A red and blue light head care device

Abstract

This utility model discloses a red and blue light head care device, including a power adapter, a controller, and an LED care cap. The power adapter is used to connect to a power source to power the device. The controller is used for mode switching and controlling the LED care cap's on / off switch. The LED care cap consists of an outer shell, a flexible circuit board, and an inner shell, arranged sequentially from the outside in. The flexible circuit board is equipped with a red light source, a blue light source, and a temperature detection component. The red and blue light sources are high-power three-chip LEDs. The controller contains a main control chip, an LED control unit, an indicator light control unit, and a clock control unit, all of which are connected to the main control chip. This utility model offers a larger irradiation area, stronger adaptability, and effectively improved service life. Furthermore, the temperature detection circuit provides over-temperature protection, effectively increasing the product's reliability and safety.

Description

Technical Field

[0001] This utility model relates to the field of LED spectral therapy equipment technology, and in particular to a red and blue light head care device. Background Technology

[0002] With the continuous development of photobiological modulation technology, low-energy phototherapy has been widely used in skin treatment, hair growth, and anti-inflammation. Currently, there are some phototherapy devices on the market that use light-emitting diodes for head treatment.

[0003] Blue light, typically with a wavelength of 400-470 nanometers, has antibacterial and bactericidal effects. It is primarily used for treating wounds on the skin surface, eliminating Propionibacterium acnes to reduce inflammation and acne. It can also inhibit sebum secretion, balancing skin oil production and effectively treating acne and improving enlarged pores. Red light, with a wavelength of approximately 615-635 nanometers, has stronger penetrating power than ultraviolet light but lacks a strong thermal effect. It can penetrate deeper into tissues, reaching a depth of 2-5 cm. Red light can directly reach the submucosal layer of the skin, where its energy is absorbed by tissue cells. This can reduce blood viscosity, lower blood lipids, accelerate cell repair and wound healing, promote the regeneration of damaged nerves, minimize acne-related erythema, and promote blood circulation.

[0004] However, most existing head phototherapy devices use a single wavelength of light or only provide a fixed light mode. This approach cannot meet the diverse needs of different users and different stages of the disease. Furthermore, existing head phototherapy devices have a small irradiation area and poor treatment effect. Summary of the Invention

[0005] In order to overcome the above-mentioned problems in the existing technology, this utility model proposes a red and blue light head care device.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a red and blue light head care device, including a power adapter, a controller, and an LED care cap. The power adapter is used to plug in a power source to power the care device. The controller is used for mode switching and controlling the LED care cap switch. The LED care cap is arranged from the outside to the inside as an outer shell, a flexible board, and an inner shell. The flexible board is provided with a red light source, a blue light source, and a temperature detection component. The red light source and the blue light source are high-power three-chip LEDs. The controller is provided with a main control chip, an LED control unit, an indicator light control unit, and a clock control unit. The LED control unit, indicator light control unit, and clock control unit are all connected to the main control chip.

[0007] The aforementioned red and blue light head care device also includes a side strip on the inner edge of the LED care cap.

[0008] In the aforementioned red and blue light head care device, the temperature detection component is an NTC resistor.

[0009] The aforementioned red and blue light head care device also includes a buzzer in its controller, which is controlled by a main control chip.

[0010] The aforementioned red and blue light head care device has 24 groups of three-chip LED beads connected in parallel, with each group consisting of six three-chip LED beads connected in series.

[0011] In the aforementioned red and blue light head care device, the lamp control unit drives the red and blue light sources to turn on and off through a constant current drive circuit. The constant current drive circuit is equipped with overcurrent and overvoltage protection. When the detected voltage and current exceed the set values, the circuit is cut off.

[0012] The aforementioned red and blue light head care device has 144 three-chip LED beads on the flexible circuit board, including 288 red light sources and 144 blue light sources.

