KR20220043744A - Lighting Test Instrument on Human Skin with Bluetooth Technology - Google Patents

Abstract

The present invention relates to a skin light exposure experiment apparatus and, more specifically, to a skin light exposure experiment apparatus using Bluetooth technology, in which an LED light source of a UV wavelength range or blue light wavelength range is emitted to the skin by using Bluetooth wireless communication technology, so that effect on the human body in an environment where light sources of similar wavelengths exist or are included in actual sunlight is checked, thereby being safely and conveniently used from complicated line management, and the like. To this end, the skin light exposure experiment apparatus comprises: a light emission module providing a plurality of UV or blue light LED light sources; a light transmittance measurement module capable of measuring the amount of light; a skin change measurement module quantitatively measuring the degree of change after a light exposure experiment on the skin; and a control device integrally controlling the modules by transmitting control commands and data through Bluetooth communication.

Description

Lighting Test Instrument on Human Skin with Bluetooth Technology

The present invention relates to a skin light irradiation experimental device, and more particularly, by using a Bluetooth wireless communication technology to irradiate an LED light source in a UV wavelength band or a blue light wavelength band to the skin to be included in actual sunlight or a light source in a similar wavelength band exists. It relates to a skin light irradiation experimental device using Bluetooth wireless technology that can be used safely and conveniently from complicated line management when wired connection by checking the effect on the human body in the environment where it is used.

As a conventional method, a device that irradiates UV light to the skin (eg, Solar Light's Model 601 Multiport SPF Testing 6 Output Solar Simulator) or a device that irradiates blue light (sometimes developed and used as an experimental device) is developed. Although most of the light irradiation devices are integrated into the body or connected with cables, the experimental devices are enlarged or inconvenient to use due to long cables. In addition, in order to observe the effect on the skin after the light irradiation experiment, a method of recording the degree of change or storing the data was used according to the subjective judgment of the experimenter.

In order to improve this inconvenience, it is required to operate the measuring device without wires, prepare or add an irradiation device of the required wavelength band, and to configure the power supply and control device to be modularized so that the measurement-only sensor can be controlled wirelessly.

KR Patent No. 1654920 (2016.08.31) KR Patent No. 1324255 (2013.10.25)

The present invention has been proposed to solve the problems of the prior art as described above, and when using a control device and a light irradiation device connected by wire, there is a limitation in the distance that can be used for experimentation, and the wired cable takes up space or is stable as an obstacle. It is an object to solve the problem that the experiment may not be done, and to provide a skin light irradiation experiment device using Bluetooth wireless technology to additionally provide a tool for measuring the skin condition before and after light irradiation. .

In addition, the present invention is a skin light irradiation test device using Bluetooth wireless technology to evaluate the blocking performance of cosmetics such as UV light or blue light on the skin of the skin, or to measure and evaluate the blocking performance of cosmetics such as UV light or blue light. Its purpose is to provide

Another object of the present invention is to provide a skin light irradiation test apparatus using Bluetooth wireless technology that can independently set or control the intensity of the test light, the irradiation time, and the number of repetitions.

In addition, the present invention requires a calibration process to maintain certain characteristics of the light irradiation device and the measurement module, and an object of the present invention is to provide a skin light irradiation test apparatus using Bluetooth wireless technology capable of such calibration.

The skin light irradiation test apparatus using the Bluetooth wireless technology of the present invention for achieving the above object includes a light irradiation module providing a plurality of UV or blue light LED light sources; a light transmittance measurement module capable of measuring the amount of light; a skin change measurement module for quantitatively measuring the degree of change after the light irradiation experiment on the skin; and a control device for integrally controlling the modules by transmitting control commands and data through Bluetooth communication. It is characterized in that it comprises a.

Here, the main controller and the plurality of modules are controlled in a one-to-many format through Bluetooth wireless communication and are characterized in that they can receive measurement data.

In addition, the light irradiation module includes a plurality of individually controllable UV or blue light LED light sources and is driven by a rechargeable secondary battery, and each light source in the control device operates according to the set light irradiation intensity, irradiation time, and number of repetitions. characterized by being

In addition, the light transmittance measurement module is equipped with a plurality of light quantity measurement sensors to apply a light blocking agent for in vitro experiments as a light source by the light irradiation module to the experimental plate and to observe the light transmission characteristics or light blocking characteristics and the measured data is displayed on a display device of the control device or stored in a memory device.

