Display screen with heating function and terminal equipment

Abstract

The utility model relates to the technical field of display, and discloses a display screen with a heating function and terminal equipment, which not only retains a short-distance wireless communication function, but also can realize the heating function of the display screen by utilizing a magnetocaloric effect to be matched with a metal frame in an LCM (Liquid Crystal Module) display module by expanding the function of a built-in NFC (Near Field Communication) coil. The problems of high cost, poor reliability, large power consumption, lack of intelligent control and the like in the prior art are effectively solved, the performance of the display screen in a low-temperature environment is remarkably improved, the service life of the display screen in the low-temperature environment is remarkably prolonged, and remarkable practicability and innovativeness are achieved.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display screen and terminal device with heating function. Background Technology

[0002] The demand for touch display modules (TDMs) in low-temperature environments (temperatures below or equal to -20°C) is widespread and urgent. This demand is evident in numerous fields, including but not limited to automotive electronics, industrial control, medical equipment, outdoor electronic devices, consumer electronics, aerospace, military equipment, cold chain logistics, outdoor sports, and smart homes. These fields place higher demands on the performance of TDMs in low-temperature environments, thereby driving the research and development and application of touch display modules with superior low-temperature performance. However, currently common TDMs on the market are typically only suitable for operating temperatures down to -20°C and storage temperatures down to -30°C. Forcing the use of these TDMs in environments below -20°C may lead to a series of problems, such as a significant decrease in touch sensitivity, display ghosting, material embrittlement and deformation, and even malfunctions such as black screens or screen flickering.

[0003] Currently, the industry mainly offers the following two types of cryogenic solutions for TDM:

[0004] The first approach is to use low-temperature resistant materials to manufacture TDM. However, this approach has the following significant drawbacks:

[0005] (1) High material costs: Low-temperature resistant LCD panels require special liquid crystal materials, polarizers and backlight modules, and the cost of these materials is much higher than that of ordinary LCD modules. Therefore, the use of low-temperature resistant materials will significantly increase the production cost of TDM.

[0006] (2) Complex manufacturing process: In order to ensure the stability of the panel in low temperature environment, more stringent process control and testing procedures are required during manufacturing. These additional process requirements not only increase the difficulty of production, but also further increase the production cost.

[0007] (3) Shortened lifespan: Under extreme low temperature conditions, the aging rate of liquid crystal materials and backlight modules will be accelerated, thereby affecting the lifespan of TDM and causing its performance to decline in long-term use.

[0008] The second approach utilizes the impedance of the traces to generate heat. Specifically, this involves attaching an ITO (indium tin oxide) conductive film under the cover plate, etching circuitry onto the ITO film, and then connecting it to the motherboard via an FPC (flexible printed circuit board). When the motherboard is powered on, the impedance of the traces in the ITO conductive film converts electrical energy into heat, thereby heating the TDM module. However, this approach also has several drawbacks:

[0009] (1) High cost: This solution involves ITO conductive film, FPC, ACF (anisotropic conductive adhesive), and related etching and welding processes. The processing costs of these materials and processes are high, which leads to an increase in the overall cost.

[0010] (2) Insufficient reliability: The heating circuit of the ITO conductive film is prone to short circuits or open circuits. In addition, during long-term use, the ITO conductive film may experience aging, damage, yellowing under light, and low-temperature bubbling, which will affect its performance and reliability.

[0011] (3) Lack of intelligence: The solution cannot automatically monitor the temperature and heat as needed, and lacks intelligent control functions.

[0012] (4) Poor light transmittance: The presence of ITO conductive film will reduce the light transmittance of the visible area, thus affecting the display effect.

[0013] (5) High power consumption: This solution requires a separate high current power supply for heating, resulting in high power consumption and posing a challenge to the energy management of the equipment.

[0014] Given that both of the above-mentioned existing solutions have certain limitations and shortcomings, there is an urgent need to improve the existing technology in order to develop a touch display module that can operate stably in low-temperature environments, has reliable performance, reasonable cost, and intelligent control functions.

[0015] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0016] This invention provides a display screen and terminal device with a heating function, which heats the display screen by utilizing the magnetocaloric effect of the NFC coil to solve the problem of display screen performance degradation in low-temperature environments, while retaining the short-range wireless communication function of the NFC coil.

[0017] To achieve the above objectives, this utility model provides the following technical solution:

[0018] In a first aspect, this utility model provides a display screen with a heating function, including a control module, an LCM display module, and an NFC coil; wherein...

[0019] The LCM display module includes a metal frame and an LCM assembly:

[0020] The metal frame is located on the back of the LCM component and surrounds the periphery of the LCM component;

[0021] The LCM component is used to display image information;

[0022] The control module is electrically connected to the NFC coil and is used to control the NFC coil to perform short-range wireless communication, or to control the NFC coil to heat the metal frame using the magnetocaloric effect to increase the temperature of the LCM component.

[0023] Furthermore, in the heated display screen, the NFC coil is disposed on the back of the metal frame away from the LCM component.

[0024] Furthermore, the display screen with heating function also includes a front cover;

[0025] The front shell is located on the back of the metal frame away from the LCM component and covers the periphery of the LCM display module;

[0026] The NFC coil is disposed on the side of the front cover facing the metal frame.

