KR101779264B1

KR101779264B1 - Biological information measurement device using sensor array

Info

Publication number: KR101779264B1
Application number: KR1020150180337A
Authority: KR
Inventors: 김선국; 이성호; 이민구; 홍성인
Original assignee: 경희대학교 산학협력단; 전자부품연구원
Priority date: 2015-12-16
Filing date: 2015-12-16
Publication date: 2017-09-18
Also published as: KR20170072018A

Abstract

A sensor array including a plurality of photoreactive sensors amplifying photoreactivity of light reflected or transmitted from the skin tissue and outputting absorption information associated with tissue activity and function of the skin tissue with respect to the amplified light; And a sensor array for measuring an average value of the biometric information with respect to the sensor array based on the absorbed information.

Description

TECHNICAL FIELD [0001] The present invention relates to a biometric information measuring apparatus using a sensor array,

The present invention relates to an apparatus for measuring bio-information using a sensor array, and more particularly, to a bio-information measuring apparatus using a sensor array, which uses an absorption information output from a sensor array including a plurality of photoreactive sensors for amplifying photoreactivity, The present invention relates to a biometric information measuring apparatus using a sensor array for measuring a value.

Oxygen saturation refers to the percentage of erythrocytes in which hemoglobin and oxygen are actually bound, expressed as a percentage (%). The normal range of oxygen saturation is 97 to 100%, and if it is less than 90%, hypoxia is suspected.

Conventional oxygen saturation testing methods for preventing or treating diseases related to oxygen saturation include invasive methods such as Arterial Blood Gas Analysis (ABGA) and non-invasive pulse oximeter tests, Pulse oximetry, an invasive test method, has been preferred.

The principle of pulse oximeter to measure heart rate and oxygen saturation is to measure pulses in arterial and capillary blood vessels from pulse waves (pulse waves accompanied by heart beat) that are made by changes in blood volume and to measure oxygenated hemoglobin (O ₂ Hb) and reduced hemoglobin (hemoglobin separated from oxygen) by measuring the oxygen saturation (SpO ₂ ).

Conventional pulse oximeter techniques employing the principle of measurement of pulse oximeter were mainly used as a finger pulse oximeter and a chest strap heart rate monitor.

Conventional Finger Pulse Oximeter is a device for percutaneous measurement of blood oxygen saturation using light detection by a probe worn on the finger of a user (patient). It is a device that detects the wave form produced by the pulsating blood, The pulse is measured at a cycle indicated by a blood volume fluctuation waveform.

In addition, the conventional chest strap heart rate monitor is an optical measurement method using an electrode included in a strap surrounding a chest, and measures a pulse at a cycle represented by a waveform generated by a reflected light source in a heart region.

However, the conventional finger pulse oximeter is difficult to be worn continuously by the finger measurement method. There is a limitation in monitoring when the baby is worn, there is a limit to the measurement of the heartbeat and oxygen saturation for the exercise intensity, There was a problem.

In addition, the conventional chest strap heart rate monitor can be continuously worn, but it can be continuously monitored due to the inconvenience of the wearing feeling and cumbersome usage method. However, there is a feeling of heterogeneity of wearing, .

In order to overcome the problems of the prior art, a pulse oximeter technique for measuring oxygen saturation and heart rate by attaching to the body has been developed. However, in the conventional pulse oximeter technique, a single sensor is used to measure the oxygen saturation and heart rate of the body, There is a limitation that only a certain portion (area) of the body corresponding to the size (area) of a single sensor can be measured, and a problem that the measurement value of the biometric information including oxygen saturation and heartbeat varies depending on the attachment position or area of the body .