In addition, the skin change measurement module is equipped with a plurality of color measurement sensors to detect color or calculate brightness to measure quantified data, and the measured data is displayed on a display device of the control device or stored in a memory device do it with

The skin light irradiation test apparatus using the Bluetooth wireless technology of the present invention configured as described above exhibits the following useful effects.

First, efficient experiments are possible by providing a miniaturized and lightweight UV or blue light irradiation device that is controlled and operated wirelessly. In particular, multiple modules can be simultaneously controlled by one control device through Bluetooth communication.

Second, the light blocking effect can be directly measured while conducting an in-vitro experiment with a light irradiation device, and the measured data can be transmitted to the control device with a wireless function.

Third, the effect on the skin after the light irradiation experiment can be directly measured by changes in skin color or brightness, and the measured data can be transmitted to the control device through a wireless function.

Fourth, since each module is powered by a rechargeable battery without using an external power source, its function can be implemented as a completely wireless product.

Fifth, each module can conduct accurate experiments by maintaining certain characteristics for each product through the proposed calibration process.

1 is a photograph showing a wireless light irradiation experimental apparatus according to the present invention;
Figure 2 is a photograph showing the functional module of the wireless light irradiation experimental apparatus according to the present invention;
3 is a control device charging unit of the wireless light irradiation experimental apparatus according to the present invention;
4 is a functional block diagram of a wireless light irradiation experimental apparatus according to the present invention;
5 is an experimental arrangement diagram of a light irradiation module and a light transmittance measurement module during an in-vitro experiment of the wireless light irradiation test apparatus according to the present invention;
6 is a circuit functional block diagram of each module of the wireless light irradiation experimental apparatus according to the present invention;
7 is an external view of the light irradiation module of the wireless light irradiation experiment apparatus according to the present invention;
8 is an external view of the light transmission measurement module of the wireless light irradiation experimental apparatus according to the present invention;
9 is a light source calibration conversion graph of the light irradiation module of the wireless light irradiation experiment apparatus according to the present invention;
10 is an illumination sensor calibration conversion graph of the light transmission module of the wireless light irradiation experimental apparatus according to the present invention;
11 is a view showing an example of the brightness L calibration conversion graph of the skin change measurement module of the wireless light irradiation experimental apparatus according to the present invention.

Hereinafter, preferred embodiments in which the object of the present invention can be specifically realized will be described in detail with reference to the accompanying drawings. In describing the present embodiment, the same names are used for the same components, and an additional description thereof will be omitted.

The present invention provides a light irradiation device and a plurality of measuring devices for experimentally confirming the light blocking effect of a light blocking cosmetic product for blocking the effect of UV light or blue light on human skin in a natural environment.

In particular, there is a feature that a plurality of modules can be operated by using a rechargeable battery for power and Bluetooth wireless communication for control without using a line for power supply or control.

Specifically, as shown in FIG. 1 , the present invention is composed of a plurality of experimental modules 100 and a control device 200 for charging or controlling functions while mounting them.

The control device 200 is composed of a CPU driven by an OS, peripheral circuits, and an LCD display device, and a program is installed to set the operating conditions of the light irradiation device, and transmit the set parameters to the light irradiation device or measure data from the measuring device. It includes a Bluetooth wireless communication unit for receiving, and is composed of a wirelessly driven light irradiation device and a charging unit for charging the battery power of the measuring device.

As shown in FIG. 2, the functional module is a plurality of BL light irradiator modules 100, light transmittance measurement module 110, and skin change measurement module 120. As can be seen in the figure, the BL light irradiator module 100 has six light sources. (UV light or blue light, used as blue light in this example) is mounted at uniform intervals so that the light source is turned on or off according to the light irradiation condition determined by the control unit.

The light transmittance measurement module 110 is for measuring the light blocking effect of a light blocking agent using the light irradiator module 100 in an in vitro experiment, and as shown in FIG. By arranging the blocking cosmetics, the amount of light that 6 light sources of the light irradiator pass through the light blocking cosmetics is measured and calculated by the 6 sensors of the light transmittance measuring module.

