Mobile phone wireless charger with display screen

Abstract

The application provides a mobile phone wireless charger with a display screen, and relates to the technical field of wireless charging.The charger comprises a wireless charging body, an annular wireless charging coil and a wireless charging main control board arranged in the body, and the center of the annular wireless charging coil forms a non-coil hollow area.The display screen is arranged at the corresponding position of the non-coil hollow area and comprises a pixel dot matrix display structure composed of a plurality of RGB LED lamps;an anti-interference mechanism is arranged between the wireless charging main control board and the display screen to reduce the electromagnetic interference of the display screen on the wireless charging process.The display screen is arranged in the hollow area at the center of the annular coil, the spatial layout is optimized, the electromagnetic interference of the display screen on the wireless charging is effectively inhibited through the arrangement of the anti-interference mechanism, and the product stability and display effect are improved.

Description

Technical Field

[0001] This invention relates to the field of wireless charging equipment technology, and in particular to a wireless charger for mobile phones with a display screen. Background Technology

[0002] With the widespread adoption of smartphones and other portable devices, wireless charging technology has become widely used due to its convenience. Wireless chargers have become a standard consumer electronics product. However, as market competition intensifies, the limitations of traditional wireless chargers—such as limited functionality and similar appearance—are becoming increasingly apparent, making it difficult to meet consumers' growing demands for personalization and interactive experiences.

[0003] To enhance product appeal, some manufacturers have attempted to add lighting effects to the surface of wireless chargers. However, existing solutions typically only involve simple, colorful LED light strips around the edge or perimeter of the charger, resulting in a monotonous display, lack of dynamic content and personalized interaction. The technology is relatively simple, making it difficult to create genuine product differentiation.

[0004] In recent years, some solutions have attempted to integrate LED display modules onto the surface of wireless chargers to achieve richer display effects. However, existing technologies mainly suffer from the following shortcomings:

[0005] First, most solutions place the LED display module around the wireless charging coil, which directly leads to a significant increase in product size, compromising the charger's portability and aesthetics.

[0006] Secondly, a few solutions that attempt to place the display module in an unused area at the center of the coil face serious electromagnetic compatibility (EMC) issues. The strong alternating magnetic field generated during wireless charging induces currents and eddy currents on the copper traces and component pins of the display module's PCB. These interferences not only reduce charging efficiency and cause power fluctuations, but in severe cases, can even lead to intermittent charging or abnormal device recognition. Current technologies lack a systematic anti-interference solution for "coil-centered integrated displays."

[0007] Therefore, how to integrate a display screen with rich display functions into the center of the coil without increasing the product size, while effectively eliminating its impact on the performance of wireless charging, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0008] The purpose of this invention is to provide a wireless charger for mobile phones with a display screen, so as to solve the technical problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A wireless charger for mobile phones with a display screen, including a wireless charging body;

[0011] A ring-shaped wireless charging coil is disposed within the wireless charging body, and a non-coil cavity area is formed at the center of the ring-shaped wireless charging coil.

[0012] The wireless charging main control board is located inside the wireless charging body and is used to control the wireless charging function;

[0013] And a display screen, which is attached to the corresponding position of the non-coil void area, the display screen including a pixel matrix display structure composed of multiple RGB LEDs arranged in a row;

[0014] An anti-interference mechanism is provided between the wireless charging main control board and the display screen. The anti-interference mechanism is used to reduce the electromagnetic interference of the display screen to the wireless charging process.

[0015] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0016] In one alternative: the anti-interference mechanism includes a PCB non-closed loop structure, the redundant copper on the PCB of the display screen is removed, only the signal traces between the RGB LED and the driver chip are retained, and the unidirectional conduction characteristics of the diodes of the RGB LED are used to prevent the metal traces on the PCB from forming a complete closed conductive loop, thereby blocking the induced current circulation path.

[0017] In one alternative: the anti-interference mechanism includes a drive element avoidance layout structure, wherein the drive chip of the display screen is centrally arranged in the non-coil cavity area of ​​the annular wireless charging coil, completely avoiding the coil body area of ​​the annular wireless charging coil.