[0027] Furthermore, in the display screen with heating function, the control module includes an MCU and a temperature sensing module;

[0028] The temperature sensing module is electrically connected to the MCU and is used to collect the temperature of the LCM component and transmit it to the MCU.

[0029] The MCU is electrically connected to the NFC coil and is used to control the NFC coil to perform short-range wireless communication, or to control the NFC coil to heat the metal frame using the magnetocaloric effect when the temperature of the LCM component is low, so as to increase the temperature of the LCM component.

[0030] Furthermore, in the display screen with heating function, the temperature sensing module is an NTC thermistor.

[0031] Furthermore, in the display screen with heating function, the NTC thermistor is connected in series with a voltage divider resistor and then electrically connected to the MCU.

[0032] Furthermore, in the display screen with heating function, the control module is electrically connected to the NFC coil via an NFC chip on one hand, and to the NFC coil via a high-speed electronic switch and an LLC resonant circuit on the other hand.

[0033] Furthermore, in the display screen with heating function, the LCM component includes a glass cover plate, an optical adhesive layer, a first polarizer, a CF substrate, a TFT substrate, a second polarizer, and a backlight module arranged sequentially.

[0034] Furthermore, the display screen with heating function also includes a touch panel;

[0035] The touch panel is located on the front of the LCM component;

[0036] The touch panel is connected to the control module and is used to receive user touch operations to instruct the control module to control the NFC coil for near-field wireless communication, or to use the magnetocaloric effect to heat the metal frame to increase the temperature of the LCM component.

[0037] Furthermore, in the display screen with heating function, a thermally conductive silicone pad is provided between the inner surface of the metal frame and the back and periphery of the LCM component.

[0038] Secondly, this utility model provides a terminal device, including a display screen with a heating function as provided in the first aspect above.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] This utility model provides a display screen and terminal device with heating function. By expanding the function of the built-in NFC coil, it not only retains the short-range wireless communication function, but also uses the magnetocaloric effect in conjunction with the metal frame in the LCM display module to achieve the heating function of the display screen. This effectively solves the problems of high cost, poor reliability, high power consumption and lack of intelligent control in the prior art, and significantly improves the performance and service life of the display screen in low-temperature environments. It has significant practicality and innovation.

[0041] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is one of the structural schematic diagrams of a display screen with heating function provided in Embodiment 1 of this utility model;

[0044] Figure 2 This is a second schematic diagram of the structure of a display screen with heating function provided in Embodiment 1 of this utility model;

[0045] Figure 3 This is the third schematic diagram of a display screen with heating function provided in Embodiment 1 of this utility model;

[0046] Figure 4 This is a schematic diagram of the structure of the LCM display module provided in Embodiment 1 of this utility model;

[0047] Figure 5 This is the fourth structural schematic diagram of a display screen with heating function provided in Embodiment 1 of this utility model.

[0048] Figure label:

[0049] 1. Control module; 2. LCM display module; 3. NFC coil; 4. Touch panel; 5. Front shell; 6. Voltage divider resistor; 7. NFC chip; 8. High-speed electronic switch; 9. LLC resonant circuit.

[0050] MCU 101, temperature sensing module 102;

[0051] Metal frame 201, LCM component 202;

[0052] Glass cover 2021, optical adhesive layer 2022, first polarizer 2023, CF substrate 2024, TFT substrate 2025, second polarizer 2026, backlight module 2027. Detailed Implementation

[0053] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0054] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0055] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0056] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0057] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order between these entities or operations.

[0058] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0059] In this application, expressions such as "greater than", "less than", and "exceeding" are understood to exclude the stated number; expressions such as "above", "below", and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times", unless otherwise explicitly specified.

[0060] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0061] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0062] Example 1

[0063] Please refer to Figure 1 This utility model embodiment provides a display screen with heating function. The display screen has a compact overall structure and high functional integration, and is mainly composed of several key components such as control module 1, LCM display module 2 and NFC coil 3.

[0064] The LCM display module 2 further includes a metal frame 201 and an LCM component 202;

[0065] In terms of the positional relationship of the components, the metal frame 201 is carefully positioned on the back of the LCM display module 2, and covers the periphery of the LCM component 202 in a wrapping manner. This layout design not only provides a certain degree of physical protection for the LCM component 202, preventing it from being damaged by external impacts or scratches, but also lays the structural foundation for the subsequent heating function.

[0066] As one of the core components of the LCM display module 2, and even the entire display screen, the LCM component 202 undertakes the important task of displaying image information. It can accurately present various texts, graphics, images, and other content based on the received image data signals, providing users with an intuitive and clear visual information display.

[0067] Control module 1 acts as the "brain" of the entire display screen, working closely with NFC coil 3 via an electrical connection. Control module 1 possesses powerful control functions. On one hand, it can precisely control NFC coil 3 for near-field wireless communication. When the terminal device needs to interact with other NFC-enabled devices, such as for payment information transmission or authentication information transfer, control module 1 controls NFC coil 3 to perform near-field wireless communication, establishing a stable wireless connection with other devices according to a preset communication protocol and frequency, and completing accurate data transmission. On the other hand, control module 1 can also flexibly control NFC coil 3 to heat the metal frame 201 using the magnetocaloric effect. In low-temperature environments, when the temperature of LCM component 202 is detected to be lower than the required normal operating temperature, control module 1 will promptly control NFC coil 3 to perform the heating function. NFC coil 3 generates an alternating magnetic field, which in turn generates a ring-shaped eddy current within the metal frame 201, thus producing a magnetocaloric effect to convert electrical energy into heat energy. This heat energy heats the metal frame 201, which is in close contact with it, gradually increasing its temperature. Since the metal frame 201 is tightly attached to the LCM component 202, the increase in temperature of the metal frame 201 will further transfer heat to the LCM component 202, thereby increasing the overall temperature of the LCM component 202 and ensuring that it can work normally in low-temperature environments and maintain good display performance.

