Lamp board charging and discharging circuit

Abstract

A lamp board charging and discharging circuit comprises a lithium battery BAT1, a boost converter U1, a charging circuit, a discharging circuit and an LED driving circuit, the lithium battery BAT1 is electrically connected with a pin 7 and a pin 9 of the boost converter U1, the charging circuit is electrically connected with a pin 1 and a pin 9 of the boost converter U1, and the discharging circuit is electrically connected with a pin 8 and a pin 9 of the boost converter U1; the lamp board has the advantages that the charging circuit and the discharging circuit are integrated into the lamp board circuit, and electronic equipment such as a mobile phone can be charged.

Description

Technical Field

[0001] This utility model relates to the field of light sign circuits, specifically to a light sign charging and discharging circuit. Background Technology

[0002] Currently, LED light boards, also known as LED billboards, LED display boards, or LED advertising boards, are made by using LED tubes to form text and patterns on a substrate. When powered, they can emit various beautiful colors such as red, yellow, orange, blue, white, green, and pink, and can also flash and change colors, achieving advertising and display effects. They are mostly used by fans to support celebrities. Existing light board circuits only have the function of charging the battery inside the light board, but do not have the function of discharging, and cannot charge electronic devices such as mobile phones. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned shortcomings by providing a light sign charging and discharging circuit.

[0004] This utility model includes a lithium battery BAT1, a boost converter U1, a charging circuit, a discharging circuit, and an LED driver circuit.

[0005] The lithium battery BAT1 is electrically connected to pins 7 and 9 of the boost converter U1. The charging circuit is electrically connected to pins 1 and 9 of the boost converter U1. The discharging circuit is electrically connected to pins 8 and 9 of the boost converter U1. The LED driver circuit is electrically connected to pins 7 and 9 of the boost converter U1. A switching switch K1 is provided on the circuit connecting the discharging circuit, the LED driver circuit and pin 9 of the boost converter U1.

[0006] The charging circuit includes a TYPE-C interface, resistors R5 and R4, and capacitor C1. Pin A1 of the TYPE-C interface is grounded. Pin B9 of the TYPE-C interface is electrically connected to pin 1 of the boost converter U1. Pin B5 of the TYPE-C interface is electrically connected to pin 9 of the boost converter U1 through resistor R5. Pin B4 of the TYPE-C interface is electrically connected to pins 1 and 9 of the boost converter U1 through capacitor C1. Pin B1 of the TYPE-C interface is electrically connected to pin 9 of the boost converter U1.

[0007] Pin 9 of boost converter U1 is grounded.

[0008] Pin 2 of boost converter U1 is electrically connected to pin 4 of boost converter U1 via two LEDs, and pin 3 of boost converter U1 is electrically connected to pin 4 of boost converter U1 via two LEDs.

[0009] The positive terminal of lithium battery BAT1 is electrically connected to pin 8 of boost converter U1 through inductor L1, and the negative terminal of lithium battery BAT1 is electrically connected to pin 9 of boost converter U1.

[0010] A capacitor C3, a capacitor C2, and a resistor R3 are connected in parallel between the lithium battery BAT1 and the boost converter U1. Pin 6 of the boost converter U1 is electrically connected to the capacitor C2 and the resistor R3.

[0011] The discharge circuit includes a USB interface J2 and a switch K1. Pin 1 of the USB interface J2 is electrically connected to pin 8 of the boost converter U1. Pin 4 of the USB interface J2 is electrically connected to pin 9 of the boost converter U1 through the switch K1. Resistors R1, R2, R6, R7, capacitor C4, and capacitor C5 are connected in parallel between the USB interface J2 and the boost converter U1. Resistors R1 and R6 are connected in series, and resistors R2 and R7 are connected in series. Pin 2 of the USB interface J2 is electrically connected to resistors R2 and R7, and pin 3 of the USB interface J2 is electrically connected to resistors R1 and R6.