The skin change measurement module 120 provides a function of measuring and calculating a change in the state of the skin, in particular a change in color or brightness, after performing a light irradiation experiment on the skin using a light irradiator. In this embodiment, the skin color at the location where the light irradiation experiment was performed is detected by the six color sensors mounted in the skin change measurement module, and more specifically, by the color sensor detecting three colors of R, G, and B. Measure and calculate the color value and display the R.G.B color value or convert it to the Lab color system and display it as the lightness L value.

In the invention product shown in Fig. 1, a 12V 3A DC input adapter for supplying 12V DC power required for the control device 200 is connected to the outside of the stationary housing, and there is a main power switch for connecting or cutting off the main power. The main power is converted into various power sources required by the entire circuit in the RF control board of the control device, for example, 5V required in the circuit for driving the control board or charging modules, and 3.3V required by the control chip for Bluetooth communication.

A touch-type LCD is attached to the stationary housing main body for program operation or for setting control parameters of each module. When the program is driven, a UI screen for control is displayed on the LCD, and the LED light source driving conditions of the light irradiator module 100 are set or the data transmitted from the light transmission measurement module 110 or the skin change measurement module 120 is displayed on the screen. It provides a display function.

In addition, as shown in FIG. 3 , a charging unit for storing products or charging battery power by mounting each module is provided. In this embodiment, the charging unit is composed of a pogo pin for charging with a spring function and a switch to prevent a risk due to a power short circuit, and charging current to the module through the pogo pin for charging only under the condition that the switch is conducted due to the weight of the module is designed to be supplied.

As shown in FIG. 1, when the main power is supplied, the green LED is turned on, and when the module and Bluetooth are connected, the blue LED is turned on. In particular, in the absence of Bluetooth connection, the blue LED keeps blinking to provide a function to inform the user that there is no Bluetooth wirelessly connected module.

As shown in Fig. 1, in this embodiment, three button switches are provided below the LCD to turn on or off the LCD while the main power is supplied, and a function to move or select the control cursor on the screen when the LCD is on switch is provided.

As shown in the overall configuration diagram of FIG. 4 , a function command is transmitted to the RF control unit 220 or received by the RF control unit 220 using UART communication between the main control unit 210 and the RF control unit 220 in the control device. transmits the sensor measurement data of the controller to the main controller to perform the necessary calculations. The main control unit 210) has an SD storage device for storing data or loading a program, and a driver for driving the LCD display device is configured.

The RF controller 220 wirelessly transmits the function command received from the program of the main controller 210 to the corresponding module by the Bluetooth transmitter or receives sensor measurement data requested by the module via Bluetooth and delivers it to the main controller 210 . to do it The RF control unit 220 is implemented so that a Bluetooth-connected module is recognized or a one-to-many Bluetooth wireless connection is established with a plurality of modules in order to operate a desired function in the module. Each module has a unique ID, so that the RF control unit transmits the ID and necessary commands in one packet so that only the module can perform the desired function (in this embodiment, communication protocols for various cases are defined and used, has exist).

In addition, the RF control unit 220 configures two LEDs (green, blue) to indicate whether power is supplied or to display the Bluetooth communication status with the module to check the connection status between the control device 200 and the modules 100, 110, and 120. make it possible

And it provides a charging terminal in the form of a pogo pin for charging the module.

As shown in FIG. 2 , a power switch for supplying power to each function module 100 , 110 , 120 is configured outside the housing, so that the module can be turned on or off by long pressing the switch. While the module is on, you can start the set function of each module by briefly pressing the switch. In addition, three LEDs are arranged on the front of each module, and it consists of a green LED for power on/off indication, a red LED for internal battery charging/charging completion indication, and a blue LED for Bluetooth communication status indication. When the battery voltage is low and charging is required, the green LED blinks to inform charging.

As can be seen in Figure 2, each module is equipped with a light source LED or a sensor for measurement, the light irradiator module is equipped with a UV light LED or a blue light LED. As for the light source used in the experiment, UV-C, UV-B, and UV-A LEDs between 250 and 410 nm may be used for UV light, and blue light LEDs between 410 and 480 nm may be used as the light source for the blue light source.