[0068] It is worth noting that in some common terminal devices, such as PDAs (Personal Digital Assistants), POS machines (Point of Sales), outdoor sports watches, and PINPADs, in addition to the display screens for information display, these devices usually also have built-in NFC coils to achieve near-field wireless communication functions due to business needs or functional expansion requirements. The display screen in this embodiment cleverly utilizes this existing hardware foundation, effectively expanding the functionality of the built-in NFC coil 3 through in-depth technological research and innovation. While retaining the original near-field wireless communication function of the NFC coil 3, its magnetothermal effect potential is further explored, enabling it to work in conjunction with the inherent metal frame 201 in the LCM display module 2 to achieve a heating function for the display screen.

[0069] This innovative design successfully solves many problems existing in current technologies. In terms of cost, by eliminating the need for additional specialized heating elements and complex heating circuits, and instead fully utilizing the device's existing NFC coil 3 and metal frame 201, hardware and manufacturing costs are significantly reduced. Regarding reliability, by optimizing the precise control of the NFC coil 3 heating process by the control module 1, equipment malfunctions caused by uneven heating or overheating are avoided, significantly improving the display's reliability in low-temperature environments. In terms of power consumption, the intelligent heating control strategy precisely adjusts the heating power based on the actual ambient temperature and the display's operating status, avoiding unnecessary energy waste and effectively reducing power consumption. Regarding intelligent control, the control module 1 can monitor changes in ambient and display temperatures in real time, and automatically determine whether to activate the heating function and adjust the heating intensity based on preset temperature thresholds, achieving intelligent management of the display's heating process.

[0070] In summary, the display screen with heating function provided by this utility model significantly improves the performance and service life of the display screen in low-temperature environments through ingenious technological innovation and functional integration. It has significant practicality and innovation, and provides strong technical support for the stable operation of terminal devices in low-temperature environments.

[0071] Understandably, as the core control unit of the entire display device, the control module 1 is also used to control the LCM component 202 to display various types of image information, including but not limited to text, graphics, symbols, animations, and videos. It can precisely specify parameters such as pixel position, color depth, brightness, and contrast of the image to ensure that the displayed image content is clear, accurate, and vivid, meeting the visual display needs of different application scenarios.

[0072] The control module 1 also plays a crucial role in updating and switching image information. It can respond in real time to changes in external commands or internal programs, rapidly adjusting the image content displayed by the LCM component 202. For example, when the terminal device performs interface switching or data updates, the control module 1 can promptly send corresponding control signals to the LCM component 202, enabling it to quickly and smoothly complete image updates and switching, avoiding stuttering, flickering, and other undesirable phenomena, thus providing users with a smooth and stable visual experience.

[0073] In addition, the control module 1 can dynamically adjust the display parameters of the LCM component 202 based on factors such as ambient light and user operating habits. For example, in dimly lit environments, it automatically increases the brightness of the LCM component 202 to ensure that users can clearly see the displayed content; after users have operated the device for a long time, it appropriately reduces the display brightness or adjusts the color mode to reduce user eye fatigue.

[0074] In summary, the electrical connection between the control module 1 and the LCM component 202, as well as the control function of the control module 1 on the display image information of the LCM component 202, are key aspects to ensure the normal, stable, and efficient operation of the display device.

[0075] Please refer to this again. Figure 1 In one embodiment of this invention, the NFC coil 3 is disposed on the back of the metal frame 201 away from the LCM component 202.

[0076] It should be noted that this structural layout allows the NFC coil 3 to fit tightly with the metal frame 201, efficiently transferring heat to the metal frame 201 through the magnetocaloric effect, thereby increasing the temperature of the LCM component 202 and ensuring the performance and stability of the display in low-temperature environments.

[0077] Please refer to Figure 2 In one embodiment of this invention, the display screen with heating function is further equipped with an important component called the front shell 5. As an important part of the display screen device, the front shell 5 is located on the back of the metal frame 201 away from the LCM assembly 202 and covers the periphery of the LCM display module 2. Structurally, it plays a role in protecting the LCM display module 2, effectively preventing direct collisions, scratches, and other damage to the LCM display module 2 from external objects. At the same time, it also provides a certain degree of aesthetics and integrity to the entire display screen device.

[0078] With this specific structural layout, the mounting position of the NFC coil 3 offers greater flexibility. Specifically, the NFC coil 3 is not necessarily mounted on the metal frame 201, but can be selectively mounted on the front housing 5 (specifically, on the side of the front housing 5 facing the metal frame 201). This design change means that the NFC coil 3 has dual possibilities in its positional arrangement: on the one hand, it can be positioned according to... Figure 1 The embodiment shown is mounted on the metal frame 201; on the other hand, it can also be based on... Figure 2 The illustrated implementation is located on the front housing 5. This flexible positioning provides greater freedom in the design and manufacturing of the display device, allowing for rational selection based on different application scenarios, space constraints, performance requirements, and other factors.

