A low-power driving circuit for an ultra-thin light-emitting character sign

Abstract

The utility model provides a kind of low-power drive circuit suitable for ultrathin light-emitting character mark, including LED lamp set unit, driver, circuit control module, capacitor, first inductance, second inductance;Wherein, LED lamp set unit is made of multiple independent LED unit, LED wick in each LED unit is connected in series, each LED unit is connected in parallel with remaining LED unit after being connected in series with corresponding patch resistor, then is connected with capacitor in parallel and is connected into driver;The VIN-pin of driver is connected with first inductance and is connected with the negative pole of LED lamp set unit, VIN pin is connected with circuit control module, second inductance, the positive pole of LED lamp set unit in order, circuit control module includes voltage monitoring module, microcontrol unit, dynamic current regulation module, for dynamically adjusting each LED unit current, the wire for being electrically connected in the low-power drive circuit is all flattened wire.The circuit significantly reduces energy consumption under the premise of guaranteeing light-emitting uniformity and stability, prolongs the service life of equipment, supports lighter and thinner industrial design.

Description

Technical Field

[0001] This utility model relates to the field of LED lighting technology, specifically to a low-power driving circuit suitable for ultra-thin illuminated signs. Background Technology

[0002] Traditional LED driver circuits have two major drawbacks in ultra-thin illuminated signage applications: (1) power consumption: conventional circuits suffer significant energy loss due to current voltage drop, affecting luminous efficiency and lifespan; (2) the physical spacing between the driver components and the LED light group restricts ultra-thin design, making it difficult to meet the lightweight requirements of modern signage products. Existing solutions, such as series LED light groups, can reduce power consumption, but sacrifice brightness uniformity. Therefore, it is necessary to optimize the circuit structure to achieve energy saving and thin design. Summary of the Invention

[0003] In view of the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a low-power driving circuit suitable for ultra-thin illuminated signboards. This driving circuit, by optimizing the circuit architecture and control strategy, significantly reduces energy consumption, extends the service life of the device, and supports thinner and lighter industrial designs while ensuring the uniformity and stability of light emission. It solves the technical problems of high power consumption and low energy efficiency of existing ultra-thin illuminated signboard driving circuits.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A low-power driving circuit suitable for ultra-thin illuminated signs includes an LED light group unit, a driver, a circuit control module, a capacitor, a first inductor, and a second inductor. The LED light group unit consists of multiple independent LED units, with each LED chip connected in series. Each LED unit is connected in series with its corresponding surface-mount resistor, then in parallel with the other LED units, and finally in parallel with the capacitor before being connected to the driver. The driver's pin 1 is connected to the positive terminal of an external power supply, pin 2 is grounded, the VIN- pin is connected to the first inductor and to the negative terminal of the LED light group unit, and the VIN pin is connected to the circuit control module, the second inductor, and the positive terminal of the LED light group unit. The circuit control module includes a voltage monitoring module, a microcontroller unit, and a dynamic current adjustment module. The voltage monitoring module detects the supply voltage in real time and transmits the monitoring data to the microcontroller unit. The microcontroller unit drives the dynamic current adjustment module based on the monitoring data to dynamically adjust the current of each LED unit.

[0006] As a preferred embodiment of this invention, the LED unit contains 3-5 LED chips connected in series.

[0007] As a preferred embodiment of this utility model, the LED chips connected in series adopt a common anode welding method, the spacing between the LED chips is controlled at 1.2mm±0.1mm, and current limiting protection is provided by a 100Ω±5% chip resistor.

[0008] As a preferred embodiment of this invention, the wires used for electrical connections in the low-power drive circuit are all flat wires.

[0009] As a preferred embodiment of this invention, the circuit control module further includes a light sensing monitoring module or an infrared monitoring module. The light sensing monitoring module is used to monitor ambient light intensity, and the infrared monitoring module is used to monitor pedestrian flow. The microcontroller unit drives the dynamic current adjustment module to dynamically adjust the brightness of the LED light group unit based on the ambient light intensity or pedestrian flow data.

[0010] Advantages and beneficial effects of this utility model:

[0011] (1) This utility model divides the LED lamp group unit into multiple independent LED units. The LED lamps in each LED unit are connected in series, and the units are connected in parallel to the driver, which effectively reduces the current voltage drop and energy loss, and makes the overall power consumption significantly lower than that of the traditional solution.

[0012] (2) This utility model uses a flat wire connection method to replace the traditional PCB wiring, which significantly reduces the thickness of the circuit substrate and achieves overall structural compression.

[0013] (3) The circuit provided by this utility model is equipped with a dynamic current adjustment module, which is integrated inside the circuit control module. This module can dynamically adjust the current of each LED unit according to the real-time detected power supply voltage to ensure the brightness consistency under different voltages and avoid overload power consumption.

[0014] (4) The circuit provided by this utility model has a uniform LED brightness, which helps to improve the uniformity of light emission of the illuminated sign, avoid local overly bright or dark areas, and enhance visual consistency.

[0015] (5) The low power consumption operation of this utility model can reduce heat generation, thereby reducing the aging rate of components and effectively extending the service life of the illuminated sign.

[0016] (6) The circuit control module of this utility model can also be equipped with a light sensing monitoring module or an infrared monitoring module. The micro control unit module dynamically adjusts the brightness of the LED light group unit according to the ambient light intensity and / or the flow of people through the dynamic current adjustment module, so as to achieve on-demand power supply and avoid energy waste.