As can be seen in Figure 6, the light irradiator module 100 of the embodiment of the present invention has six LEDs for light sources attached to the PCB, and a Li-Polymer rechargeable battery supplying power and battery charging or external power are appropriate for the internal circuit. PMIC for charging chip and power management chip that distributes and manages PMIC, a control chip for Bluetooth communication that enables Bluetooth communication, and a PWM driver or current driver and cradle that supplies appropriate current to the LED for light source to control the intensity of the light source in an I2C manner. It consists of a charging terminal for charging when mounted on the housing, a DC jack for external power input, and a switch to turn the power on and off, or start or stop the light irradiation function.

For the 6 light source LEDs, it is necessary to keep the light quantity or light intensity constant with respect to the same current. For this, a calibration process for 6 LEDs is required. In the embodiment of the present invention, in order to match the intensity of the six LEDs to the intensity of the standard light source, the six functions estimated by measuring the light intensity with respect to the input current for the six LEDs are approximated as a function of the light intensity of the reference light source. Calibration was carried out to That is, if the light intensity function of the standard light source is Ys = fs(Xs), and the light intensity function in the module is obtained as Ym _i = fm _i (Xm _i ) i = 1~6 for 6 LED light sources (according to the experiment The function y can be expressed as a linear linear or quadratic function.), the input current of the i-th LED is obtained as Xm _i = fm _i ^-1 (Ys) so that each LED can generate a constant amount of light.

In the program of the main controller 210, the intensity of each light source LED of the light irradiator module 100 can be set from 0 to 100%. In the experimental apparatus of the present invention, a light intensity of about 2800 to 3000 Lux is provided at 100% as a standard light source. In the case of actual skin experiment, the amount of light energy transmitted is controlled by adjusting the light source On time while using the light intensity of about 500 ~ 1100Lux, that is, setting it to 40% or less.

According to the example in FIG. 9, the current input value is converted to 35% and 39% after calibration for 65% through an example of the light intensity function of the standard light source and the light intensity function for two light irradiation module LEDs in the present invention can do. That is, when LED1 of the light irradiation device of the present invention receives 35% input and when LED3 receives 39% input, it means that light can be irradiated with the same light intensity as the standard light source.

In the program of the main control unit 210, in addition to the intensity of each light source LED of the light irradiator module 100, the on time and the off time can be set, and the number of On/Off repetitions can also be specified.

This setting of the operating conditions for the light irradiator module 100 is a very useful function during an actual experiment, and allows the experiment to proceed according to the conditions set by the program without the experimenter continuously monitoring and observing the subject.

The battery for power used in the light irradiator module 100 is a Li-Polymer secondary battery having a capacity of 2000 mAh. When the light source is operated continuously at 50% intensity, it can be used for more than 2 hours, so if it is common to conduct light irradiation experiments on human skin within 30 minutes, multiple subjects or multiple experiments are possible with one charge.

The communication protocol for Bluetooth wireless communication defines and uses the following packet structure. In the embodiment of the present invention, a 10-byte communication packet is defined and used between the main control unit 210 and the RF control unit 220 as follows, and an 8-byte communication packet is transmitted between the RF control unit 220 and the light irradiator module 100 as follows. Define and use

The light transmittance measurement module 110 has six illuminance sensors attached to the PCB, and a Li-Polymer rechargeable battery that supplies power and a charging chip that properly distributes and manages battery charging or external power to the internal circuit and Power management chip PMIC, Bluetooth communication control chip that enables Bluetooth communication, and illumination sensor control chip and module that filters or converts the measured value of the illumination sensor into digital values and transmits data to the Bluetooth communication control chip in an I2C manner. When mounted on the housing, it consists of a charging terminal for charging, a DC jack for external power input, and a switch to turn on/off the power or start or stop sensor measurement.