[0079] However, regardless of whether the NFC coil 3 is located on the metal frame 201 or the front shell 5, it can work synergistically with the metal frame 201, generating eddy currents through electromagnetic induction. When an alternating current flows through the NFC coil 3, it generates an alternating magnetic field in the surrounding space. As a conductor, the metal frame 201, when placed in this alternating magnetic field, will generate an induced electromotive force according to Faraday's law of electromagnetic induction, thus forming an induced current, i.e., eddy currents. As these eddy currents flow within the metal frame 201, due to the resistance of the metal frame 201, according to Joule's law, the eddy currents convert electrical energy into heat energy, thereby achieving the heating function. This heating mechanism based on the eddy current effect is one of the key physical principles for the display device to achieve the heating function in this embodiment, and the cooperative relationship between the NFC coil 3 and the metal frame 201 is an important structural basis for realizing this function.

[0080] Please refer to Figure 3 In one embodiment of this invention, the control module 1 includes an MCU 101 and a temperature sensing module 102. This modular design helps to achieve clear division and efficient integration of functions, providing a solid hardware foundation for the stable operation and intelligent control of the entire display device.

[0081] From the perspective of structural connection, the temperature sensing module 102 and the MCU 101 establish a close data interaction channel through electrical connection.

[0082] The temperature sensing module 102, as a dedicated component for temperature detection, possesses high-precision temperature sensing capabilities. It is precisely positioned to accurately reflect the temperature of the LCM component 202, enabling real-time and accurate acquisition of temperature information from the LCM component 202. After acquiring temperature data, the temperature sensing module 102 quickly transmits this data as electrical signals to the MCU 101 via electrical connection lines, providing data support for subsequent temperature analysis and control decisions.

[0083] On the other hand, the MCU 101, as the core control unit of the control module 1, undertakes the important task of coordinating and controlling the various functions of the entire display device. It not only maintains an electrical connection with the temperature sensing module 102 to obtain real-time temperature data, but also establishes an electrical connection with the NFC coil 3. This electrical connection enables the MCU 101 to precisely control the operating state of the NFC coil 3.

[0084] Specifically, the MCU 101 has dual control functions. First, it can control the NFC coil 3 for short-range wireless communication. When the terminal device needs to interact with other NFC-enabled devices, such as for payment information transmission or identity verification, the MCU 101 will control the NFC coil 3 to perform short-range wireless communication according to a preset communication protocol and program logic. This allows the coil to establish a stable wireless connection with other devices under the influence of an alternating magnetic field at a specific frequency, and to complete accurate data transmission. This function meets the business needs of terminal devices in short-range wireless communication and expands the application scenarios of the display device.

[0085] Secondly, the MCU 101 also features intelligent heating control. When the temperature data of the LCM component 202 transmitted by the temperature sensing module 102 is lower than the preset normal operating temperature threshold, the MCU 101 will promptly determine that the LCM component 202 is in a low-temperature state, and at this time it will quickly activate the heating mode. The MCU 101 controls the NFC coil 3 to perform the heating function, causing the NFC coil 3 to generate a magnetocaloric effect under the action of an alternating magnetic field of a specific frequency. In this process, the NFC coil 3 converts electrical energy into heat energy, which is then transferred to the metal frame 201 in close contact with it through thermal conduction, causing the temperature of the metal frame 201 to gradually increase. Since the metal frame 201 and the LCM component 202 are in close contact, the increase in the temperature of the metal frame 201 will further transfer heat to the LCM component 202, thereby increasing the overall temperature of the LCM component 202 and ensuring that it can work normally in a low-temperature environment and maintain good display performance. This intelligent heating control mechanism can not only effectively solve the problem of performance degradation of LCM component 202 in low temperature environment, but also accurately control the heating process according to the actual temperature, avoid unnecessary energy waste, and improve the energy efficiency ratio of the entire display device.

[0086] In summary, the collaborative working relationship between the MCU 101, the temperature sensing module 102, and the NFC coil 3 in the control module 1 provides a reliable technical guarantee for realizing the short-range wireless communication and intelligent heating functions of the display device, and significantly improves the adaptability and performance of the display device in various environments.

[0087] In one embodiment of this invention, the temperature sensing module 102 is an NTC (Negative Temperature Coefficient) thermistor.

[0088] NTC thermistors, as electronic components with unique temperature characteristics, are widely used in the field of temperature detection. Their core characteristic lies in the significant and regular change in resistance with temperature variations, making them an ideal choice for real-time monitoring of the LCM component 202 temperature.

[0089] Specifically, the resistance of an NTC thermistor exhibits a negative correlation with temperature; that is, as the temperature increases, its resistance decreases, and vice versa. Based on this characteristic, when an NTC thermistor is used for temperature monitoring of the LCM component 202, it can sense the temperature changes of the LCM component 202 in real time and convert them into changes in resistance. Subsequently, through the connected circuitry, these changes in resistance are further converted into electrical signals, such as voltage or current signals, which contain the temperature information of the LCM component 202.