[0013] The beneficial effects of this invention are as follows: the three-chip LED beads are arranged according to the shape of the head, ensuring comprehensive coverage, with evenly distributed beads in the temples and back of the head, resulting in a larger irradiation area. This invention achieves red and blue light therapy through the three-chip LED beads, and the controller allows for mode switching, overcoming the problem of existing technologies using a single wavelength or mode, which cannot adapt to the diverse needs of different users and different stages of the disease. The constant current drive circuit of this invention is equipped with overcurrent and overvoltage protection to prevent damage to the drive circuit and improve its service life. Furthermore, a temperature detection circuit is included to achieve over-temperature protection, effectively increasing the reliability and safety of the product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the assembly of this utility model; Figure 2 This is an exploded view of the LED cap of this utility model; Figure 3 This is a circuit diagram showing the connection between the constant current drive circuit and the three-chip LED beads of this utility model; Figure 4 This is the constant current drive circuit diagram of this utility model. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1As shown, this embodiment discloses a red and blue light head care device, including a power adapter 10, a controller 9, and an LED care cap 11. The power adapter 10 is used to connect to a power source to power the device, and the controller 9 is used for mode switching and controlling the LED care cap's on / off state. Figure 2 As shown, the LED nursing cap 11 consists of an outer shell 1, a flexible board 3, and an inner shell 7 arranged sequentially from the outside in. The flexible board 3 is equipped with a red light source, a blue light source, and a temperature detection component. The red and blue light sources are high-power three-chip LED beads 2. A connector 4 is provided on the upper edge of the flexible board 3, and the controller is connected to the LED cap through the connector 4 to control the on / off state of the red and blue light sources on the flexible board. The inner shell and the outer shell are fixed together by screws 5 and nuts 6. To improve wearing comfort, a side strip 8 is also provided on the edge of the inner shell 7.

[0017] In this embodiment, the high-power three-chip LED is a three-chip RRV5050 LED, consisting of a matrix of 144 high-power LEDs, totaling 432 light sources (288 red light sources and 144 blue light sources). Figure 3 As shown, each group consists of 6 5050 three-chip LEDs connected in series, forming a parallel connection with another group, for a total of 24 groups. An FPC flexible board substrate (i.e., flexible board 3) is used to achieve a curved surface design, resulting in a more rational LED matrix layout. Designed according to the shape of the head, it ensures comprehensive LED coverage. 144 high-power LEDs are used, evenly distributed across the head, and also evenly distributed in the temples and back of the head. In this embodiment, the flexible board size is approximately 0.149㎡ (418mm*355mm), resulting in a larger irradiation area.

[0018] In this embodiment, a temperature detection circuit is provided on the flexible printed circuit board (FPC), using a 0805 SMD 10K 1% NTC resistor to detect the temperature of the FPC LED substrate. When the substrate temperature exceeds the upper limit of 48°C, the controller will turn off the LEDs while continuing to detect the substrate temperature. When the temperature is below the 35°C limit, the controller will resume LED control. Figure 4 As shown, the temperature detection circuit consists of resistors R37 and R34, bypass capacitor C94, and R43 (NTC resistor - NTC3950B). By changing the resistance value of resistor R43, the analog signal is transmitted to pin 19 of the microcontroller U2 to realize AD / analog-to-digital conversion, thereby achieving over-temperature protection and enhancing the reliability and safety of the product.

[0019] The controller is equipped with a main control chip, an LED control unit, an indicator light control unit, a clock control unit, and a buzzer. The LED control unit, indicator light control unit, clock control unit, and buzzer are all connected to the main control chip.

[0020] In this embodiment, the controller is composed of an STMicroelectronics STM8 series processor chip and a constant current driver chip Hi6001A. Power management is handled by the charger; the load supply voltage is boosted to 12-24V via a DC-DC boost circuit through a USB protocol chip to power the FPC flexible board LED panel; and the 12V voltage is converted to 5V by a 78L05E voltage regulator chip to power the controller chip.

[0021] The indicator light control unit controls the indicator lights and the smart mode indicator light. After the device is powered on, it enters standby mode. Press and hold the power button for 3 seconds to turn on the status indicator light, displaying the current light emission status. Touching the smart button turns on both the smart mode indicator light and the current status indicator light simultaneously. The main control chip directly controls the buzzer. The buzzer sounds a long beep when the device is powered on, a short beep when the button is pressed, and a long beep when the working time is up.

[0022] The LED control unit drives the red and blue light sources to switch on and off via a constant current drive circuit. This constant current drive circuit is equipped with overcurrent and overvoltage protection; when the detected voltage and current exceed set values, the circuit is cut off. The specific principle is as follows: Figure 4 As shown, the constant current drive circuit consists of: filter capacitor C96, USB protocol chip U5, configuration resistor R41, chip U1 filter decoupling capacitors C2 and C1, boost inductor L1, freewheeling diode D31, output filter electrolytic capacitor C5, constant current chip U1, output overvoltage protection detection resistors R7 / R2, overcurrent detection resistor R3, loop compensation composed of capacitors C8, C9, and R6, output constant current detection resistors R29 and R42, PWM adjustment resistors R10 and R8, switching frequency adjustment resistor R5 (empty for default frequency), and internal power supply bypass capacitor C6.

[0023] Principle: When the power adapter is connected, chip U1 will attempt to perform a QC3.0 handshake with the adapter's built-in protocol chip after power-on. According to the design, the requested voltage is DC 9V. After the requested voltage is successfully output as 9V, it is filtered by C2 and C1 to maintain a stable 9V DC power. The power is supplied to chip U1 through R4, and at the same time, the voltage is boosted to the required power supply voltage of the load (i.e., the FPC light board) through inductor L1 and freewheeling diode D31.