In addition, the conventional pulse oximeter technique has a problem in that it is impossible to measure the temperature of various parts of the body, and there is a limit that can not be accurately measured to the first digit of oxygen saturation and heartbeat, There is a limit to the reliability of

Korean Patent Laid-Open No. 10-2015-0068333 (May 2015.06.19), " Bio-impedance sensor array for heart rate detection and its operation method " Korean Patent No. 10-0826187 (Apr. 23, 2008), " a mobile terminal having a bio-information measuring device and a bio-information measuring function, a remote control device having a bio-information measuring function, Korean Patent Publication No. 10-2014-0038931 (Apr. 31, 201), "Apparatus, system, and method for measuring oxygen saturation of tissues and perfusion imaging"

The present invention relates to a biometric information measuring apparatus using a sensor array capable of measuring biometric information including heartbeat and oxygen saturation for skin tissue in a non-invasive manner in a short time by sensing the reflectivity or transmittance of light reflected from the skin tissue .

In addition, the present invention measures the absorption information of the skin tissue accurately with respect to the part to be measured by the user using the body-attached bio-information measuring device which is flexible and has good biocompatibility and does not slip on the skin, And to provide a biometric information measuring device using a sensor array capable of transmitting an average value of the measured biometric information to the outside and treating and preventing the biometric information in real time.

The present invention also relates to a photoconductor which uses a transition metal chalcogenide compound as a material of a channel region and amplifies photoconductivity through a local gate electrode and a non-overlap region operating as a photoconductor in a non-overlapping channel region, And a photoreactive sensor including an optical amplification phototransistor to which a transistor is coupled.

In addition, the present invention provides a sensor array that includes a plurality of photoreactive sensors and is manufactured in the form of a patch. The sensor array can measure an accurate oxygen saturation and a heartbeat (pulse) with respect to a contact area of a skin tissue Information measuring apparatus.

In addition, the present invention measures the wide contact area of skin tissue to be measured based on a plurality of photoreactive sensors, the average value of oxygen saturation and heartbeat of various tissues with respect to various parts, A bio-information measuring device using a sensor array capable of reducing an error to the bio-information measuring device.

A biometric information measuring apparatus using a sensor array according to an embodiment of the present invention includes a light source unit for generating light and a switching thin film transistor connected to the light source unit for amplifying optical reactivity of light generated from the light source unit, And a plurality of photoreactive sensors for outputting absorption information for mapping biometric information related to tissue activity and function of the skin tissue with respect to amplified light having reactivity, And an average value measuring unit for measuring an average value of the biometric information for the sensor array based on the absorption information output from the photoreactive sensor.

The photoreactive sensor according to one embodiment may include one or more optical amplification phototransistors arranged in an active matrix form.

The optical amplification phototransistor according to an embodiment includes a channel region formed between a local gate electrode, a source electrode, a drain electrode, and the source electrode and the drain electrode, and includes a non-overlap region that is not overlapped with the gate electrode Channel region, and the non-overlap region may operate as a photo conductor that amplifies photoconductivity.

The non-overlap region may be formed in both lateral directions of the source electrode and the drain electrode, or may be formed in one of the lateral direction of the source electrode and the drain electrode.

The channel region according to an exemplary embodiment may be formed of a transition metal chalcogenide compound.

The biometric information according to one embodiment may be associated with tissue activity and function associated with at least one of heart rate and oxygen saturation.

The sensor array according to an embodiment may be formed in a patch-like structure by being connected to an IC circuit formed on the substrate.

The substrate according to an exemplary embodiment may be formed of at least one of paper, polymer, woven fabric, and metal foil.

The apparatus for measuring bio-information using a sensor array according to an embodiment of the present invention includes a communication module for transmitting an average value of the measured biometric information to the outside, and a control module for controlling the plurality of photoreactive sensors And a controller for controlling the average value measuring unit to measure the average value of the biometric information based on the absorption information measured by the at least one photoreactive sensor selected from among the photoreactive sensors.

According to the embodiment of the present invention, biometrics information including heart rate and oxygen saturation for skin tissue can be measured in real time in a non-invasively short time by sensing the reflectance or transmittance of light reflected from the skin tissue.

According to the embodiment of the present invention, absorption information of the skin tissue is accurately measured on a site to be measured by a user using a body-attached bio-information measuring device which is flexible and has good biocompatibility and does not slip on the skin, The average value of the measured biometric information is transmitted to the outside based on the absorption information, and treatment and prevention according to the biometric information can be performed in real time.