[0090] These electrical signals containing temperature information are precisely transmitted to the MCU 101. As the core processing unit of the control module 1, the MCU 101 has powerful data processing capabilities. It can accurately analyze and process the received electrical signals, and through built-in algorithms and programs, restore the electrical signals to specific temperature values, thereby realizing real-time monitoring and accurate acquisition of the temperature of the LCM component 202.

[0091] In practical applications, to achieve effective connection between the NTC thermistor and the LCM component 202 and accurate transmission of temperature data, the NTC thermistor may optionally be specifically mounted on an FPC (Flexible Printed Circuit) connected to the LCM component 202. As a circuit connection method with high flexibility and good electrical performance, the FPC can well adapt to the structural characteristics and installation requirements of the LCM component 202. Mounting the NTC thermistor on the FPC not only ensures close contact between the NTC thermistor and the LCM component 202 for accurate temperature sensing, but also facilitates circuit connection and signal transmission, improving the reliability and stability of the entire temperature monitoring system. Simultaneously, this design also helps optimize the internal space layout of the display device, reduces wiring complexity, and improves production efficiency and product quality.

[0092] Please refer to this again. Figure 3In one embodiment of this invention, the NTC thermistor and a voltage divider resistor 6 are connected in series, and this series circuit is then electrically connected to the MCU 101. This circuit connection design is carefully considered to fully utilize the temperature characteristics of the NTC thermistor and the fixed resistance of the voltage divider resistor 6 to accurately convert temperature information into an electrical signal that the MCU 101 can recognize and process.

[0093] From a circuit principle perspective, the NTC thermistor and the voltage divider resistor 6 form a voltage divider circuit when connected in series. In this circuit, according to the voltage divider principle of a series circuit, the total voltage is distributed across each resistor according to their resistance values. Since the resistance of the NTC thermistor changes with temperature, while the resistance of the voltage divider resistor 6 remains constant, when the ambient temperature (i.e., the temperature of the LCM component 202) changes, the resistance of the NTC thermistor changes accordingly, causing a change in the total resistance of the entire series circuit. According to Ohm's Law I=U / R (where I is current, U is voltage, and R is resistance), when the power supply voltage remains constant, a change in the total resistance will cause a change in the current in the circuit. Furthermore, according to the voltage divider formula U1=IR1 (where U1 is the voltage across the NTC thermistor, I is the circuit current, and R1 is the resistance of the NTC thermistor), the change in current will further cause a change in the voltage across the NTC thermistor.

[0094] In other words, as the temperature changes, the resistance of the NTC thermistor changes, which in turn causes a change in the voltage across its terminals, thus successfully converting temperature changes into voltage changes. This voltage signal containing temperature information is then transmitted to the MCU 101 via electrical connection lines.

[0095] This design, which uses an NTC thermistor and voltage divider resistor 6 in series to form a voltage divider circuit, converts temperature changes into voltage changes and transmits them to the MCU 101, has advantages such as simple structure, low cost, and high reliability. It effectively enables real-time monitoring of the LCM component 202's temperature, providing accurate and reliable temperature data support for the MCU 101 to perform corresponding control operations based on temperature conditions, such as controlling the heating of the NFC coil 3. This ensures that the entire display device operates stably and efficiently under various temperature environments.

[0096] Please refer to this again. Figure 3 In one embodiment of this invention, two different electrical connection paths are constructed between the control module 1 and the NFC coil 3 to meet diverse functional requirements and precise control requirements.

[0097] On one hand, the control module 1 is electrically connected to the NFC coil 3 via the NFC chip 7. The NFC chip 7, as an integrated circuit specifically designed for short-range wireless communication, possesses powerful signal processing and protocol parsing capabilities. It can encode and modulate control commands from the control module 1 according to the NFC communication protocol standard, and then send the processed signals to the NFC coil 3 via the electrical connection. Upon receiving these signals, the NFC coil 3 generates corresponding electromagnetic field changes under the influence of an alternating magnetic field at a specific frequency, thereby enabling data interaction with other NFC-enabled devices, such as transmitting payment information, verifying identity information, and sharing files. This method of directly connecting the NFC chip 7 to the NFC coil 3 ensures the stability and reliability of the short-range wireless communication function, enabling fast and accurate data transmission and meeting the business needs of terminal devices in various short-range communication scenarios.

[0098] On the other hand, the control module 1 is electrically connected to the NFC coil 3 via a high-speed electronic switch 8 and an LLC resonant circuit 9. This connection method is mainly to realize the function of heating related components using the magnetocaloric effect of the NFC coil 3.

[0099] The high-speed electronic switch 8, as a key control element in the circuit, has the ability to quickly switch the circuit's on / off state. It can turn the circuit on and off in a very short time based on the control signal sent by the control module 1. When heating is required, the control module 1 sends a turn-on command to the high-speed electronic switch 8, which quickly turns on the circuit, allowing current to flow smoothly.

