market demand and promote the application and development of RFID and other terminal equipment combination technologies in a wider range of fields.

[0106] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A terminal device with integrated RFID function, characterized in that: It comprises a mainboard (1), a CPU (2), a power management chip (3) and an RFID circuit (4); wherein: The CPU (2), the power management chip (3) and the RFID circuit (4) are respectively arranged on the main board (1); The CPU (2) and the power management chip (3) are respectively connected to the RFID circuit (4); The RFID circuit (4) comprises an RFID chip (401) and a radio frequency front-end circuit (402).

2. The terminal device with integrated RFID function according to claim 1, characterized in that: The terminal device also includes a level conversion chip (5); The level conversion chip (5) is connected between the CPU (2) and the RFID circuit (4).

3. The terminal device with integrated RFID function according to claim 1, characterized in that: The terminal device further includes a DCDC circuit (6); The DCDC circuit (6) is connected between the power management chip (3) and the RFID circuit (4).

4. The terminal device with integrated RFID function according to claim 3, characterized in that: The terminal device also includes a load switch (7); The load switch (7) is arranged between the DCDC circuit (6) and the RFID circuit (4), and is controlled by the CPU (2).

5. The terminal device with integrated RFID function according to claim 1, characterized in that: The terminal device also includes an antenna (8) and a combiner (9); The RFID circuit (4) is connected to the antenna (8) via the combiner (9).

6. The terminal device integrated with RFID function according to claim 5, characterized in that: The terminal device further comprises a first RF coaxial seat (10), an RF line (11) and a second RF coaxial seat (12); The RFID circuit (4) is connected to the combiner (9) in sequence through the first RF coaxial seat (10), the RF line (11) and the second RF coaxial seat (12).

7. The terminal device integrated with RFID function according to claim 1, characterized in that: The terminal device also includes an antenna (8) and an RFID antenna; The RFID antenna is connected to the RFID circuit (4).

8. The terminal device with integrated RFID function according to claim 6 or 7, characterized in that: The antenna (8) is an FPC antenna.

9. The terminal device integrated with RFID function according to claim 7, characterized in that: The RFID antenna is an FPC antenna.

10. The terminal device integrated with RFID function according to claim 7, characterized in that: The radio frequency front-end circuit (402) comprises at least two SAW filters and a switching switch; Each of the SAW filters corresponds to a different frequency band; Each of the SAW filters can be connected to the RFID chip (401) via the switching switch, and only one of the SAW filters is connected to the RFID chip (401) via the switching switch at any one time.

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