[0017] (7) This utility model simplifies the circuit layout and reduces heat dissipation components, supports ultra-thin structure design, provides a technical basis for the thinning of illuminated signs, and broadens application scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly described 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. In the drawings:

[0019] Figure 1 This utility model provides a low-power driving circuit diagram suitable for ultra-thin illuminated signs;

[0020] Figure 2 A schematic diagram of the circuit control module provided by this utility model. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] like Figure 1 , Figure 2 As shown, this embodiment provides a low-power driving circuit suitable for ultra-thin illuminated signs, including an LED light group unit, a driver, a circuit control module, a capacitor C1, a first inductor L1, and a second inductor L2. The LED light group unit is composed of multiple independent LED units, with the LED chips within each unit connected in series. Specifically, LED1, LED4, and LED7 in the first LED unit are connected in series; LED2, LED5, and LED8 in the second LED unit are connected in series; and LED3, LED6, and LED9 in the third LED unit are connected in series. Each LED unit is connected in series with its corresponding surface mount resistor and then in parallel with the remaining LED units. This parallel connection with capacitor C1 is then connected to the driver. Specifically, the first LED unit is connected in series with surface mount resistor R1, the second LED unit with surface mount resistor R2, and the third LED unit with surface mount resistor R3. This design matches the driver's output characteristics through the principle of positive voltage superposition.

[0023] The driver input pin 1 is connected to the positive terminal of the external power supply (VCC), and pin 2 is grounded. The driver output pin VIN- is connected to the first inductor L1 and the negative terminal of the LED lamp unit. The VIN pin is connected to the circuit control module, the second inductor L2, and the positive terminal of the LED lamp unit.

[0024] The circuit control module includes a voltage monitoring module, a microcontroller unit (MCU), and a dynamic current adjustment module (PWM module). The voltage monitoring module is used to detect the power supply voltage in real time and transmit the monitoring data to the microcontroller unit. The microcontroller unit drives the dynamic current adjustment module according to the monitoring data to dynamically adjust the current of each LED unit, ensuring consistent brightness under different voltages while avoiding overload power consumption.

[0025] Furthermore, in this embodiment, the LED chips connected in series adopt a common anode welding method, the chip (LED chip) spacing is controlled at 1.2mm±0.1mm, and current limiting protection is provided by a 0402 packaged chip resistor (100Ω±5%) to form a stable minimum light-emitting module.

[0026] Furthermore, in this embodiment, the voltage monitoring module uses a series voltage divider resistor network R4-R5 (R4 = 10kΩ, R5 = 1kΩ) to sample the power supply voltage, and converts the high voltage signal into a range that the MCU can collect through a voltage division ratio of 10:1.

[0027] Furthermore, in this embodiment, the wires used for electrical connections in the low-power drive circuit are all flat wires, which significantly reduces the thickness of the circuit substrate and achieves overall structural compression.

[0028] Furthermore, in this embodiment, the circuit control module also includes a light sensing monitoring module or an infrared monitoring module. The light sensing monitoring module is used to monitor ambient light intensity, and the infrared monitoring module is used to monitor pedestrian flow. The microcontroller unit drives the dynamic current adjustment module to dynamically adjust the brightness of the LED light group unit based on the ambient light intensity or pedestrian flow data.

[0029] It should be noted that in this embodiment, the voltage monitoring module, microcontroller unit, dynamic current regulation module and other functional modules can all be directly adopted from existing modules, and their structure itself is not an improvement point of this application.

[0030] The above describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A low-power driving circuit suitable for ultra-thin illuminated signs, characterized in that, The system includes an LED lamp assembly unit, a driver, a circuit control module, a capacitor, a first inductor, and a second inductor. The LED lamp assembly unit consists of multiple independent LED units, with each LED chip connected in series. Each LED unit is connected in series with its corresponding surface-mount resistor, then in parallel with the other LED units, and finally in parallel with the capacitor before being connected to the driver. The driver's pin 1 is connected to the positive terminal of an external power supply, pin 2 is grounded, the VIN- pin is connected to the first inductor and then to the negative terminal of the LED lamp assembly unit, and the VIN pin is connected to the circuit control module, the second inductor, and the positive terminal of the LED lamp assembly unit. The circuit control module includes a voltage monitoring module, a microcontroller unit, and a dynamic current adjustment module. The voltage monitoring module detects the supply voltage in real time and transmits the monitoring data to the microcontroller unit. The microcontroller unit drives the dynamic current adjustment module based on the monitoring data to dynamically adjust the current of each LED unit.

2. The low-power driving circuit suitable for ultra-thin illuminated signs according to claim 1, characterized in that, The LED unit contains 3-5 LED chips connected in series.

3. The low-power driving circuit suitable for ultra-thin luminous letter signs according to claim 1, characterized in that, The LED chips connected in series adopt a common anode welding method, and the spacing between the LED chips is controlled at 1.2mm±0.1mm. Current limiting protection is provided by a 100Ω±5% chip resistor.

4. The low-power driving circuit suitable for ultra-thin luminous letter signs according to claim 1, characterized in that, In low-power drive circuits, all wires used for electrical connections are flat wires.

5. A low-power driving circuit suitable for ultra-thin luminous lettering according to any one of claims 1 to 4, characterized in that, The circuit control module also includes a light sensing module or an infrared monitoring module. The light sensing module is used to monitor ambient light intensity, and the infrared monitoring module is used to monitor pedestrian flow. The microcontroller unit drives the dynamic current adjustment module to dynamically adjust the brightness of the LED light group unit based on the ambient light intensity or pedestrian flow data.

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