[0100] The LLC resonant circuit 9 is a circuit structure with specific resonant characteristics, composed of components such as inductors (L) and capacitors (C). After the circuit is turned on, the LLC resonant circuit 9 can efficiently convert and transmit the input electrical energy using its resonant characteristics. When current flows through the LLC resonant circuit 9, the inductors and capacitors in the circuit undergo periodic energy exchange, generating an alternating current of a specific frequency. This alternating current is then transmitted to the NFC coil 3, causing the NFC coil 3 to generate a magnetocaloric effect under the influence of the alternating magnetic field. The magnetocaloric effect refers to the phenomenon where, when a conductor is placed in an alternating magnetic field, eddy currents are generated inside the conductor due to electromagnetic induction. As these eddy currents flow through the conductor, due to the conductor's resistance, according to Joule's law, the eddy currents convert electrical energy into heat energy, thereby raising the temperature of the NFC coil 3 and the metal frame 201 and other components in close contact with it.

[0101] By sequentially connecting the high-speed electronic switch 8 and the LLC resonant circuit 9 to the NFC coil 3, the control module 1 can precisely control the start, stop, and power of the heating process. For example, when increased heating power is needed, the control module 1 can adjust the on-time of the high-speed electronic switch 8 or control the operating parameters of the LLC resonant circuit 9 to convert more electrical energy into heat energy. When the preset temperature threshold is reached, the control module 1 can promptly turn off the high-speed electronic switch 8 to stop the heating process, preventing damage to the equipment due to excessive temperature. This intelligent heating control mechanism not only improves energy efficiency but also ensures the safety and stability of the entire display device during the heating process.

[0102] In summary, the control module 1 is connected to the NFC coil 3 through two different electrical connection methods: the NFC chip 7 and the high-speed electronic switch 8 and the LLC resonant circuit 9. This enables short-range wireless communication and intelligent heating functions, providing strong technical support for the multi-functional and intelligent development of display devices.

[0103] Please refer to Figure 4 In one embodiment of this invention, the LCM component 202 adopts a multi-layer stacked design. This design integrates various optical and electronic materials to achieve a high-quality display effect. Specifically, the LCM component 202 includes a glass cover plate 2021, an optical adhesive layer 2022, a first polarizer 2023, a CF substrate 2024, a TFT substrate 2025, a second polarizer 2026, and a backlight module 2027, arranged sequentially. The structure of each layer is described in detail below:

[0104] The glass cover 2021 is located on the outermost layer of the LCM module 202. As the part that directly contacts the outside world, it plays a crucial role in protecting the internal components. The glass cover 2021 is typically made of high-strength, high-transparency glass material, possessing excellent wear resistance, scratch resistance, and impact resistance. It effectively prevents physical damage to the internal display structure from external objects, such as scratches and collisions. Simultaneously, its high transparency ensures that light can pass through smoothly without affecting the clarity and brightness of the displayed image.

[0105] An optical adhesive layer 2022 is disposed between the glass cover plate 2021 and the first polarizer 2023. It is an adhesive with special optical properties. The main function of the optical adhesive layer 2022 is to tightly bond the glass cover plate 2021 and the first polarizer 2023 together to form a single structure, preventing air gaps between them. Air gaps cause light to be reflected and refracted at the interface, thus affecting the display effect. By filling the gaps with the optical adhesive layer 2022, light loss and scattering can be effectively reduced, improving the contrast and color vibrancy of the image, making the displayed image clearer and more realistic.

[0106] The first polarizer 2023 is a thin-film material with special optical properties, allowing only light from a specific direction to pass through. In the LCM component 202, the function of the first polarizer 2023 is to polarize the light transmitted from the glass cover 2021, giving the light a specific polarization direction. This step is one of the key steps in realizing image display in liquid crystal display technology, laying the foundation for the subsequent modulation of light by liquid crystal molecules. Only light that has been polarized by the first polarizer 2023 can be controlled by an electric field in the subsequent liquid crystal layer to undergo corresponding optical changes.

[0107] The CF substrate 2024, or color filter substrate, is one of the core components for achieving color in liquid crystal displays. The CF substrate 2024 is covered with numerous tiny color filter units, typically including filters for the three primary colors: red (R), green (G), and blue (B). These color filter units are arranged in a specific pixel pattern on the substrate, corresponding one-to-one with the pixel electrodes on the TFT substrate 2025. When light passes through the liquid crystal layer and reaches the CF substrate 2024, the different color filters selectively transmit the light, thus decomposing the light modulated by the liquid crystal molecules into the three primary colors: red, green, and blue. Through different combinations and intensity variations of these three colors, rich and colorful images can be displayed on the screen.

[0108] The TFT substrate 2025, or thin-film transistor substrate, is the core control component of the LCM module 202. A large number of thin-film transistors and pixel electrodes are integrated on the TFT substrate 2025, with each pixel corresponding to one thin-film transistor. As switching elements, the thin-film transistors can precisely control the voltage on each pixel electrode according to control signals. When different voltages are applied to the pixel electrodes, a corresponding electric field is formed in the liquid crystal layer, thereby controlling the alignment direction of the liquid crystal molecules. Changes in the alignment direction of the liquid crystal molecules alter the light transmittance, thus achieving independent control of the brightness of each pixel. Through this precise control of each pixel, the LCM module 202 can display high-resolution, high-contrast images.