Further, according to an embodiment of the present invention, there is also provided a method of manufacturing a semiconductor device, which uses a transition metal chalcogenide compound as a material of a channel region and amplifies photoconductivity through a non-overlap region operating with a local gate electrode and a non- A photoconductor, and a photoreactive sensor including an optical amplification phototransistor coupled with a phototransistor.

Also, according to the embodiment of the present invention, a sensor array including a plurality of photoreactive sensors can be manufactured in a patch shape, and accurate oxygen saturation and heart rate (pulse) can be measured with respect to the contact area of the skin tissue .

According to an embodiment of the present invention, a wide contact area of skin tissue to be measured based on a plurality of photoreactive sensors, an average value of oxygen saturation and heartbeat of various tissues with respect to various parts are measured, It is possible to reduce errors in different absorption information.

FIG. 1 illustrates an embodiment of a biometric information measuring apparatus using a sensor array according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a biometric information measuring apparatus using a sensor array according to an embodiment of the present invention. Referring to FIG.
FIG. 3 illustrates a detailed configuration of a sensor array according to an embodiment of the present invention.
4 illustrates a structure and a circuit diagram of a photoreactive sensor-based sensor array according to an embodiment of the present invention.
5 is a graph showing average values measured through a sensor array including a photoreactive sensor according to an embodiment of the present invention.
6 illustrates an optical amplification phototransistor of a photoreactive sensor according to an embodiment of the present invention.
7 is a circuit block diagram of an optical amplification phototransistor of a photoreactive sensor according to an embodiment of the present invention.
8 is a graph showing characteristics of a photoconductor of an optical amplification phototransistor according to an embodiment of the present invention.
9 is a transfer curve graph of an optical amplification phototransistor according to an embodiment of the present invention.
Figure 10 shows a graph of photoreactive properties.
11 illustrates the sensitivity of the optical amplification phototransistor according to the non-overlap length according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

As used herein, the terms " an embodiment, " " an embodiment, a side, " " an example ", and the like, are not necessarily to be construed as advantageous or advantageous over other aspects or designs .

Also, the term 'or' implies an inclusive or 'inclusive' rather than an exclusive or 'exclusive'. That is, unless expressly stated otherwise or clear from the context, the expression 'x uses a or b' means any of the natural inclusive permutations.

Also, the phrase "a" or "an ", as used in the specification and claims, unless the context clearly dictates otherwise, or to the singular form, .

Furthermore, the terms first, second, etc. used in the specification and claims may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminology used herein is a term used for appropriately expressing an embodiment of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

FIG. 1 illustrates an embodiment of a biometric information measuring apparatus using a sensor array according to an embodiment of the present invention.

Referring to FIG. 1, an apparatus 100 for measuring bio-information using a sensor array according to an embodiment of the present invention includes a sensor array 120.

The sensor array 120 is formed on a substrate including a plurality of photoreactive sensors. Here, the photoreactive sensor is connected to the switching thin film transistor, amplifies photoreactivity of the light reflected or transmitted from the skin tissue, generated from the light source unit, and transmits biometric information related to the tissue activity and function of the skin tissue And outputs absorption information for mapping.

A biometric information measuring apparatus 100 using a sensor array according to an embodiment of the present invention may include a light source unit (not shown), an average value measuring unit (not shown), a communication module ), A control unit (not shown), and a power supply unit (not shown).

The light source unit may generate a light source, and the average value measuring unit may measure an average value of the biometric information with respect to the sensor array 120 based on absorption information output from the photoreactive sensor.

In addition, the communication module may transmit the average value of the measured biometric information to the outside, and the control unit may control to measure an average value of the biometric information, and the power supply unit may include a light source unit, an average value measurement unit, The control unit can supply at least one of the driving power.

1, an apparatus 100 for measuring bio-information using a sensor array according to an exemplary embodiment of the present invention includes at least one of an absorbance information output from a photoreactive sensor and an average value of biometric information measured from an average value measuring unit (B) to the terminal (200).

