KR100923657B1 - Apparatus for measuring skin condition using chip led - Google Patents

Abstract

It is an object of the present invention to provide a skin measuring apparatus capable of optimizing the spatial arrangement in disposing a light source for measuring the state of human skin in the skin measuring apparatus.

The present invention for realizing this, an image magnification lens for focusing the light reflected from the skin and the image detection device for converting the light passing through the image magnification lens into an electrical signal and the image of the digitized skin through the image detection device In the skin measurement device comprising an image processing device for analyzing the light source, the light source of the light irradiated to the skin is characterized in that a plurality of chip LED.

Skin measurer, chip LED, polarization filter, lens, imaging device

Description

Skin measuring device using chip LED {APPARATUS FOR MEASURING SKIN CONDITION USING CHIP LED}

The present invention relates to a skin measurement apparatus capable of measuring the skin condition of the human body, and more particularly, to a skin measurement apparatus using a chip LED mounted on a printed circuit board or a flexible printed circuit board as a light source for skin irradiation. will be.

In general, a skin measurement apparatus for measuring and diagnosing the condition of human skin includes enlarging the skin through a lens, digitizing the enlarged skin image through an image detection device such as a CCD, and analyzing the digitized skin image. It consists of a computer or a dedicated image processing device.

Through the skin measurement apparatus, detailed skin condition information such as distribution form and size of wrinkles of skin and distribution form and size of pores can be obtained. In order to analyze the state information of the skin, light irradiated to the skin acts as an important component. The light irradiated to the skin should be distributed evenly on the skin. If the selection and placement of the light source is not good, the light distribution on the skin surface will be stained, making it difficult to analyze the average skin condition. I can deliver it. In addition, the amount of light irradiated to the skin surface should be more than a certain amount, and if the amount of light is not enough, the information of the skin is not sufficiently secured in the image detection step.

In general, a light emitting diode (hereinafter referred to as 'LED') is used as a light source for irradiating the skin surface. A plurality of LEDs are disposed in a circle around the lens barrel provided to enlarge the skin surface to irradiate light on the skin. The LEDs are mounted on a printed circuit board (PCB) so that the direction of the light is perpendicular to the skin. The LED mounted on the printed circuit board emits light toward the skin.

However, in order to clearly observe the skin condition, the direction of light should be inclined at a minimum angle with the skin so that the appearance of wrinkles and pores of the skin can be clearly observed (hereinafter referred to as the 'measuring effect'), and the LED is placed perpendicular to the skin. If there is a disadvantage that the shape is not clearly expressed.

In addition, the LED itself has a structure in which the light emitting diode is molded using a transparent plastic material, and thus there is a stripe of light having a halo shape on the light itself irradiated by the LED due to the difference in the molding density distribution of the plastic material.

Therefore, the dome-shaped cap is used to focus the light toward the skin in order to obtain the side emitting effect and to remove the halo shape, so that the reflection and concentration of light can be made inside the dome-shaped cap. Mirror coating material is applied.

However, when the lens is wide-angle or the focal length is short, there is a disadvantage that the dome-shaped cap is difficult to arrange due to the limitation of the spatial arrangement. In addition, the internal dome shape must be precisely formed, and the production cost increases due to the application of a mirror coating material. In addition, diffuse reflection is made through the dome-shaped mirror image, and light is introduced into the lens, making it difficult to observe the skin condition.

On the other hand, a mobile phone or a personal digital assistant (PDA) equipped with a camera generally uses a wide-angle lens to secure a wide field of view in order to acquire an image. In this case, when the magnifying lens for skin measurement is mounted in front of the camera lens unit of the mobile phone or PDA, the barrel height of the magnifying lens assembly should be considerably smaller due to the wide viewing angle. This is because, when the height of the barrel of the magnifying lens assembly is increased, the diameter of the lens must be increased in order to secure the overall viewing angle due to the wide angle. In addition, when the height of the magnifying lens assembly barrel is small, the focal length between the lens and the skin surface is also small, so that the overall length of the dome-shaped cap must be shortened. However, when the total length of the barrel and the cap of the magnifying lens assembly is reduced, it is difficult to arrange around the magnifying lens assembly barrel due to the size of the LED.

In addition, when the skin is measured using a polarizing filter, the diffuse reflection inside the dome-shaped cap should not occur because the polarized light should irradiate only the skin direction. Therefore, the LED is placed at an angle toward the skin at this time. However, even at this time, due to space constraints, the angle of the LED is not easily adjusted, which increases the complexity in the assembly process.