[0018] In one alternative: the anti-interference mechanism includes a charging status-linked power supply structure, the wireless charging main control board and the display screen are two independent PCBA boards, which are electrically connected only through a power line; the wireless charging main control board detects the charging status in real time and controls the power supply to the display screen synchronously according to the start and stop of charging.

[0019] In one alternative: the display screen is attached to the upper surface of the annular wireless charging coil and is located at the center of the annular magnet inside the wireless charging body.

[0020] A control method for a wireless charger for mobile phones with a display screen includes the following steps:

[0021] S1: System initialization, the wireless charging main control board monitors the current wireless charging working status in real time;

[0022] S2: When it is detected that the wireless charging function is not activated and the device is in standby mode, the wireless charging main control board continuously supplies power to the display screen, and the display screen runs a preset pixel animation program to perform dynamic display;

[0023] S3: When the activation of the wireless charging function is detected and the device enters the charging state, the wireless charging main control board immediately cuts off the power supply circuit of the display screen, the display screen stops working, and the interference of the display screen to the alternating magnetic field of wireless charging is eliminated.

[0024] S4: When the wireless charging function is detected to be off and the device returns to standby mode, the wireless charging main control board restores power to the display screen, and the display screen continues to run the animation display.

[0025] In one alternative: In step S3, the condition for activating the wireless charging function is: the wireless charging main control board detects the placement of the receiving device and the charging power continuously exceeds the set threshold; after activation, the power supply to the display screen is cut off within 100ms.

[0026] In one alternative: In step S4, the condition for determining that the wireless charging function is turned off is: the wireless charging main control board detects that the receiving device has been removed, or that charging has been completed and entered a trickle / stop state, and the duration exceeds a set threshold, and then restores the power supply to the display screen.

[0027] By adopting the above technical solution, the present invention has the following beneficial effects:

[0028] This invention fully utilizes the unused empty area at the center of the wireless charging coil to integrate a display screen, achieving a functional upgrade with "zero increase in volume." While maintaining its slim and portable design, the product gains dynamic display capabilities, significantly enhancing its aesthetic appeal and market differentiation.

[0029] This invention employs a triple-system design—"non-closed loop blocking induced current + component avoidance to reduce magnetic field cutting + synchronized power-off during charging for complete isolation"—to comprehensively eliminate the impact of the display screen on wireless charging from three levels: interference generation, conduction path, and operating state. Testing has shown that the charger of this invention achieves the same core performance indicators as conventional wireless chargers without a display screen, including charging efficiency, power stability, and recognition sensitivity.

[0030] This invention employs a dual independent PCBA board design, requiring only two power lines for connection, eliminating complex communication protocols and interfaces. The PCB copper removal and component avoidance are optimizations at the routing layout level, requiring no additional expensive components. While achieving significant functional upgrades, the increase in material costs is controllable, resulting in excellent economic efficiency for mass production.

[0031] The overall solution of this invention is compatible with mainstream circular wireless charging coils on the market, and is suitable for various mobile phone wireless charger products, with good versatility and promotional value. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of a wireless charger with a display screen according to one embodiment of the present invention.

[0034] Figure labeling: 1. Wireless charging body; 2. Ring wireless charging coil; 4. Display screen; 5. Ring magnet; 6. Wireless charging main control board; 7. Driver chip. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0037] Example 1: A wireless charger for mobile phones with a display screen

[0038] like Figure 1 As shown, this embodiment provides a wireless charger for mobile phones with a display screen, including a wireless charger body 1, a ring-shaped wireless charging coil 2, a wireless charging main control board 6, a display screen 4, and a ring magnet 5.

[0039] The annular wireless charging coil 2 is fixedly installed inside the wireless charging body 1, using a conventional circular winding process. The inner diameter of the coil is approximately 43mm, with a non-coil cavity area 3 formed in the center. The annular magnet 5 is coaxially arranged around the coil to attract and position the mobile phone to be charged.