The terminal 200 may transmit information on heart rate and oxygen saturation to the user (patient) based on at least one of the absorption information and the average value of the biometric information received from the living body information measuring apparatus 100 using the sensor array As shown in FIG.

For example, the terminal 200 may receive at least one of the absorption information and the average value of the biometric information received from the biometric information measuring apparatus 100 using the sensor array based on the reference value for the predetermined heart rate and oxygen saturation And may provide the user with at least one of a numerical value, a value, a percentage, an image, a picture, a graph, and a message. You may.

Also, the terminal 200 may control the bio-information measuring apparatus 100 using the sensor array according to a command input from a user.

For example, the terminal 200 may transmit a control command (e.g., a pulse) to the bio-information measuring apparatus 100 using the sensor array so as to measure the pulse oximeter including the heartbeat and oxygen saturation of the user based on a command input from the user (a) to control the light source to generate light in order to measure the average value of the pulse oximeter accordingly.

In addition, the terminal 200 can control to select any photoreactive sensor according to a part of the body to be measured out of a plurality of photoreactive sensors, and to control the sensor array including the photoreactive sensor with a control command (a) .

According to an embodiment, the terminal 200 may be at least one of a terminal, a smart phone, a tablet PC, and a PC carried by the user, but is not limited thereto.

Also, the terminal 200 may transmit at least one of the absorption information and the average value of the biometric information received from the biometric information measuring apparatus 100 using the sensor array to an integration server (not shown).

The integration server manages at least any one of the absorption information and the average value of the biometric information received from the terminal 200, analyzes the change of the user's data and health state, and transmits the analysis to the terminal 200.

In addition, the integration server can provide the user's data to healthcare professionals, hospitals, health centers, and specialists for healthcare guidance. Based on the analyzed data, the user can select the appropriate exercise, food, lifestyle and prescription Or at least one of them may be provided.

Also, according to the embodiment, the configuration of the integrated server may be performed in the terminal 200 as well.

FIG. 2 is a block diagram illustrating a configuration of a biometric information measuring apparatus using a sensor array according to an embodiment of the present invention. Referring to FIG.

2, an apparatus 100 for measuring bio-information using a sensor array according to an embodiment of the present invention outputs absorption information for matching biometric information related to tissue activity and function of skin tissue, The average value of the biometric information is measured.

The apparatus 100 for measuring bio-information using the sensor array according to an embodiment of the present invention includes a light source 110, a sensor array 120, and an average value measuring unit 130.

The light source unit 110 generates light. Here, the light may be reflected or transmitted to skin tissue, and may be infrared light or ultraviolet range light sensed by the photoreactive sensor.

The sensor array 120 is connected to the switching thin film transistor and amplifies the photoreactivity of the light generated from the light source unit 110 reflected or transmitted from the skin tissue, and the photoreactivity of the tissue array activity And a plurality of photoreactive sensors for outputting absorption information for mapping the biometric information associated with the function.

For example, the light generated by the light source 110 is reflected or transmitted from the skin tissue and is incident on the photoreactive sensor attached to the skin tissue. The photoreactive sensor amplifies the photoreactivity of the incident light, Can be output.

The sensor array 120 may be formed in a patch-like structure by being connected to an IC circuit formed on the substrate.

IC circuits can process signal filtering, amplification, digitization and processing functions by using integration techniques. Depending on the embodiment, the IC circuitry may be an integrated and multi-functional integrated circuit sensor that processes signals in the substrate.

In addition, the patch-type structure may be implemented in various sizes and shapes depending on the area and characteristics of the adhesive portion of the body surface, and may include a medical skin contact adhesive suitable for application to the skin. The patch- Rectangular, rectangular, rhombic, cruciform, curved, and alphabet X-shaped.

The substrate of the bio-information measuring apparatus 100 using the sensor array according to the embodiment of the present invention may include the sensor array 120 and may be formed of at least one material selected from the group consisting of paper, polymer, woven fabric, As shown in FIG.

