Wireless charging multicolor display circuit and device

Abstract

The utility model relates to wireless charging technical field especially relates to a kind of wireless charging multicolor display circuit and device, including wireless charging receiving module, three-color lamp indicating module, microcontroller unit and vibration sensor module, wireless charging receiving module input end connects external wireless charger output end, output end connects microcontroller unit, for receiving charging energy and feedback information, three-color lamp indicating module is made of multiple groups of parallel and each containing a branch of three-color LED, all connect microcontroller unit, can realize multicolor display, directly present multiple states such as charging, vibration sensor module vibration sensor signal output end is connected with microcontroller unit, can detect vibration and feedback.The utility model integrates wireless charging, multicolor display and vibration detection function, provides more abundant and intuitive information display for user, improves use experience.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, and in particular to a wireless charging seven-color display circuit and device. Background Technology

[0002] With the development of technology, wireless charging technology has been widely applied to various small electronic devices. Especially in the leisure and entertainment field, a variety of wireless charging devices allow users to enjoy mobile experiences more conveniently. These devices typically need to possess certain decorative and personalized functions to meet the specific needs of different occasions and users. When the device is designed for use in confined spaces, such as within jewelry, its small size must be considered, and it needs to flash different colors in different situations, such as yellow, red, or purple. Therefore, a wireless charging seven-color display circuit capable of being installed in confined spaces is proposed. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a wireless charging seven-color display circuit and device.

[0004] The first aspect of this utility model discloses a wireless charging seven-color display circuit, the circuit comprising: a wireless charging receiver module, a tri-color indicator module, a microcontroller unit, and a vibration sensor module; wherein the input terminal of the wireless charging receiver module is connected to the output terminal of an external wireless charger, and the output terminal is connected to the microcontroller unit; the tri-color indicator module is composed of multiple sets of parallel LED branches, each set of LED branches containing one tri-color LED, and each set of LED branches is connected to the microcontroller unit; the vibration sensor module includes a vibration sensor, and the signal output terminal is connected to the microcontroller unit.

[0005] In one optional embodiment, the wireless charging receiver module includes a wireless charging management chip and a matching inductor, a Schottky diode, and a filter capacitor; the matching inductor and the Schottky diode are connected in series to the input pin of the wireless charging management chip, the output pin of the wireless charging management chip is connected to the positive terminal of the rechargeable lithium battery, and the ground pins are common to ground; the filter capacitor includes a first capacitor and a second capacitor, the first capacitor and the second capacitor are connected in parallel to ground, the first capacitor is positioned close to the output pin of the wireless charging management chip, and the second capacitor is positioned close to the ground pin of the wireless charging management chip.

[0006] In an optional implementation, the anode of each LED branch is connected to the microcontroller unit via a current-limiting resistor, and the cathode is grounded.

[0007] In an optional implementation, each group of LED branches is connected in reverse parallel with a protection diode.

[0008] In one optional implementation, the power supply pin of the microcontroller unit is connected to the output of the wireless charging receiver module to obtain power, and the ground pin is grounded; and multiple IO pins of the microcontroller unit are respectively connected to the control terminal of the tri-color indicator module and the signal output terminal of the vibration sensor module.

[0009] In one optional implementation, the signal output terminal of the vibration sensor module is connected to the microcontroller unit via a voltage divider resistor.

[0010] The second aspect of this utility model provides a wireless charging seven-color display device, wherein the device is equipped with the aforementioned wireless charging seven-color display circuit. The wireless charging seven-color display circuit and device proposed in this utility model have at least one of the following technical effects: 1. In terms of the composition of each module, it only includes a wireless charging receiver module, a three-color indicator module, a microcontroller unit, and a vibration sensor module. The module structure is relatively simple and there are no redundant parts. This simple module design is conducive to the miniaturization of the overall circuit, so that it can be installed in a small space, such as in the small space of gold and silver jewelry, thus meeting the needs of installing wireless charging devices in a small space.

[0011] 2. The tri-color indicator module consists of three sets of parallel LED branches, each containing one tri-color LED. The tri-color LEDs can emit different colors of light. Through the microcontroller unit's control of the tri-color indicator module, a seven-color display effect can be achieved, adding a decorative touch to the equipment. It can present diverse color changes according to different occasions and user preferences, satisfying users' needs for both decorative and personalized equipment.