For the six illuminance sensors for measuring the light transmittance, it is necessary to constantly calculate the light intensity measurement value for the same light source. For this, a calibration process for the six illuminance sensors is required. In an embodiment of the present invention, calibration is performed so that the measured values of the six illuminance sensors of the light transmission measuring module 110 for the light source of the same intensity are the same as the measured values of the illuminance meter (eg, Minolta illuminometer) used as a standard. . As it was experimentally confirmed that the characteristics of the illuminance sensor with respect to the intensity of the light source have a linear relationship as shown in FIG. 10, calibration was performed in a manner of finding and converting the proportional coefficients for each section with the standard illuminance meter for the six illuminance sensors. For example, if you compare the three-point light intensity for the No. 4 illuminance sensor, you can check the proportionality coefficient as shown in the table below.

#4 Light sensor proportionality factor BL light intensity Minolta light meter The present invention measured roughness (BLT) Minolta/BLT 5 3910 603 6.48 10 7710 1194 6.46 15 11240 1790 6.28

The battery for power used in the light transmittance measurement module 110 is also a Li-Polymer secondary battery having a capacity of 2000 mAh. The power consumption in the circuit of the light transmittance measurement module 110 is very small, so it is calculated that one week or more can be used with one charge, so that multiple experiments can be conducted without charging.

The communication protocol for Bluetooth wireless communication for controlling the optical transmittance module defines and uses the following packet structure. In the embodiment of the present invention, a 10-byte communication packet is defined and used between the main controller and the RF control unit as follows, and an 8-byte communication packet is defined and used between the RF control unit and the light transmission measurement module as follows.

The skin change measurement module 120 has six color sensors attached to the PCB, and a Li-Polymer rechargeable battery that supplies power, a charging chip that properly distributes battery charging or external power to the internal circuit, and a charging chip and Power management chip PMIC, LED driver IC to drive white LED for color sensor lighting, Bluetooth communication control chip enabling Bluetooth communication, and I2C method for filtering or converting color sensor measurement values into digital values and Bluetooth communication control chip In order to properly operate the color sensor control chip and the color sensor, three LEDs for white lighting are attached at intervals of 120 degrees around the color sensor. It consists of a DC jack for power input, and a switch to turn the power on and off or start or stop sensor measurement.

The skin change measurement module 120 is equipped with six color sensors, and each color sensor detects RGB colors to express colors or express them as brightness values. The six color sensors are also calibrated against the same reference color chip (Macbeth color chart).

In this embodiment, in order to quantify the degree of skin blackening after the light irradiation experiment, it is decided to express the brightness L value in the Lab color system, and an example of calibrating it will be described below.

Calibration process for constant calculation of brightness (L) for skin

In order to extract the brightness represented by the L value in the Lab color system, it is converted to match the L value of the standard colorimeter (Delfin ColorCatch).

Measured based on the gray color between white and black, which is related to the brightness in the Macbeth standard color table.

For each of the six sensors, white (maximum value), black (minimum value) and gray values in 6 steps are measured with the color sensor and standard colorimeter of the present invention.

The maximum and minimum values of the measured values of the color sensor of the present invention are mapped to values between 255 and 0, and a conversion function is obtained for each sensor to match the values of the standard colorimeter in sections.

For example, each gray chart measurement by a standard colorimeter is

R,G,B,L = ( 31,37,39,14 ) ( 46,82,74,33 ) ( 115,125,113,51 )

( 158,173,157,70 ) ( 204,216,195,85 ) ( 246,243,239,96 )

The raw data values of R, G, B measured by Sensor 1 of BL Tester are,

The function that converts Black ( 3376, 5183, 6259 ) and White ( 11507, 19236, 21421 ) to 0~255 is as follows.

R = (255-0)/(11507-3376)*(Rr-3376)

G = (255-0)/(19236-5183)*(Gr-5183)

B = (255-0)/(21421-6259)*(Br-6259)

Rr,Gr,Br of each gray chart for sensor1 is,

Rr,Gr,Br = (3376, 5183, 6259) ( ) ( )

( ) ( ) ( 11507, 19236, 21421 ), and the L value calculated using R, G, B of each gray chart calculated using the conversion function is,

R,G,B,L = ( 0, 0, 0, 0 ) ( 15,16,16, 4.6 ) ( 41,42,43, 17 )

( 88,92,94, 39) ( 159,163,167, 67 ) ( 255,255,255,100)

Here, as shown in the table below, section calibration is performed by obtaining a section linear function so that the L value of sensor 1 is converted to the L value of the standard colorimetric system.