The present invention has been made to solve the above-mentioned problems, the object of the present invention is to provide a miniaturized skin measurement device to optimize the spatial arrangement in using the LED as a light source for measuring the state of human skin.

Another object of the present invention is to provide a skin measuring apparatus capable of maximizing the side of the light source to the skin surface in order to clearly check the condition of the skin.

Skin measuring apparatus of the present invention for achieving the above object, the image detection device for condensing the light reflected from the skin and the image detection device for converting the light passing through the image magnifying lens into an electrical signal to digitize and In the skin measurement apparatus comprising an image processing device for analyzing the image of the skin digitized by the image detection device, the light source of the light irradiated to the skin is characterized in that a plurality of chip LED.

In addition, the chip LED may be configured to be mounted on a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

In this case, the flexible printed circuit board on which the chip LED is mounted may be installed to be inclined with respect to the center of the skin surface to which light is irradiated.

In addition, the flexible printed circuit board on which the chip LED is mounted may be installed at the end of the cap to be perpendicular to the skin surface.

In addition, the blocking plate may be configured to block the light emitted from the chip LED is introduced into the lens.

The image magnification lens may be configured in a skin measurement module, and the image detection device and image processing device including a lens and an image pickup device may be configured in a personal portable terminal module.

According to the skin measurement apparatus of the present invention, the light source can be disposed in a minimum space by using the chip LED as a light source, and after mounting the chip LED on the flexible circuit board, the shape of the flexible circuit board is inclined to maximize the side effect. At the same time, there is no need to perform mirror coating on the inner surface of the cap, thereby reducing the manufacturing cost.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Figure 1, the skin measurement apparatus of the present embodiment, the skin measurement module is coupled to the personal portable terminal module (7). The skin measurement module includes a lens barrel (1), which is an image magnifying lens for focusing light reflected from the skin, and a printed circuit board (PCB) mounted by soldering a plurality of chip LEDs (3) around the lens barrel (1). (4), the center of the dome shape surrounding the lens barrel holder (2), the lens barrel (1) and the printed circuit board (4) for fixing the lens barrel (1) and the printed circuit board (4) It consists of a cap 6 in which an opening through which light passes is formed.

The personal mobile terminal module 7 is not a dedicated product for coupling to the skin measurement module, but is used by combining the finished product of the personal mobile terminal with a camera as it is with the skin measurement module. The personal mobile terminal module 7 is provided with a lens 8 and an imaging device (CCD) 9 for realizing a camera function of the personal mobile terminal, and focuses light passing through the lens barrel 1. It is converted into an electrical signal and input to the central processing unit. In the CPU, the skin image measured on the screen unit (not shown) is displayed. Power is supplied to the central processing unit and the printed circuit board 4 by a power supply unit.

The skin measurement apparatus according to the above configuration can shorten the length of the lens barrel 1 by using the chip LEDs 3, and a plurality of chip LEDs in a small space even when the height of the cap 6 is low. It is possible to arrange | position (3) efficiently.

On the other hand, the LED light may use a polarizing filter to observe various skin conditions, for this purpose, the polarizing filter 5 may be installed in the front skin surface direction of the chip LED (3).

Another embodiment of the present invention will be described with reference to FIG. 2.

In this embodiment, it is possible to incline and arrange the chip LED 3. In this case, since it is impossible to incline the general printed circuit board 4, a flexible printed circuit board (FPCB) is used. The flexible printed circuit board 10 is formed in a conical shape, and a plurality of chip LEDs 3 are soldered and mounted on the flexible printed circuit board 10. The plurality of chip LEDs 3 are disposed in a circular shape at a predetermined interval on the flexible printed circuit board 10.

In addition, the lens barrel 1, the lens barrel holder 2, the cap 6, and the personal portable terminal module 7 have the same configuration as in FIG.

According to this configuration, since the plurality of chip LEDs 3 are inclined toward the skin surface, the concentration of light can be improved and the light spot phenomenon of the skin surface can be significantly improved. In addition, since the side of the light is made it is possible to clearly check the skin image of the wrinkles and pores.

In this case, the cap 6 does not necessarily have to be a dome shape, and there is no need to apply a mirror surface coating on the inner surface of the dome, thereby reducing manufacturing costs.

Another embodiment of the present invention will be described with reference to FIG. 3.

