Small display module and electronic product

Abstract

The utility model discloses a small display module and an electronic product, the small display module is used for expanding an XIAO series development board, the XIAO series development board comprises a control module, the small display module comprises an RTC circuit used for providing time information for the XIAO series development board, an FPC connector used for being connected with a circular touch display screen, and an SD card connector used for being connected with an SD card, the small display module at least comprises a first power supply used for supplying power to the XIAO series development board, a second power supply used for supplying power to the RTC circuit, and a dial switch used for controlling IO signal connection of the control module. Meanwhile, power can be supplied through an external lithium ion battery, a button battery and the like, the expansibility is enhanced, and the device has the advantages of being small in size, visual, large in storage space, convenient to carry and high in universality and is suitable for various products of the internet of things.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a small display module and an electronic product. Background Art

[0002] With the advancement of technology, embedded devices are moving towards miniaturization. Therefore, the existing technology has produced XIAO series development boards, which integrate MCU and peripheral circuits required for MCU operation in a smaller volume. XIAO series products even support Wi-Fi, BLE, NFC, and TinyML products, making it convenient for customers to use XIAO series products to develop small embedded devices.

[0003] The existing XIAO series products are powerful small development boards, but they are limited by their size, have insufficient peripherals, lack of visualization functions, and small storage space, and cannot bring out their powerful performance. Utility Model Content

[0004] In view of the above technical problems, the utility model provides a small display module and an electronic product with small size and strong portability.

[0005] One embodiment of the utility model provides a small display module for expanding the XIAO series development board, the XIAO series development board includes a control module, the small display module includes an RTC circuit for providing time information to the XIAO series development board; an FPC connector for connecting a circular touch display screen; an SD card connector for plugging an SD card; a power module, the power module at least includes a first power supply for powering the XIAO series development board and a second power supply for powering the RTC circuit; a dip switch for controlling the IO signal connection of the control module.

[0006] Optionally, the first power supply includes a 5V power supply and a 3.3V power supply.

[0007] Optionally, the second power supply includes a button battery holder for connecting a button battery to power the RTC circuit.

[0008] Optionally, the power module further includes a third power source, and the third power source includes a lithium battery connector for connecting a lithium-ion battery.

[0009] Optionally, a power management module is also included, and the power management module is connected to the lithium-ion battery and is used to control the charging of the lithium-ion battery.

[0010] Optionally, the power management module includes a step-down circuit for stepping down the voltage of the power module to 3.3V to supply power to the RTC circuit, the FPC connector and the SD card connector, and the step-down circuit is a DC-DC step-down circuit.

[0011] Optionally, a toggle switch is further included, and the toggle switch is connected to the step-down circuit to control the power supply of the small display module.

[0012] Optionally, a voltage acquisition module is also included to read the voltage across the lithium-ion battery.

[0013] Optionally, the button battery is a CR927 standard button battery.

[0014] Another embodiment of the present invention further provides an electronic product, comprising any of the above-mentioned small display modules.

[0015] In the technical solution provided by the embodiment of the utility model, the small display module is used to expand the XIAO series development board, the XIAO series development board includes a control module, the small display module includes an RTC circuit for providing time information to the XIAO series development board, an FPC connector for connecting a circular touch screen, an SD card connector for plugging an SD card, a first power supply for powering the XIAO series development board and a second power supply for powering the RTC circuit, and a dip switch for controlling the IO signal connection of the control module. Compared with the prior art, the small display module of the utility model is small in size, and integrates multiple functions such as clock circuit, power management function, and display function. At the same time, it can be powered by external lithium-ion batteries, button batteries, etc. to enhance the expandability. It has the advantages of small size, visualization, large storage space, easy to carry, and strong versatility, and is suitable for a variety of Internet of Things products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the overall circuit of a small display module.

[0017] Figure 2 The utility model is a schematic diagram of a power management module of a small display module.

[0018] Figure 3 The utility model is a schematic diagram of a step-down circuit of a small display module. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0020] It should be noted that when an element is described as being "connected" or "connected to" another element, it may be directly connected to the other element, or one or more intermediate elements may exist therebetween. The terms "upper", "lower", "inner", "outer", etc. used in this specification indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention.