[0040] The display screen 4 (i.e., the matrix LED screen) is attached to the upper surface of the ring-shaped wireless charging coil 2, completely located within the non-coil cavity area 3 and at the center of the ring magnet 5. The overall diameter of the PCB of the display screen 4 is 42.8mm, precisely matching the unused space at the center of the coil. The display screen 4 consists of 333 RGB LEDs evenly arranged in a 21-row × 21-column dot matrix display structure, enabling rich color dynamic displays.

[0041] To achieve stable coexistence between the display screen 4 and the wireless charging function, this embodiment sets up a triple anti-interference mechanism between the wireless charging main control board 6 and the display screen 4:

[0042] 1. PCB non-closed loop design

[0043] The PCB board of display screen 4 adopts a non-redundant copper plating process, with no large areas of copper plating on the top and bottom layers. Only the necessary point-to-point signal traces and power traces between the RGB LEDs and the driver chip are retained. At the same time, by utilizing the unidirectional conduction characteristic of the RGB LEDs themselves, the metal traces on the PCB board cannot form a complete closed conductive loop. When the alternating magnetic field of wireless charging passes through the LED board, no induced circulating current can be generated due to the lack of a closed loop, thus fundamentally avoiding eddy current loss of magnetic field energy.

[0044] 2. Drive component avoidance layout

[0045] The driving circuit of display screen 4 uses seven 36-pin LED driver chips 7 to drive a 21×21 pixel matrix through row and column scanning. All driver chips 7 and their peripheral resistors and capacitors are arranged in the center area of ​​the back of the PCB board (within the area of ​​non-coil hole 3), completely avoiding the magnetic field coverage area of ​​the main body of the ring wireless charging coil 2, thus reducing the cutting interference of the metal components of the driver chip 7 on the alternating magnetic field.

[0046] 1. Dual-board independent + linked power-off design

[0047] The wireless charging main control board 6 and the display screen 4 are two independent PCBA boards, electrically connected only by two power lines (VCC and GND), with no data communication lines, minimizing the influence of metal traces on the magnetic field. The wireless charging main control board 6 has a built-in charging status detection circuit and a MOSFET power supply switch circuit, which can synchronously control the power supply to the display screen 4 according to the charging status.

[0048] The wireless charging main control board 6 adopts a conventional wireless charging control chip (such as IDTP9038 or equivalent solution), and realizes basic wireless charging functions such as Qi protocol recognition, power adjustment, and foreign object detection, as well as power supply control function of display screen. The overall structure is simple and highly integrated.

[0049] Example 2: Display Screen Control Method

[0050] like Figure 1 As shown, this embodiment provides a low-interference control method for the wireless charger described in Embodiment 1, and the specific steps are as follows:

[0051] Step S1: Initialize standby

[0052] After the device is powered on, the system completes initialization, and the wireless charging main control board 6 enters standby detection mode, supplying power to the display screen 4 by default. The display screen 4 runs the built-in preset standby animation (such as flowing starlight or breathing light effect) for dynamic display.

[0053] Step S2: Real-time monitoring of charging status

[0054] The wireless charging main control board 6 detects changes in coil resonance parameters and power in real time to determine whether a receiving device conforming to the Qi protocol is placed and whether the charging function should be activated.

[0055] Step S3: Charging activation power off

[0056] When the receiving device is detected and the charging power stably exceeds the set threshold (e.g., 1W), the charging function is activated. The main control board 6 immediately triggers the power switch, cutting off the power supply circuit to the display screen 4 within 100ms. The display screen 4 instantly turns off, and all LEDs and driver chips stop working, completely eliminating any interference with the charging magnetic field and ensuring a stable and efficient charging process.

[0057] Step S4: Charging complete and power restored

[0058] When the receiver device is detected to have been removed, and this idle state continues for more than a set threshold (e.g., 2 seconds), the charging function is determined to be off. The main control board 6 resumes power supply to the display screen 4, and the display screen 4 resumes the standby animation, returning to the normal display state.

[0059] Through the above control logic, the perfect effect of "zero interference during charging and display during standby" is achieved, balancing charging performance and product interaction experience.

[0060] Effect verification

[0061] The product of this embodiment was compared with a conventional wireless charger of the same specifications but without a display screen. The results are as follows:

[0062] Charging efficiency comparison: At 5W, 10W and 15W power levels, the charging efficiency of this product deviates from that of conventional wireless chargers by ≤±3%, with no significant performance degradation.