Color sensor of the present invention Standard colorimeter ColorCatch One 0 14 2 4.6 33 3 17 51 4 39 70 5 67 85 6 100 96

The final L value can be calculated by the function L defined according to the L’ value of sensor 1 according to the section.

0 < L’ ≤ 4.6 L = (33-14)/(4.6-0)*(L’-0)+14

4.6< L’ ≤ 17 L = (51-33)/(17-4.6)*(L’-4.6)+33

17< L’ ≤ 39 L = (70-51)/(39-17)*(L’-17)+51

39< L’ ≤ 67 L = (85-70)/(67-39)*(L’-39)+70

67< L’ ≤ 100 L = (96-85)/(100-67)*(L’-67)+85

11 is a graph showing the brightness L calibration conversion graph of the color sensor of the skin change measuring module 120 of the present embodiment.

Hereinafter, calibration is performed in the same manner for the other sensors 2 to 6 as well.

The battery for power used in the skin change measurement module 120 is also a Li-Polymer secondary battery having a capacity of 2000 mAh. Since the power consumption in the circuit of the skin change measurement module 120 is very small, it is calculated that one week or more can be used with one charge, so that multiple experiments can be conducted without charging.

The communication protocol for Bluetooth wireless communication for skin change measurement module control defines and uses the following packet structure. In the embodiment of the present invention, a 10-byte communication packet is defined and used between the main controller and the RF control unit as follows, and an 8-byte communication packet is defined and used between the RF control unit and the light transmission measurement module as follows.

As described above, the present invention relates to an experimental device for observing the effect of irradiating a light source in a specific wavelength band on the skin, and relates to a clinical laboratory device mainly used to check the efficacy of general cosmetics or functional blocking agents having a light blocking effect.

To this end, the present invention provides a light irradiation module 100 for irradiating a light source in a specific wavelength band, a light transmittance measurement module 110 for measuring the intensity of the light source, and skin color to check the condition of the skin affected by the light source. It consists of a skin change measurement module 120 capable of measuring the amount of change and a control device 200 capable of controlling these various modules, and function control or data collection between the control device 200 and each function module 100, 110, 120 For communication, Bluetooth wireless communication technology is used.

As described above, the preferred embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope of the present invention in addition to the above-described embodiments is common knowledge in the art. It is self-evident to those who have it.

Therefore, the above-described embodiments are to be regarded as illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description but may be modified within the scope of the appended claims and their equivalents.

100...Light irradiation module 110...Light transmittance measurement module
120...Skin change measurement module 200...Control device
210...Main control unit 220...RF control unit

Claims (5)

A light irradiation module that provides a plurality of UV or blue light LED light sources;
a light transmittance measurement module capable of measuring the amount of light;
a skin change measurement module for quantitatively measuring the degree of change after the light irradiation experiment on the skin; and
a control device for integrally controlling the modules by transmitting a control command and data through Bluetooth communication;
Skin light irradiation experiment device using Bluetooth wireless technology, characterized in that it comprises a. The method of claim 1,
The main controller and a plurality of modules are controlled in a one-to-many format through Bluetooth wireless communication, and a skin light irradiation experiment device using Bluetooth wireless technology, characterized in that it can receive measurement data. 3. The method according to claim 1 or 2,
The light irradiation module includes a plurality of individually controllable UV or blue light LED light sources and is driven by a rechargeable secondary battery, and in the control device, each light source is operated according to the set light irradiation intensity, irradiation time, and number of repetitions. Skin light irradiation experiment device using Bluetooth wireless technology. 3. The method according to claim 1 or 2,
The light transmittance measurement module is equipped with a plurality of light quantity measurement sensors to apply a light blocking agent for an in vitro experiment as a light source by a light irradiation module to an experimental plate and to observe light transmission characteristics or light blocking characteristics, The measured data is displayed on the display device of the control device or is stored in the memory device. 3. The method according to claim 1 or 2,
The skin change measurement module is equipped with a plurality of color measurement sensors to detect color or calculate brightness to measure quantified data, and the measured data is displayed on a display device of a control device or stored in a memory device, characterized in that Skin light irradiation experimental device using Bluetooth wireless technology.

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