[0012] The LED driver circuit includes a battery plug J1, an LED constant current driver U2, and multiple LED strips for illuminating the sign. The battery plug J1 is electrically connected to the lithium battery BAT1 via a switch K1. Pin 4 of the LED constant current driver U2 is electrically connected to pin 2 of the battery plug J1. Pin 1 of the LED constant current driver U2 is electrically connected to pin 1 of the battery plug J1. Pin 3 of the LED constant current driver U2 is electrically connected to the positive terminal of the LED strip via a diode D1. Pin 5 of the LED constant current driver U2 is electrically connected to the negative terminal of the LED strip via a resistor R8. Capacitors C6 and C7 are connected in parallel between the LED constant current driver U2 and the battery plug J1. Resistors R9 and R10 are connected between pin 1 of the battery plug J1 and the negative terminal of the LED strip. An inductor L2 is connected between pins 3 and 4 of the LED constant current driver U2.

[0013] Pin 1 of LED constant current driver U2 is grounded. A Zener diode D2 is electrically connected between pins 5 and 3 of LED constant current driver U2. Capacitors C8 and C9 are electrically connected between the positive terminal of the LED strip and diode D1. Capacitor C9 is grounded.

[0014] The LED light strip includes a set of parallel LEDs, which consists of three LEDs connected in series and a resistor R.

[0015] The advantage of this invention is that it integrates the charging circuit and the discharging circuit into the light sign circuit, enabling it to charge electronic devices such as mobile phones. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the charging circuit structure for the light sign of this utility model.

[0017] Figure 2 This is a schematic diagram of the discharge circuit structure of the light sign of this utility model.

[0018] Figure 3 This is a schematic diagram of the LED driver circuit structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the LED light strip circuit structure of this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, if terms such as "first" or "second" appear in the description of this invention, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0025] As shown in the attached diagram, this utility model includes a lithium battery BAT1, a boost converter U1, a charging circuit, a discharging circuit, and an LED driver circuit.

[0026] The lithium battery BAT1 is electrically connected to pins 7 and 9 of the boost converter U1. The charging circuit is electrically connected to pins 1 and 9 of the boost converter U1. The discharging circuit is electrically connected to pins 8 and 9 of the boost converter U1. The LED driver circuit is electrically connected to pins 7 and 9 of the boost converter U1. A switching switch K1 is provided on the circuit connecting the discharging circuit, the LED driver circuit and pin 9 of the boost converter U1.

[0027] The charging circuit includes a TYPE-C interface, resistors R5 and R4, and capacitor C1. Pin A1 of the TYPE-C interface is grounded. Pin B9 of the TYPE-C interface is electrically connected to pin 1 of the boost converter U1. Pin B5 of the TYPE-C interface is electrically connected to pin 9 of the boost converter U1 through resistor R5. Pin B4 of the TYPE-C interface is electrically connected to pins 1 and 9 of the boost converter U1 through capacitor C1. Pin B1 of the TYPE-C interface is electrically connected to pin 9 of the boost converter U1.

[0028] Pin 9 of boost converter U1 is grounded.

[0029] Pin 2 of boost converter U1 is electrically connected to pin 4 of boost converter U1 via two LEDs, and pin 3 of boost converter U1 is electrically connected to pin 4 of boost converter U1 via two LEDs.

[0030] The positive terminal of lithium battery BAT1 is electrically connected to pin 8 of boost converter U1 through inductor L1, and the negative terminal of lithium battery BAT1 is electrically connected to pin 9 of boost converter U1.

[0031] A capacitor C3, a capacitor C2, and a resistor R3 are connected in parallel between the lithium battery BAT1 and the boost converter U1. Pin 6 of the boost converter U1 is electrically connected to the capacitor C2 and the resistor R3.