[0024] When pin 20 of the microcontroller U2 (ORLED port) outputs a high level, MOSFET Q1 is in a switching state and conducts. The red LED circuit of the connected FPC LED board is lit, and a voltage drop is formed across the current sensing resistors R29 and R41. This voltage drop is fed back to pin 7 of chip U1, and after passing through the internal error amplifier, it controls the output current of the FPC LED board. At the same time, it changes the duty cycle of the square wave output by the microcontroller and feeds this signal back to pin 4 of chip U1 (PWM / EN pin). This allows for PWM adjustment of the load's output current, thus achieving dimming control.

[0025] Similarly, when pin 13 of the microcontroller, i.e. the OBLED port, outputs a high level, MOSFET Q2 is in a switching state. Q2 is turned on, and the blue LED circuit of the connected FPC LED board is lit. At the same time, a voltage drop is formed across the current sensing resistors R29 and R41. The voltage drop formed by R29 and R41 is fed back to pin 7 of chip U1. After passing through the internal error amplifier, it controls the output current of the FPC LED board and changes the duty cycle of the square wave output by the microcontroller. This signal is fed back to pin 4 of chip U1, i.e. the PMW / EN pin, which can adjust the output current of the load using PWM, thus realizing dimming control.

[0026] When the load output voltage is abnormal, the voltage across the detection resistors R7 / R2 is fed back to the Vfb pin of chip U1. When the voltage exceeds the set value, the built-in MOSFET of chip U1 is turned off, cutting off the circuit and providing overvoltage protection.

[0027] When the load is overloaded, the current flowing through resistor R4 is detected and fed back to the Cs pin of chip U1. When the current value exceeds the set current value, the chip VIN power supply is turned off, thereby protecting the drive circuit.

[0028] Furthermore, in this embodiment, the controller is equipped with a digital display screen, which displays two digits. Each digit is represented by a 7-segment display consisting of seven light-emitting diodes, driven by the main control chip and controlled by a program to display the corresponding number.

[0029] The workflow of this red and blue light head care device is as follows: Upon powering on, the device enters standby mode, and the controller's digital display shows "OF". Press the "On / Off" button for 3 seconds, and a "beep" sound will be emitted. The red light indicator light will illuminate, displaying the default working time of 35 minutes. Press the "Time" button to adjust the set time, increasing by 5 minutes at a time, up to a maximum of 60 minutes, then decreasing to 5 minutes, cycling through the increments. Press the "Mode" button to select the light output mode, cycling between red and blue light. Press the "Intensity" button to adjust the light power of the current light output mode, cycling through the ranges 01-02-03. Pressing the "Smart" button does not switch light output modes or adjust the time. In this mode, the default working time is 35 minutes, running blue light for 5 minutes, then red light for 30 minutes, until the timer expires.

[0030] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of this utility model.

Claims

1. A red and blue light head care instrument, comprising a power adapter, a controller and an LED care cap, the power adapter is used for plugging a power supply to power the care instrument, and the controller is used for mode switching and controlling the LED care cap switch, characterized in that, The LED nursing cap consists of an outer shell, a flexible circuit board, and an inner shell arranged sequentially from the outside in. The flexible circuit board is equipped with a red light source, a blue light source, and a temperature detection component. The red light source and the blue light source are high-power three-chip LEDs. The controller contains a main control chip, an LED control unit, an indicator light control unit, and a clock control unit. The LED control unit, indicator light control unit, and clock control unit are all connected to the main control chip.

2. The red and blue light head care instrument according to claim 1, characterized in that, The inner shell of the LED nursing cap is also provided with a side strip.

3. The red and blue light head care instrument according to claim 1, characterized in that, The temperature detection component is an NTC resistor.

4. The red and blue light head care instrument according to claim 1, characterized in that, The controller is also equipped with a buzzer, which is controlled by the main control chip.

5. The red and blue light head care instrument according to claim 1, characterized in that, The three-chip LED beads are arranged in 24 groups connected in parallel, and each group includes six three-chip LED beads connected in series.

6. The red and blue light head care instrument according to claim 1, characterized in that, The LED control unit drives the red and blue light sources to turn on and off through a constant current drive circuit. The constant current drive circuit is equipped with overcurrent and overvoltage protection. When the detected voltage and current exceed the set values, the circuit is cut off.

7. The red and blue light head care instrument according to claim 1, characterized in that, The flexible circuit board has 144 three-chip LEDs, including 288 red light sources and 144 blue light sources.

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