According to an embodiment, the substrate can be a plexible substrate that can be attached to the skin, and can be made of a material selected from the group consisting of polyimide, polycarbonate, polyacrylate, polyetherimide, and may be made of at least one of polyethersulfone, polyethyleneterephthalate, and polyethylene naphthalate.

Since the materials described above can be used at a high process temperature of 450 캜 or more, deterioration of the characteristics of the optical amplification phototransistor can be minimized in manufacturing an optical amplification phototransistor.

Further, since the flexible substrate has a property of being warped or stretched by heat, it is difficult to precisely form a pattern of the optical amplifying phototransistor thereon.

Accordingly, the artificial skin sensor of the present invention can spin or coat a liquid polymer material on a sacrificial layer to manufacture a flexible substrate, thereby relieving heat or mechanical shock.

Hereinafter, the sensor array 120 will be described in detail with reference to FIG.

FIG. 3 illustrates a detailed configuration of a sensor array according to an embodiment of the present invention.

Referring to FIG. 3, the sensor array 120 includes a plurality of photoreactive sensors 170, the photoreactive sensor 170 includes an optical amplifying phototransistor 180, and is coupled to the switching thin film transistor 160 .

In addition, the photoreactive sensor 170 may be connected to a driving voltage Vdd, a scan signal Scan, and a gate-bias.

Depending on the embodiment, the sensor array 120 may include a plurality of photoreactive sensors 170, but the number, area, size, and shape of the photoreactive sensors 170 may vary depending on the embodiment, It is not. Hereinafter, the photoreactive sensor 170 and the switching thin film transistor 160 will be described in detail with reference to FIG.

4 illustrates a structure and a circuit diagram of a photoreactive sensor-based sensor array according to an embodiment of the present invention.

More specifically, FIG. 4A illustrates a structure of a photoreactive sensor-based sensor array according to an embodiment of the present invention, and FIG. 4B illustrates a circuit diagram of a photoreactive sensor-based sensor array according to an embodiment of the present invention. It is.

Referring to FIG. 4A, the biometric information measuring apparatus using the sensor array of the present invention includes a photoreactive sensor 170 and a switching thin film transistor 160 including one or more optical amplifying phototransistors arranged in an active matrix form.

The sensor array 120 based on the photoreactive sensor 170 may include a photoreactive sensor with DC biases arranged in a matrix form to maximize the photoresponse properties of the circuitry that outputs the absorbance information. (Not shown).

In addition, when a gate pulse signal of light scattered by the skin tissue is supplied to the switching TFT 160, the switching TFT 160 is turned on, and the light reactivity of the drain of the switching TFT 160 The sensor 170 is turned on in response to light absorption, and the capacitor 190 can be reset by the reference voltage.

In addition, the photoreactive sensor 170 can sense the light reflected by the skin tissue to amplify photoreactivity, and can output an on / off state according to the absorption state of the sensed light, Information can be output.

4B, in the photoreactive sensor-based sensor array, the gate of the switching thin film transistor 160 arranged in a matrix form is connected to the gate line, and the source of the switching thin film transistor 160 is connected to the data line And the drain of the switching thin film transistor 160 is connected to the source of the optical amplification phototransistor 180.

The photoreactive sensor-based sensor array can operate as a shift register while each bus line is connected to an external touch-out IC (R / O IC).

In addition, the gate line and the data line of the photoreactive sensor-based sensor array are connected to the gate driving circuit and the data driving circuit, respectively, and each connected line and circuit can receive the gate driving signal voltage and the input data signal voltage.

2, the average value measuring unit 130 of the bio-information measuring apparatus 100 using the sensor array according to the embodiment of the present invention measures the average value of the sensor array 120 based on the absorption information output from the photoreactive sensor, The average value of the biometric information is measured.

The average value measuring unit 130 may measure the average value of the biometric information based on the absorption information of the skin tissue measured from the plurality of photoreactive sensors.