[0032] The discharge circuit includes a USB interface J2 and a switch K1. Pin 1 of the USB interface J2 is electrically connected to pin 8 of the boost converter U1. Pin 4 of the USB interface J2 is electrically connected to pin 9 of the boost converter U1 through the switch K1. Resistors R1, R2, R6, R7, capacitor C4, and capacitor C5 are connected in parallel between the USB interface J2 and the boost converter U1. Resistors R1 and R6 are connected in series, and resistors R2 and R7 are connected in series. Pin 2 of the USB interface J2 is electrically connected to resistors R2 and R7, and pin 3 of the USB interface J2 is electrically connected to resistors R1 and R6.

[0033] The LED driver circuit includes a battery plug J1, an LED constant current driver U2, and multiple LED strips for illuminating the sign. The battery plug J1 is electrically connected to the lithium battery BAT1 via a switch K1. Pin 4 of the LED constant current driver U2 is electrically connected to pin 2 of the battery plug J1. Pin 1 of the LED constant current driver U2 is electrically connected to pin 1 of the battery plug J1. Pin 3 of the LED constant current driver U2 is electrically connected to the positive terminal of the LED strip via a diode D1. Pin 5 of the LED constant current driver U2 is electrically connected to the negative terminal of the LED strip via a resistor R8. Capacitors C6 and C7 are connected in parallel between the LED constant current driver U2 and the battery plug J1. Resistors R9 and R10 are connected between pin 1 of the battery plug J1 and the negative terminal of the LED strip. An inductor L2 is connected between pins 3 and 4 of the LED constant current driver U2.

[0034] Pin 1 of LED constant current driver U2 is grounded. A Zener diode D2 is electrically connected between pins 5 and 3 of LED constant current driver U2. Capacitors C8 and C9 are electrically connected between the positive terminal of the LED strip and diode D1. Capacitor C9 is grounded.

[0035] The LED light strip includes a set of parallel LEDs, which consists of three LEDs connected in series and a resistor R.

[0036] Example 1: Boost converter U1 is an integrated boost converter, a multi-functional power management system (SoC) chip that manages the charging of lithium battery BAT1 and indicates battery level. The synchronous boost system within boost converter U1 provides a maximum output current of 2.4A with a conversion efficiency of up to 93%. It automatically enters sleep mode under light load, reducing the quiescent current to 100 microamps. It can provide 5V, 2.4A charging power to mobile phones. Boost converter U1 employs switching charging technology, providing a maximum charging current of 2.1A for charging the lithium battery BAT1 in this circuit.

[0037] The boost converter U1 incorporates a chip for temperature and input voltage detection, enabling intelligent adjustment of the charging current. It also supports an LED power display to indicate the remaining charge level of the lithium battery in the circuit.

[0038] The U2 LED constant current driver is a boost-type LED constant current driver that can provide a maximum drive current of 4A, with a conversion efficiency of up to 94%. It features excellent line regulation and load regulation, overcurrent protection, and overheat shutdown. This circuit uses a single-cell lithium battery with a built-in lithium battery protection chip; the battery voltage is 3.7V.

[0039] Connect the TYPE-C interface to charge the lithium battery BAT1 via the boost converter U1. Move the switch K1 to the left to turn on the LED driver circuit, which illuminates the LED strip via the LED constant current driver U2. Move the switch K1 to the right to turn off the LED strip and turn on the discharge circuit, which discharges the battery via the USB interface J2. Then, connect the phone charging cable to charge the phone.

Claims

1. A charging and discharging circuit for a light sign, characterized in that... This includes a lithium battery (BAT1), a boost converter (U1), a charging circuit, a discharging circuit, and an LED driver circuit. The lithium battery BAT1 is electrically connected to pins 7 and 9 of the boost converter U1. The charging circuit is electrically connected to pins 1 and 9 of the boost converter U1. The discharging circuit is electrically connected to pins 8 and 9 of the boost converter U1. The LED driver circuit is electrically connected to pins 7 and 9 of the boost converter U1. A switching switch K1 is provided on the circuit connecting the discharging circuit, the LED driver circuit and pin 9 of the boost converter U1.