[0012] 3. The input terminal of the wireless charging receiver module connects to the output terminal of an external wireless charger, and the output terminal connects to the microcontroller unit, enabling normal wireless charging functionality and ensuring the basic performance of the device. The vibration sensor module contains a vibration sensor, whose signal output terminal is connected to the microcontroller unit. The vibration sensor detects the device's vibration, and the microcontroller unit processes the vibration signal accordingly, enriching the device's functionality and improving the user experience. Furthermore, these functions are implemented on a miniaturized circuit basis, without affecting the device's portability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a wireless charging seven-color display circuit shown in an embodiment of this utility model; Figure 2This is a circuit diagram of a wireless charging seven-color display circuit shown in an embodiment of the present invention; Figure 3 This is a circuit diagram of a wireless charging receiver module shown in an embodiment of the present invention; Figure 4 This is a circuit diagram of a tri-color indicator module shown in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a microcontroller unit shown in an embodiment of the present invention. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0016] Reference Figure 1 The diagram shown is a schematic representation of a wireless charging seven-color display circuit according to an embodiment of this utility model, used to achieve different color display functions in gold and silver jewelry. The diagram illustrates the design of several key modules involved in the wireless charging seven-color display circuit of this utility model, including a wireless charging receiver module, a three-color indicator module, a microcontroller unit, and a vibration sensor module. These are described in detail below: The input terminal of the wireless charging receiver module is connected to the output terminal of an external wireless charger, and the output terminal is connected to the microcontroller unit.

[0017] The wireless charging receiver module is responsible for receiving the electrical energy output from the external wireless charger and converting it into a form of electrical energy that can be used by the internal device.

[0018] Refer to together Figure 2 and Figure 3The wireless charging receiver module consists of a wireless charging management chip XKT-R003 (SOT23-6 package), a matching inductor L1 (100μH, CD73 package), a Schottky diode D1 (IN5819, SOD123 package), and filter capacitors (including a first capacitor C1 (10μF, 0402 package) and a second capacitor C2 (2.2nF, NPO material, 0402 package)). Inductor L1 receives the wireless charging electromagnetic signal, and diode D1 performs rectification. Inductor L1 and diode D1 are connected in series to the input pin (IN) of XKT-R003. The output pin (OUT) of XKT-R003 is connected to the positive terminal of the rechargeable lithium battery (i.e., lithium button cell BAT), and the ground pin (GND) is common to the ground. Furthermore, the first capacitor C1 and the second capacitor C2 are connected in parallel to ground. C1 is placed near the output pin (OUT) of the XKT-R003, and C2 is placed near the chip ground pin (GND) to stabilize the output voltage of 4.2V and suppress high-frequency noise.

[0019] The lithium button battery is connected to the wireless charging management chip and microcontroller unit (MCU) through a two-pin interface (TP+ / TP-). The positive terminal of the battery is soldered to TP+ and the negative terminal is grounded with TP-, ensuring the independence of the charging and power supply circuits.

[0020] The tri-color indicator module consists of three sets of parallel LED branches, each set of LED branches contains one tri-color LED, and each set of LED branches is connected to the microcontroller unit.

[0021] Refer to together Figure 2 and Figure 4 The tri-color indicator module consists of three sets of parallel LED branches, each set containing a red / green / blue tri-color LED (D1, 0603 package), to achieve mixed display of seven colors.

[0022] Each LED is connected in series with a current-limiting resistor (R1-R3, 100Ω, 0402 package) to prevent current overload. Additionally, each LED branch has a protection diode (0603 package) connected in parallel in reverse to prevent reverse current surges and protect the LEDs and driver circuitry.

[0023] The LEDs are independently controlled via the I / O pins (P30-P32) of a microcontroller unit (MCU). Specifically, the anodes of the red, green, and blue LEDs are connected to the MCU's I / O pins P30, P31, and P32 respectively via current-limiting resistors, while the cathodes share a common ground. The MCU controls the LED brightness and color combination by outputting a high-level signal or a PWM signal. For example: red (P30 high, P31 / P32 low); green (P30 / P31 high simultaneously, P32 low).

[0024] In some embodiments, the microcontroller unit (MCU) is responsible for the logic control of the entire circuit and handles tasks such as wireless power supply, LED display, and vibration sensor signals.

[0025] Refer to together Figure 2 and Figure 5 The microcontroller unit (MCU) uses the 8G1K08A chip (DFN8 3*3 package), featuring a low-power design suitable for portable devices. Its power supply pin (VCC) connects to the output (TP+) of the wireless charging module, and its ground pin (GND) is common to the ground. It is connected to the tri-color LED module via I / O pins P30-P32, with P33-P35 reserved for expansion. A designated I / O pin (e.g., P54) connects to the signal output of the vibration sensor module to receive vibration trigger signals.

[0026] The MCU's IO pins (P30-P32) control the brightness and color mixing ratio of the three-color LEDs through high-level or PWM signals to achieve seven color display combinations. The brightness of each color is determined by the resistance values ​​of current-limiting resistors R1-R3 and the PWM duty cycle.

[0027] The vibration sensor module includes a vibration sensor, and its signal output terminal is connected to the microcontroller unit.