According to the embodiment, the average value measuring unit 130 measures the average value of the integrated biometric information for different parts based on the absorption information received from the sensor array 120 attached to the skin tissues of different parts It is possible.

The biometric information may be associated with tissue activity and function associated with at least one of heart rate and oxygen saturation. The biometric information may also be referred to as a pulse oximeter.

The apparatus 100 for measuring bio-information using a sensor array according to an embodiment of the present invention may further include a communication module 150 and a controller 140.

The communication module 150 may transmit the average value of the measured biometric information to the outside.

The communication module 150 may transmit at least any one of an average value and an absorption information of biometric information with different transmission bandwidths and may transmit at least any one of zigbee, bluetooth, geo-wave, and Wi- Method can be applied.

In addition, the average value of the biometric information measured through the biometric information measuring apparatus 100 using the sensor array according to the embodiment of the present invention is transmitted from the communication module 150 to the user terminal, the integration server, And a biometric information measuring device using an array.

The control unit 140 receives from the average value measuring unit 130 the bio-information based on absorption information measured from at least one photoreactive sensor selected from a plurality of photoreactive sensors corresponding to the control command received from the communication module 150, To be measured.

For example, the control unit 140 measures the average value of the biometric information using only absorption information measured from the photoreactive sensor located at a specific portion of the sensor array 120 in response to a control command received from an external terminal The average value measuring unit 130 can be controlled.

The control unit 140 may be located on the substrate but may be located outside the substrate and may include at least one of the light source unit 110 sensor array 120, the average value measurement unit 130, and the communication module 150 Either of which can be controlled.

In addition, the bio-information measuring apparatus 100 using the sensor array according to the embodiment of the present invention may further include a power supply unit (not shown).

The power supply unit may supply the driving power of at least one of the light source unit 110, the sensor array 120, the average value measurement unit 130, the control unit 140, and the communication module 150.

For example, the power supply unit may be composed of an active element using an ultra-small charge / discharge battery or a super-capacitor.

According to an embodiment, the power supply unit may be a secondary battery such as a coin battery or a secondary battery such as a lithium-polymer battery. When the power supply unit is a secondary battery, the power supply unit may be charged by an external power source When the supply portion is a primary battery such as a coin battery, it can be replaced.

At least one of the average value measuring unit 130, the controller 140 and the power supply unit of the bio-information measuring apparatus 100 using the sensor array according to the embodiment of the present invention may be a patch type substrate, Lt; / RTI >

5 is a graph showing average values measured through a sensor array including a photoreactive sensor according to an embodiment of the present invention.

More specifically, FIG. 5 shows an average value of biometric information (pulse oximeter) measured from a bio-information measuring device including a single photoreactive sensor.

Referring to FIG. 5, the pulse oximeter value measured from the bio-information measuring device including the No. 1 sensor (photoreactivity sensor) is about 10.3, and from the bio-information measuring device including the No. 2 sensor The measured pulse oximeter value represents about 10.1.

Also, the pulse oximeter value measured from the bio-information measuring apparatus including the No. 3 sensor is about 9.8, and the pulse oximeter value measured from the bio-information measuring apparatus including the No. 4 sensor is about 10.5.

Although four sensors are illustrated in FIG. 5 as an example, the present invention is not limited to the above-described number of sensors and can be used without limitation.

That is, as shown in FIG. 5, the biometric information measuring apparatus including each single sensor changes the pulse oximeter value for the biological tissue to be measured by changing the pulse oximeter accuracy depending on the attachment position or area of the measurement target site It can be seen that there is a limit to accurate measurement.

Therefore, it can be seen that the accuracy and reliability of the average value of the calculated pulse oximeter is higher than that of the bio-information measuring apparatus composed of a single sensor, using a sensor array including a plurality of photoreactive sensors, Since the error due to external factors is small, it can be seen that the pulse oximeter with high accuracy for skin tissue can be measured uniformly.