[0021] As the world's leading electronic open source hardware platform, Seeed has been deeply involved in the fields of IoT and AI for many years and has profound accumulation. This product is a stable, easy-to-use, and low-cost development board launched in this context. It takes the XIAO series development board as the core, combines TinyML, Wi-F, and BLE Internet of Things, and is very suitable for wearable and Internet of Things applications, and is naturally adapted to TinyML machine learning. The XIAO series development board integrates MCU and the peripheral circuits required for MCU operation. Some models support Wi-Fi, BLE, NFC, and TinyML functions.

[0022] This utility model provides a small display module for expanding the functions of the XIAO series development board. Please refer to Figure 1 As shown, the small display module includes a clock circuit (RTC circuit), a flexible circuit board connector (FPC connector), an SD card connector, a power module and a dip switch, wherein the RTC circuit is used to provide time information to the XIAO series development board, the FPC connector is used to connect the circular touch display screen, the SD card connector is used to plug the SD card, and the collected data information is stored in the SD card, the power module includes at least a first power supply for powering the XIAO series development board and a second power supply for powering the RTC circuit; the dip switch is used to control the IO signal connection of the control module.

[0023] In one embodiment of the utility model, the first power supply includes a 5V power supply and a 3.3V power supply for powering the XIAO series development board. The second power supply can be a dry cell battery or a button cell battery holder for connecting a button cell to power the RTC circuit. The button cell is a CR927 standard button cell. The power module also includes a third power supply, which can be a lithium battery connector for connecting a rechargeable lithium-ion battery, which can be charged through a type-c interface.

[0024] In one embodiment of the utility model, the small display module also includes a power management module, and the power management module also includes a step-down circuit. One end of the power management module is connected to a 5V power supply and a lithium battery connector, and the other end is connected to the step-down circuit for controlling the charging of the lithium-ion battery. The step-down circuit is connected to the lithium battery connector and the power management module, and is used to reduce the 5V power supply voltage and the lithium-ion battery voltage to 3.3V.

[0025] In one embodiment of the present invention, the step-down circuit further includes a step-down switch, which is connected to the step-down circuit and is used to control the on-off of the step-down circuit.

[0026] In one embodiment of the utility model, the small display module also includes a toggle switch and a voltage acquisition module. The toggle switch is connected to the step-down circuit through the step-down switch. The toggle switch is also connected to the voltage acquisition module. The toggle switch is used to control the power supply of the small display module, and the voltage acquisition module is used to read the voltage across the lithium-ion battery.

[0027] In one embodiment of the present invention, please refer to Figure 1 As shown, the RTC circuit is respectively connected to a 3.3V power supply, a button battery holder and an FPC connector, the FPC connector is used to connect a circular touch screen, and the FPC connector is also connected to an SD card connector. The RTC circuit and the FPC connector communicate with the XIAO series development board via the I2C bus, and the FPC connector and the SD card connector communicate with the XIAO series development board via the SPI bus.

[0028] The utility model is aimed at IoT development scenarios such as embedded development and wearable devices. The small display module is small in size and integrates multiple functions such as clock circuit, power management function, display function, etc. At the same time, the expandability can be enhanced by external lithium-ion batteries, button batteries, etc. It has the advantages of small size, visualization, large storage space, easy to carry, and strong versatility, and is suitable for a variety of IoT products.

[0029] Please refer to Figure 2 The circuit diagram of the power management module of the utility model is shown, wherein the power management module adopts a battery charging management chip U2 of model ETA4054S2, the VIN pin of the battery charging management chip U2 is connected to the USB-5V power supply, and the VIN pin of the battery charging management chip U2 is also grounded through the capacitor CI. The ISEN pin of the battery charging management chip U2 is grounded through the resistor R2, and the VSS pin of the battery charging management chip U2 is grounded. The CHG pin of the battery charging management chip U2 is connected to the USB-5V power supply through the light-emitting diode D1 and the resistor R6 in turn. The BAT pin of the battery charging management chip U2 is grounded through the capacitor C5.

[0030] The USB-5V power supply is respectively connected to the diode D2, the capacitor C3, the resistor R3, one end of the diode D7 and the first end of the MOS tube Q6, the diode D7 is an electrostatic diode, and the other ends of the capacitor C3, the resistor R3 and the diode D7 are respectively grounded. The other end of the diode D2 is connected to the third end of the MOS tube Q6, and the other end of the diode D2 is also grounded through the capacitor C2 and the capacitor C9.