[0028] The vibration sensor module detects external vibration signals and controls the currently displayed color based on vibrations of a specific frequency. (See also...) Figure 2 The vibration sensor module comprises a vibration sensor U3 (0805 package) and voltage divider resistors (including a first resistor R4 (51kΩ, 0402 package) and a second resistor R6 (100Ω, 0402 package)). The vibration sensor detects external mechanical vibrations, and the first resistor R4 and the second resistor R6 adjust the signal level to match the MCU input threshold. The sensor signal output is connected to the MCU's ADC pin or digital input pin after being divided by the first resistor R4 and the second resistor R6, and both grounding terminals share a common ground to ensure signal stability. Specifically, the first resistor R4 and the second resistor R6 are connected in series and then grounded. The vibration sensor signal output is connected to the midpoint between R4 and R6, and the voltage division ratio is adjusted to match the MCU's input threshold.

[0029] In some embodiments, when the vibration sensor module does not detect a valid vibration signal within 30 seconds, the MCU enters a low-power mode, controlling the tri-color LED module to enter a sleep mode (e.g., turning off the tri-color LED module), maintaining only the wireless charging receiver module's operation. Simultaneously, the MCU can set a specific vibration sequence to control the tri-color LED module's color switching. For example, using "three short vibrations + one long vibration + three short vibrations" as the trigger signal, with subsequent 1-7 short vibrations serving as color selection instructions, the MCU adjusts the tri-color LED output combination according to the instructions. Therefore, the power-saving vibration sensor module achieves display color setting through a specific frequency, eliminating the need for a human-machine interface to set the desired display color.

[0030] It should be noted that the circuit adopts a multi-layer PCB layout, with the wireless charging receiver module placed on the bottom layer to reduce electromagnetic interference, the MCU and vibration sensor module placed in the center, and the tri-color indicator module located on the top layer and away from the charging management chip. The overall package size can be installed in a small space, such as a cylindrical space with a diameter of 10.2mm and a height of 11mm.

[0031] The working principle of this invention is as follows: When the wireless charging seven-color display circuit is working, the wireless charging receiver module receives power from the external wireless charger, converts it, and charges the lithium button battery while simultaneously powering the circuit. The three-color indicator module is independently controlled via the I / O pins of the microcontroller unit (MCU). The MCU outputs a high-level or PWM signal to control the LED brightness and color combination, achieving seven-color display. The vibration sensor module senses external vibration signals, adjusts the signal level via a voltage divider resistor, and transmits it to the MCU, which then controls the color switching accordingly.

[0032] This invention, through a wired charging receiver module, a three-color indicator module, a microcontroller unit, and a vibration sensor module, enables the wireless charging seven-color display circuit to achieve a display effect of up to seven colors in a confined space. This not only improves the user experience but also enables its application in jewelry and other decorative items. Consumers can set different colors to be displayed on the product according to different occasions and requirements, thereby enhancing the decorative and personalized functions of the product.

[0033] In one optional embodiment, the present invention provides a wireless charging color display device, which is equipped with the above-mentioned wireless charging color display circuit.

[0034] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. A wireless charging seven-color display circuit, characterized in that, The circuit includes: a wireless charging receiver module, a tri-color indicator module, a microcontroller unit, and a vibration sensor module; wherein the input terminal of the wireless charging receiver module is connected to the output terminal of an external wireless charger, and the output terminal is connected to the microcontroller unit; the tri-color indicator module consists of multiple sets of parallel LED branches, each set of LED branches contains tri-color LEDs, and each set of LED branches is connected to the microcontroller unit; the vibration sensor module contains a vibration sensor, and its signal output terminal is connected to the microcontroller unit.

2. The wireless charging seven-color display circuit according to claim 1, characterized in that, The wireless charging receiver module includes a wireless charging management chip and a matching inductor, a Schottky diode, and a filter capacitor. The matching inductor and the Schottky diode are connected in series to the input pin of the wireless charging management chip. The output pin of the wireless charging management chip is connected to the positive terminal of the rechargeable lithium battery, and the ground pins are common to the ground. The filter capacitor includes a first capacitor and a second capacitor. The first capacitor and the second capacitor are connected in parallel to the ground. The first capacitor is positioned close to the output pin of the wireless charging management chip, and the second capacitor is positioned close to the ground pin of the wireless charging management chip.

3. The wireless charging seven-color display circuit according to claim 1, characterized in that, The anode of each LED branch is connected to the microcontroller unit through a current-limiting resistor, and the cathodes are grounded.

4. The wireless charging seven-color display circuit according to claim 1, characterized in that, Each LED branch is connected in reverse parallel with a protection diode.

5. The wireless charging seven-color display circuit according to claim 1, characterized in that, The power supply pin of the microcontroller unit is connected to the output of the wireless charging receiver module to obtain power, and the ground pin is grounded; and multiple IO pins of the microcontroller unit are respectively connected to the control terminal of the tri-color indicator module and the signal output terminal of the vibration sensor module.

6. The wireless charging seven-color display circuit according to claim 1, characterized in that, The signal output terminal of the vibration sensor module is connected to the microcontroller unit through a voltage divider resistor.

7. A wireless charging seven-color display device, characterized in that, It is equipped with a wireless charging seven-color display circuit as described in any one of claims 1-6.

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