[0063] Charging stability: After 2 hours of continuous charging, the charging power curve is smooth with no abnormal fluctuations, disconnections, or identification problems. The stability is completely consistent with that of conventional wireless chargers.

[0064] Charging compatibility: Charging compatibility with mainstream brand mobile phones is no different from that of regular wireless charging.

[0065] Display effect: In standby mode, the display screen 4 has smooth animation, uniform color, and sufficient brightness, and the visual effect is significantly better than the traditional peripheral colorful light strip solution.

[0066] Cost comparison: The overall material cost increase is about 8-12%, which is far lower than that of the external independent display solution, and has good mass production feasibility.

[0067] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A wireless charger for mobile phones with a display screen, characterized in that, Includes the wireless charging unit; A ring-shaped wireless charging coil is disposed within the wireless charging body, and a non-coil cavity area is formed at the center of the ring-shaped wireless charging coil. The wireless charging main control board is located inside the wireless charging body and is used to control the wireless charging function; And a display screen, which is attached to the corresponding position of the non-coil void area, the display screen including a pixel matrix display structure composed of multiple RGB LEDs arranged in a row; An anti-interference mechanism is provided between the wireless charging main control board and the display screen. The anti-interference mechanism is used to reduce the electromagnetic interference of the display screen to the wireless charging process.

2. The wireless charger for mobile phones with a display screen according to claim 1, characterized in that, The anti-interference mechanism includes a PCB non-closed loop structure. The redundant copper on the PCB of the display screen is removed, and only the signal traces between the RGB LED and the driver chip are retained. The unidirectional conduction characteristics of the diodes of the RGB LED are utilized to prevent the metal traces on the PCB from forming a complete closed conductive loop, thereby blocking the induced current circulation path.

3. The wireless charger for mobile phones with a display screen according to claim 1, characterized in that, The anti-interference mechanism includes a drive element avoidance layout structure, in which the drive chip of the display screen is centrally arranged in the non-coil cavity area of ​​the annular wireless charging coil, completely avoiding the coil body area of ​​the annular wireless charging coil.

4. The wireless charger for mobile phones with a display screen according to claim 1, characterized in that, The anti-interference mechanism includes a charging status linkage power supply structure. The wireless charging main control board and the display screen are two independent PCBA boards, which are electrically connected only through a power line. The wireless charging main control board detects the charging status in real time and controls the power supply to the display screen synchronously according to the start and stop of charging.

5. The wireless charger for mobile phones with a display screen according to claim 1, characterized in that, The display screen is attached to the upper surface of the annular wireless charging coil and is located at the center of the annular magnet inside the wireless charging body.

6. A control method for a wireless charger with a display screen as described in any one of claims 1-5, characterized in that, Includes the following steps: S1: System initialization, the wireless charging main control board monitors the current wireless charging working status in real time; S2: When it is detected that the wireless charging function is not activated and the device is in standby mode, the wireless charging main control board continuously supplies power to the display screen, and the display screen runs a preset pixel animation program to perform dynamic display; S3: When the activation of the wireless charging function is detected and the device enters the charging state, the wireless charging main control board immediately cuts off the power supply circuit of the display screen, the display screen stops working, and the interference of the display screen to the alternating magnetic field of wireless charging is eliminated. S4: When the wireless charging function is detected to be off and the device returns to standby mode, the wireless charging main control board restores power to the display screen, and the display screen continues to run the animation display.

7. The control method for a wireless charger with a display screen according to claim 6, characterized in that, In step S3, the condition for activating the wireless charging function is: the wireless charging main control board detects the placement of the receiving device and the charging power continuously exceeds the set threshold; after activation, the power supply to the display screen is cut off within 100ms.

8. The control method for a mobile phone wireless charger with a display screen according to claim 6, characterized in that, In step S4, the condition for determining that the wireless charging function is turned off is: the wireless charging main control board detects that the receiving device has been removed, or that the charging has been completed and entered the trickle / stop state, and the duration exceeds the set threshold, and then restores the power supply to the display screen.

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