2. The light sign charging and discharging circuit according to claim 1, characterized in that, The charging circuit includes a TYPE-C interface, resistors R5 and R4, and capacitor C1. Pin A1 of the TYPE-C interface is grounded. Pin B9 of the TYPE-C interface is electrically connected to pin 1 of the boost converter U1. Pin B5 of the TYPE-C interface is electrically connected to pin 9 of the boost converter U1 through resistor R5. Pin B4 of the TYPE-C interface is electrically connected to pins 1 and 9 of the boost converter U1 through capacitor C1. Pin B1 of the TYPE-C interface is electrically connected to pin 9 of the boost converter U1.

3. The light sign charging and discharging circuit according to claim 2, characterized in that, Pin 9 of boost converter U1 is grounded.

4. The light sign charging and discharging circuit according to claim 3, characterized in that, Pin 2 of boost converter U1 is electrically connected to pin 4 of boost converter U1 via two LEDs, and pin 3 of boost converter U1 is electrically connected to pin 4 of boost converter U1 via two LEDs.

5. The light sign charging and discharging circuit according to claim 4, characterized in that, The positive terminal of lithium battery BAT1 is electrically connected to pin 8 of boost converter U1 through inductor L1, and the negative terminal of lithium battery BAT1 is electrically connected to pin 9 of boost converter U1.

6. The light sign charging and discharging circuit according to claim 5, characterized in that, A capacitor C3, a capacitor C2, and a resistor R3 are connected in parallel between the lithium battery BAT1 and the boost converter U1. Pin 6 of the boost converter U1 is electrically connected to the capacitor C2 and the resistor R3.

7. The light sign charging and discharging circuit according to claim 6, characterized in that, The discharge circuit includes a USB interface J2 and a switch K1. Pin 1 of the USB interface J2 is electrically connected to pin 8 of the boost converter U1. Pin 4 of the USB interface J2 is electrically connected to pin 9 of the boost converter U1 through the switch K1. Resistors R1, R2, R6, R7, capacitor C4, and capacitor C5 are connected in parallel between the USB interface J2 and the boost converter U1. Resistors R1 and R6 are connected in series, and resistors R2 and R7 are connected in series. Pin 2 of the USB interface J2 is electrically connected to resistors R2 and R7, and pin 3 of the USB interface J2 is electrically connected to resistors R1 and R6.

8. The light sign charging and discharging circuit according to claim 7, characterized in that, The LED driver circuit includes a battery plug J1, an LED constant current driver U2, and multiple LED strips for illuminating the sign. The battery plug J1 is electrically connected to the lithium battery BAT1 via a switch K1. Pin 4 of the LED constant current driver U2 is electrically connected to pin 2 of the battery plug J1. Pin 1 of the LED constant current driver U2 is electrically connected to pin 1 of the battery plug J1. Pin 3 of the LED constant current driver U2 is electrically connected to the positive terminal of the LED strip via a diode D1. Pin 5 of the LED constant current driver U2 is electrically connected to the negative terminal of the LED strip via a resistor R8. Capacitors C6 and C7 are connected in parallel between the LED constant current driver U2 and the battery plug J1. Resistors R9 and R10 are connected between pin 1 of the battery plug J1 and the negative terminal of the LED strip. An inductor L2 is connected between pins 3 and 4 of the LED constant current driver U2.

9. The light sign charging and discharging circuit according to claim 8, characterized in that, Pin 1 of LED constant current driver U2 is grounded. A Zener diode D2 is electrically connected between pins 5 and 3 of LED constant current driver U2. Capacitors C8 and C9 are electrically connected between the positive terminal of the LED strip and diode D1. Capacitor C9 is grounded.

10. A light sign charging and discharging circuit according to claim 9, characterized in that, The LED light strip includes a set of parallel LEDs, which consists of three LEDs connected in series and a resistor R.

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