[0109] The second polarizer 2026, similar to the first polarizer 2023, is also a thin-film material with a specific polarization direction. However, the polarization direction of the second polarizer 2026 is perpendicular to that of the first polarizer 2023. After being modulated by the liquid crystal layer, the polarization direction of the light has changed. Only when the polarization direction of the light matches that of the second polarizer 2026 can the light pass through it. The function of the second polarizer 2026 is to re-polarize the light modulated by the liquid crystal layer, allowing only light with a specific polarization direction to pass through, thereby further enhancing the contrast of the displayed image, making blacks deeper and whites brighter, and improving the visual effect of the image.

[0110] The backlight module 2027 is located at the bottom of the LCM component 202, providing a uniform and stable light source for the entire display module. The backlight module 2027 typically consists of various optical films, such as light guide plates, diffusers, and brightness enhancement films. The light guide plate guides the light emitted from point or line light sources into surface light sources, ensuring uniform light distribution across the display area. The diffuser further diffuses the light, eliminating unevenness and making the brightness of the entire display image more uniform. The brightness enhancement film improves light utilization by reflecting light that has deviated from its normal direction back to the display area, thereby increasing the brightness of the display image. Through the synergistic effect of these optical films, the backlight module 2027 provides high-quality backlighting for the LCM component 202, ensuring clear visibility of the display image in various environments.

[0111] In summary, the LCM component 202, through its carefully designed multi-layered structure and collaborative operation, achieves high-quality image display capabilities and is widely used in various electronic devices, providing users with a clear, realistic, and colorful visual experience.

[0112] Please refer to Figure 5 In one embodiment of this invention, the display screen with heating function is further optimized and expanded in terms of structure and function design. In addition to the existing core components, a touch panel 4, a key component, is also integrated.

[0113] The touch panel 4 is precisely positioned on the front of the LCM component 202. In the overall layout of the display screen, the LCM component 202 serves as the core carrier for image display, responsible for presenting various visual information. The touch panel 4, positioned on its front, allows users to conveniently interact with the display screen while viewing the content. This layout conforms to ergonomic principles, greatly enhancing the convenience and intuitiveness of user operation.

[0114] A reliable electrical connection is established between the touch panel 4 and the control module 1. From a system architecture perspective, the control module 1, as the core control hub of the entire display screen, bears the important responsibility of coordinating the work of various components and processing various signals and instructions. The connection between the touch panel 4 and the control module 1 provides the physical basis for information interaction between the two.

[0115] In terms of functionality, the main function of the touch panel 4 is to receive user touch operations. When the user touches, slides, or clicks on the display surface, the touch panel 4 can accurately sense parameters such as the position, pressure, and duration of these operations and convert them into corresponding electrical signals. These electrical signals are then transmitted to the control module 1, which analyzes and processes these signals according to a preset program and algorithm.

[0116] Based on the user's touch operations received by the touch panel 4, the control module 1 can execute various control commands. One of these commands is the ability to control the NFC coil 3 for near-field wireless communication. In modern electronic devices, near-field wireless communication is increasingly important, enabling rapid data transfer between devices, convenient payments, identity verification, and many other applications. Through interaction with the touch panel 4, users can actively initiate NFC communication operations, such as transferring files with other NFC-enabled phones or making mobile payments using the display screen, thus meeting diverse usage needs.

[0117] On the other hand, the control module 1 can also utilize the magnetocaloric effect of the NFC coil 3 to heat the metal frame 201, thereby increasing the temperature of the LCM component 202. By triggering the NFC heating function through the touch panel 4, the control module 1 can precisely control the working state of the NFC coil 3 to generate an alternating magnetic field, which in turn causes the metal frame 201 to generate heat under the magnetocaloric effect. This heat is conducted to the LCM component 202, effectively increasing its temperature and ensuring that the display can maintain normal and stable display performance even in low-temperature environments.

[0118] It is worth noting that the NFC heating function in this embodiment has dual control modes. In addition to the automatic NFC heating function implemented by the MCU 101 in conjunction with the temperature sensing module 102, as described above, it also supports manual NFC heating via the touch panel 4. In automatic mode, the temperature sensing module 102 monitors the temperature of the LCM component 202 in real time and feeds the temperature data back to the MCU 101. When the temperature is below a preset threshold, the MCU 101 automatically controls the NFC coil 3 to heat the display screen to maintain it within a suitable operating temperature range. In manual mode, users can start or stop the NFC heating function at any time via the touch panel 4 according to their actual needs and subjective feelings, providing a more flexible and personalized operating experience. This dual control mode design fully considers the usage needs in different scenarios, further improving the intelligence level of the display screen and user satisfaction.

[0119] In one embodiment of this invention, in order to optimize the thermal management performance of the display screen and ensure the safety of critical components, a thermally conductive silicone pad is carefully provided between the inner surface of the metal frame 201 and the back and periphery of the LCM component 202.

[0120] From a thermal conductivity perspective, the thermally conductive silicone pad possesses excellent thermal conductivity characteristics. During the operation of the display, when the magnetocaloric effect of the NFC coil 3 is used to heat the metal frame 201 to increase the temperature of the LCM component 202, the metal frame 201 absorbs heat and its temperature rises. At this time, the thermally conductive silicone pad, with its good thermal conductivity, can build an efficient heat conduction channel between the metal frame 201 and the LCM component 202. It can quickly conduct heat from the metal frame 201 to the LCM component 202, significantly reducing heat loss during the transfer process, thereby further improving the heat conduction efficiency from the metal frame 201 to the LCM component 202. This efficient heat conduction helps the LCM component 202 reach its suitable operating temperature more quickly, ensuring stable and efficient operation under different ambient temperatures, providing users with a clear and smooth display.