FIG. 6 illustrates an optical amplification phototransistor of a photoreactive sensor according to an embodiment of the present invention, and FIG. 7 illustrates a circuit configuration of an optical amplification phototransistor of a photoreactive sensor according to an embodiment of the present invention.

The optical amplification phototransistor of the present invention includes a channel region including a gate electrode, a source electrode, a drain electrode, and a channel region including a non-overlapped region that is not overlapped with the gate electrode and between the source electrode and the drain electrode And the non-overlap region operates as a photo conductor for amplifying photoconductivity.

According to an embodiment, the gate electrode may be a local top gate structure or a local bottom gate structure.

6, an optical amplification phototransistor 180 having a bottom gate structure, in which an optical amplification phototransistor 180 according to an embodiment of the present invention includes a local lower gate electrode 181 formed on a substrate 186, A gate insulating layer 182 formed to cover the local bottom gate electrode 181, a source electrode 185S and a drain electrode 185D formed on both sides of the gate insulating layer 182 and a gate insulating layer 182 And a channel region 183 for forming a channel between the source electrode 185S and the drain electrode 185D.

A local bottom gate electrode 181 is formed on the substrate 186 and a gate insulating layer 182 is formed on the substrate 186 to cover the local bottom gate electrode 181. [

A source electrode 185S and a drain electrode 185D are formed on both sides of the gate insulating layer 182, respectively.

The source electrode 185S and the drain electrode 185D may be made of any one of metal and transparent conductive materials and the metal may be a metal such as gold (Au), titanium (Ti), aluminum (Al), and palladium (Pd). However, the material is not limited to this, and a metal material usable in the technical field of the present invention is preferable. The transparent conductive material may be at least one of an amorphous oxide, a crystalline oxide, a graphene, and a polymer organic material.

According to an embodiment, the local lower gate electrode 181, the source electrode 185S and the drain electrode 185D may be made of a transparent conductive material, such as indium zinc oxide (IZO), indium thin oxide ), And graphene.

The channel region 183 is formed on the gate insulating layer 182 so that a channel is formed between the source electrode 185S and the drain electrode 185D and a nonoverlap region (not overlapped with the local bottom gate electrode 181) (184).

As shown in FIG. 7, the non-overlap region 184 of the optical amplification phototransistor 180 of the present invention acts like an external series resistor even if a bias is applied to the gate electrode when the non-overlapping region is not applied. However, the non-overlapped region 184 acts as a photo conductor that lowers the resistance and increases conductivity when light is applied to amplify the photoconductivity.

The channel region 183 may be formed of a material including at least one of transition metal chalcogenide compounds, silicon (Si), and silicon oxide, and the transition metal chalcogenide compound may be a single layer or a multi- May be multi-layered.

Two-dimensional materials are relatively easy to fabricate when compared to one-dimensional materials, making them suitable for use as materials for next-generation nanoelectronic devices. Of these two-dimensional materials, 2D transition metal dichalcogenides include molybdenum disulfide (MoS2), molybdenum diselenide (MoSe2), tungsten diselenide (WSe2), and molybdenum diselenide Molybdenum Ditelluride (MoTe2), and tin diselenide (SnSe2).

In addition, the two-dimensional transition metal chalcogenide compound can absorb light of wavelengths below 1500 nm because it has a band gap generally below 2 eV.

Although the non-overlap region 184 of the optical amplification phototransistor 180 according to the embodiment of the present invention shown in FIG. 6 is formed in both lateral directions of the source electrode 185S and the drain electrode 185D, And the non-overlap region 184 of the optical amplification phototransistor may be formed on either of the source electrode 185S and the drain electrode 185D.

In the optical amplification phototransistor 180 of the present invention, the multilayered transition metal chalcogenide compound is preferably three or more layers.

8 is a graph showing characteristics of a photoconductor of an optical amplification phototransistor according to an embodiment of the present invention. FIG. 8A is a characteristic graph when green light (532 nm) is irradiated, and FIG. 8B is a characteristic graph when red light (638 nm) is irradiated.