[0031] In one embodiment of the present invention, the step-down circuit is a DC-DC step-down circuit. Figure 3 The figure shows a circuit diagram of a buck circuit. The buck chip adopts a buck converter chip U1 of model ETA3410. The PVIN pin and AVIN pin of the buck converter chip U1 are respectively connected to one end of capacitor C7 and capacitor C8, and the other ends of capacitor C7 and capacitor C8 are grounded. The MODE pin, PAD pin, AGND pin and PGND pin of the buck converter chip U1 are grounded. The EN pin of the buck converter chip U1 is respectively connected to one end of the buck switch, one end of the resistor R1, one end of the capacitor C22 and one end of the resistor R5. The other ends of the resistor R1 and the capacitor C22 are grounded. The other end of the resistor R5 is respectively connected to one end of the capacitor C23 and one end of the resistor R21, and the first end of the MOS tube Q2. The other ends of the capacitor C23 and the resistor R21 are grounded. The second end of the MOS tube Q2 is grounded. The third end of the MOS tube Q2 is respectively connected to one end of the resistor R13 and the first end of the MOS tube Q3 through the resistor R9. The first end, the other end of the resistor R13 and the second end of the MOS tube Q3 are respectively connected to a 3.3V power supply, the third end of the MOS tube Q3 is respectively connected to capacitors C21, C11, C10, C25, an inductor L2 and one end of the resistor R8, the other ends of the capacitors C21, C11, C10 are grounded, the other ends of the capacitor C25 and the resistor R8 are grounded through a resistor R34, the other end of the inductor L2 is connected to the SW pin of the buck converter chip U1, and the FB pin of the buck converter chip U1 is connected to the other ends of the capacitor C25 and the resistor R8.

[0032] The embodiment of the present application is designed to be compatible with seeeduino xiao, supports power management function, and can charge lithium-ion batteries. The present invention has low cost, short development cycle, small size, multiple functions, and is convenient for developers to conduct secondary development, with low cost and short development cycle.

[0033] The utility model also provides an electronic product, which adopts the small display module described in any of the above embodiments. The small display module is convenient for users to set up electronic products on this basis, and integrates multiple functions such as clock circuit, power management function, display function, etc., and can enhance the expandability through external lithium-ion batteries, button batteries, etc., and has the advantages of small size, visualization, large storage space, easy to carry, and strong versatility, and is suitable for a variety of Internet of Things products.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A small display module for expanding the XIAO series development board, the XIAO series development board includes a control module, characterized in that: The small display module comprises: RTC circuit, used to provide time information to the XIAO series development board; FPC connector, used to connect the circular touch display; SD card connector, used to connect SD card; A power supply module, the power supply module at least includes a first power supply for powering the XIAO series development board and a second power supply for powering the RTC circuit; Dip switch, used to control the IO signal connection of the control module.

2. The small display module according to claim 1, characterized in that: The first power supply includes a 5V power supply and a 3.3V power supply.

3. The small display module according to claim 1, characterized in that: The second power supply includes a button battery holder, which is used to connect a button battery to power the RTC circuit.

4. The small display module according to claim 1, characterized in that: The power module also includes a third power source, and the third power source includes a lithium battery connector for connecting a lithium-ion battery.

5. The small display module according to claim 4, characterized in that: It also includes a power management module, which is connected to the lithium-ion battery and is used to control the charging of the lithium-ion battery.

6. The small display module according to claim 5, characterized in that: The power management module includes a step-down circuit for stepping down the voltage of the power module to 3.3V to supply power to the RTC circuit, the FPC connector and the SD card connector. The step-down circuit is a DC-DC step-down circuit.

7. The small display module according to claim 6, characterized in that: The invention also comprises a toggle switch, which is connected to the step-down circuit and is used for controlling the power supply of the small display module.

8. The small display module according to claim 4, characterized in that: A voltage acquisition module is also included for reading the voltage across the lithium-ion battery.

9. The small display module according to claim 3, characterized in that: The button battery is a CR927 standard button battery.

10. An electronic product, characterized in that: The small display module comprises any one of claims 1 to 9.

Images