[0121] Meanwhile, the thermally conductive silicone pad also plays an important role in buffering and protection. During the heating process, due to differences in material properties, the metal frame 201 and the LCM component 202 may experience varying degrees of thermal expansion. If this thermal expansion is not effectively buffered and controlled, it may lead to stress concentration between the two, causing mechanical damage to the LCM component 202, such as screen cracking or internal circuit damage. The thermally conductive silicone pad, with its good flexibility and elasticity, can act as a buffer between the metal frame 201 and the LCM component 202. When relative displacement or stress occurs between the two due to thermal expansion, the thermally conductive silicone pad can absorb and disperse this stress through its own deformation, effectively reducing the direct impact of stress on the LCM component 202. In addition, the thermally conductive silicone pad can also fill the tiny gaps between the metal frame 201 and the LCM component 202, making the connection between the two tighter and more stable, further enhancing the protection of the LCM component 202, preventing damage to the LCM component 202 due to thermal expansion and other factors during heating, thereby extending the lifespan of the display screen and improving the reliability and stability of the product.

[0122] In summary, placing a thermally conductive silicone pad between the inner surface of the metal frame 201 and the back and periphery of the LCM component 202 is an important design measure that combines thermal conduction optimization and mechanical protection, and is of great significance for improving the overall performance and reliability of the display screen.

[0123] Although this application uses terms such as control module and NFC coil frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0124] This utility model provides a display screen with a heating function. By expanding the function of its built-in NFC coil, it not only retains the short-range wireless communication function, but also uses the magnetocaloric effect in conjunction with the metal frame to achieve the heating function of the display screen. This effectively solves the problems of high cost, poor reliability, high power consumption and lack of intelligent control in the prior art, and significantly improves the performance and service life of the display screen in low-temperature environments. It has significant practicality and innovation.

[0125] Example 2

[0126] This utility model embodiment two provides a terminal device, including a display screen with heating function as provided in embodiment one above.

[0127] It should be noted that the design highlight of this terminal device lies in its integration of a heated display screen component, as detailed in Embodiment 1 above. This display screen not only possesses conventional display functions but also incorporates heating technology, thereby providing necessary heating support for the terminal device in specific environments to adapt to the needs of different usage scenarios and enhance user experience and device usability.

[0128] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A display screen having a heating function, characterized by, It includes a control module (1), an LCM display module (2), and an NFC coil (3); among which, The LCM display module (2) includes a metal frame (201) and an LCM component (202): The metal frame (201) is located on the back of the LCM component (202) and covers the periphery of the LCM component (202); The LCM component (202) is used to display image information; The control module (1) is electrically connected to the NFC coil (3) and is used to control the NFC coil (3) to perform near-field wireless communication, or to control the NFC coil (3) to heat the metal frame (201) using the magnetocaloric effect to increase the temperature of the LCM component (202).

2. The display screen with heating function according to claim 1, characterized in that, The NFC coil (3) is disposed on the back of the metal frame (201) away from the LCM component (202).

3. The display screen with heating function according to claim 1, characterized in that, It also includes the front shell (5); The front shell (5) is disposed on the back of the metal frame (201) away from the LCM component (202) and covers the periphery of the LCM display module (2); The NFC coil (3) is disposed on the side of the front shell (5) facing the metal frame (201).

4. The display screen with heating function according to claim 1, characterized in that, The control module (1) includes an MCU (101) and a temperature sensing module (102). The temperature sensing module (102) is electrically connected to the MCU (101) and is used to collect the temperature of the LCM component (202) and transmit it to the MCU (101). The MCU (101) is electrically connected to the NFC coil (3) and is used to control the NFC coil (3) to perform near-field wireless communication, or to control the NFC coil (3) to heat the metal frame (201) using the magnetocaloric effect when the temperature of the LCM component (202) is low, so as to increase the temperature of the LCM component (202).

5. The display screen with heating function according to claim 4, characterized in that, The temperature sensing module (102) is an NTC thermistor.

6. The display screen with heating function according to claim 5, characterized in that, The NTC thermistor is connected in series with a voltage divider resistor (6) and then electrically connected to the MCU (101).

7. The display screen with heating function according to claim 1, characterized in that, The control module (1) is electrically connected to the NFC coil (3) via the NFC chip (7) on one hand, and to the NFC coil (3) via the high-speed electronic switch (8) and the LLC resonant circuit (9) on the other hand.

8. The display screen with heating function according to claim 1, characterized in that, It also includes a touch panel (4); The touch panel (4) is disposed on the front of the LCM component (202); The touch panel (4) is connected to the control module (1) and is used to receive the user's touch operation to instruct the control module (1) to control the NFC coil (3) to perform near-field wireless communication, or to use the magnetocaloric effect to heat the metal frame (201) to increase the temperature of the LCM component (202).

9. The display screen with heating function according to claim 1, characterized in that, A thermally conductive silicone pad is provided between the inner surface of the metal frame (201) and the back and periphery of the LCM assembly (202).

10. A terminal device, comprising: Includes a display screen with heating function as described in any one of claims 1-9.

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