The skin measurement apparatus of this embodiment shows a structure in which the flexible printed circuit board 10 having the chip LEDs 3 is provided inside the opening, which is the end of the cap 6, i.e., the portion perpendicular to the skin surface. In this case, the entire length of the flexible printed circuit board 10 is formed to be the same as the opening circumference of the cap 6. In addition, the small chip LED (3) is soldered and attached to the flexible printed circuit board 10, and the chip resistor for the chip LED circuit is attached to the individual LEDs. In this case, the chip resistance does not necessarily need to be attached to the flexible printed circuit board 10, and may be configured on a separate circuit board outside the flexible printed circuit board 10.

The flexible printed circuit board 10 to which the chip LEDs 3 are attached is fixed to the inner vertical surface of the opening by using an adhesive or double-sided tape.

At this time, since the chip LED (3) of the flexible printed circuit board 10 attached to the cap (6) should be irradiated to the skin surface direction, the LED light is irradiated toward the lens barrel (1) and the image pickup device (9) In order to prevent the obstruction plate 11 is preferably provided in the lens direction. It is necessary to appropriately adjust the inner diameter of the shielding plate 11 so that the skin surface is not covered.

The polarization filter 5 may be attached to the front skin surface of the chip LED 3.

Referring to FIG. 4, a plurality of holes 12 are formed in the polarization filter 5 along the circumference thereof, so that the light of the chip LED 3 passing through the holes 12 is unpolarized light, and the polarization is performed. Light passing through the body of the filter 5 becomes polarized light.

A wire for supplying power to the chip LED 3 attached to the flexible printed circuit board 10 or a wire for selecting the chip LED 3 to be polarized or non-polarized light is posted along the inner surface of the cap 6. Can be.

Another embodiment of the present invention will be described with reference to FIG. 5.

1 to 3 illustrate an embodiment in which the skin measurement module is used in combination with a personal portable terminal, but in FIG. 5, the skin measurement module is connected to a personal computer (PC), a notebook computer, or a dedicated image processing device instead of a personal portable terminal. It may be used to indicate.

In this case, the lens barrel 1, the printed circuit board 4 on which the chip LEDs 3 are mounted, the polarization filter 5, the lens barrel holder 2 and the cap 6 are implemented in FIGS. It is the same as the example, and also provided with the structure of the skin measuring body 13 which contains the lens 8 and the imaging element 9 further.

1 is a schematic cross-sectional view of a skin measurement apparatus using a chip LED according to an embodiment of the present invention,

2 is a schematic cross-sectional view of a skin measurement apparatus using a chip LED and a flexible printed circuit board according to another embodiment of the present invention;

3 is a schematic cross-sectional view of a skin measurement apparatus using a chip LED and a flexible printed circuit board according to another embodiment of the present invention;

4 is a plan view showing an installation state of a polarization filter and a chip LED according to the present invention;

5 is a cross-sectional view showing another embodiment of a skin measurer according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: lens barrel 2: lens barrel holder

3: Chip LED 4: Printed Circuit Board (PCB)

5: polarization filter 6: cap

7: personal mobile phone 8: lens

9: Imaging Device (CCD) 10: Flexible Printed Circuit Board (FPCB)

11: blanking plate 12: hole

13: skin meter body

Claims (7)

An image magnifying lens for focusing light reflected from the skin, an image detecting device for converting light passing through the image magnifying lens into an electrical signal, and an image processing device for analyzing an image of the digitized skin through the image detecting device. In the skin measurement apparatus configured, the light source of the light irradiated to the skin is a plurality of chip LEDs, the plurality of chip LEDs spaced a predetermined interval on the flexible printed circuit board (FPCB) is installed to surround the image magnifying lens. And the image magnification lens is configured in the skin measurement module, and the image detection device and the image processing device including the lens and the image pickup device are configured in the personal portable terminal module. The skin measurement apparatus according to claim 1, wherein the chip LED is mounted on the flexible printed circuit board in the form of a cone to be inclined toward the center of the skin surface to which light is irradiated. An image magnifying lens for focusing light reflected from the skin, an image detecting device for converting light passing through the image magnifying lens into an electrical signal, and an image processing device for analyzing an image of the digitized skin through the image detecting device. In the skin measurement apparatus configured, the light source of the light irradiated to the skin is a plurality of chip LED, the plurality of chip LED is predetermined on a flexible printed circuit board (FPCB) installed to be perpendicular to the skin surface inside the opening which is the end of the cap. The image magnification lens is disposed spaced apart from each other, the image magnification lens is configured in the skin measurement module, the image detection device and image processing device including a lens and an image pickup device is a skin measurement device, characterized in that configured in the personal portable terminal module. 4. The skin measuring apparatus of claim 3, wherein a shielding plate is installed to block the light emitted from the chip LED from flowing into the image magnifying lens. delete delete delete

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