Referring to FIG. 8, when the light is irradiated, the optical amplification phototransistor according to the embodiment of the present invention shows a tendency that the resistance is lowered and the conductivity is increased in comparison with the case where no light is irradiated. Further, the larger the wavelength of the irradiated light, the larger the magnitude of the drain current.

FIG. 9 shows a transfer curve graph of an optical amplification phototransistor according to an embodiment of the present invention, and FIG. 10 shows a graph of photoreactive characteristics.

Referring to FIGS. 9 and 10, when a light is applied, not only a channel region where an electron-hole pair overlaps a local gate electrode, but also a non-overlap region of a channel region acting as a photoconductor As a result, the conductivity of the entire channel is amplified, and not only the off-current of the phototransistor but also the on-current largely increases.

As shown in FIGS. 9 and 10, the optical amplifying phototransistor including the local gate electrode structure of the present invention is formed by a conventional technique having a common gate structure (Woong Choi, et. Al , Advanced Materials 24, 5382-5836 (2012)), the photoreactivity of about 100 to 1000 times higher than that of 100 mAW-1 is amplified.

As shown in FIGS. 8 to 10, the optical amplifying phototransistor of the present invention can amplify optical gain and photoreactivity through a structure in which a photoconductor and a phototransistor are combined by forming a local gate electrode.

11 illustrates the sensitivity of the optical amplification phototransistor according to the non-overlap length according to the embodiment of the present invention. Referring to FIG. 11, it can be seen that the sensitivity increases according to the non-overlap length and the photoreactivity. Therefore, the apparatus for measuring bio-information using the sensor array according to the embodiment of the present invention can provide a photoreactive sensor including a non-overlap region to amplify optical gain and photoreactivity.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

100: Biometric information measuring device using sensor array
120: sensor array
200: terminal

Claims

A light source for generating light;
And a photodetector coupled to the switching thin film transistor for amplifying photoreactivity of light generated from the light source unit and reflected or transmitted from the skin tissue, wherein the photoreactivity amplifies the tissue activity and function of the skin tissue, A sensor array formed on the substrate, the sensor array including a plurality of photoreactive sensors for outputting absorption information for mapping biometric information associated with the sensor; And
And an average value measuring unit for measuring an average value of the biometric information for the sensor array based on the absorption information output from the photoreactive sensor,
The photoreactive sensor amplifies the photoreactivity by amplifying the conductivity of the reflected or transmitted light through the non-overlap region between the channel region formed between the source electrode and the drain electrode in the at least one optical amplification phototransistor and the local gate electrode Amplifying
Biometric information measuring device using sensor array.

The method according to claim 1,
The photoreactive sensor
The at least one optical amplification phototransistor
Wherein the biometric information measuring device is a biometric information measuring device using a sensor array.

The method according to claim 1,
Wherein the optical amplification phototransistor includes the local gate electrode, the source electrode, and the drain electrode,
Wherein the channel region comprises the non-overlap region that is not overlapped with the local gate electrode
Biometric information measuring device using sensor array.

The method of claim 3,
Wherein the nonoverlap region is formed in both lateral directions of the source electrode and the drain electrode, or is formed in any one of the lateral direction of the source electrode and the drain electrode.

The method of claim 3,
The channel region
And a transition metal chalcogenide compound (Transition Metal Dichalcogenides).

The method according to claim 1,
The biometric information
Heart rate, oxygen saturation, and / or heart rate. The apparatus for measuring bio-information using a sensor array according to claim 1,

The method according to claim 1,
The sensor array
And is formed in a patch-like structure in connection with an IC circuit formed on the substrate.

The method according to claim 1,
The substrate
Wherein the biometric information measuring device is formed of at least one of paper, polymer, woven fabric, and metal foil.

The method according to claim 1,
A communication module for transmitting an average value of the measured biometric information to the outside; And
And an average value of the biometric information from the average value measuring unit based on absorption information measured from at least one photoreactive sensor selected from among the plurality of photoreactive sensors in response to a control command received from the communication module A control unit
Wherein the biometric information measuring device further comprises a sensor array.