MOBILE TERMINAL

A mobile terminal includes: a terminal body; a first sensor part formed on an external surface of the terminal body, having a light emitting portion and a light receiving portion, and configured to collect pulse wave information; a second sensor part disposed on one region of the terminal body, and configured to collect an additional bio signal; and a controller configured to calculate a blood pressure based on the pulse wave information and the additional bio signal.

CROSS-REFERENCE TO RELATED APPLICATION

Pursuant to 35 U.S.C. §119(a), this application claims the benefit of earlier filing date and right of priority to Korean Application No. 10-2015-0150484, filed on Oct. 28, 2015, the contents of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

The present invention relates to a mobile terminal capable of collecting user's bio information.

BACKGROUND ART

Various attempts have been made to implement complicated functions in such a multimedia device by means of hardware or software. Recently, research on various functions to collect bio information by a sensor, etc. included in a wearable-type mobile terminal mounted to a human body is ongoing actively. However, in case of mounting an additional sensing module for collecting bio information, the mobile terminal may have a large weight, and a user should contact part of his or her body onto the sensing module. This may cause user's inconvenience.

DISCLOSURE OF THE INVENTION

Therefore, an object of the present invention is to provide a mobile terminal capable of measuring a blood pressure.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a mobile terminal, including: a terminal body; a first sensor part formed on an external surface of the terminal body, having a light emitting portion and a light receiving portion, and configured to collect pulse wave information; a second sensor part disposed on one region of the terminal body, and configured to collect an additional bio signal; and a controller configured to calculate a blood pressure based on the pulse wave information and the additional bio signal.

In an embodiment of the present invention, the second sensor part may correspond to a pressure sensor for sensing an external force, and the additional bio signal may correspond to a pressure change sensed while the pulse wave information is collected by the first sensor part. Thus, the mobile terminal may measure a blood pressure based on a pulse wave change due to a pressure change.

In an embodiment of the present invention, the second sensor part may include first and second electrode portions disposed on different regions of the terminal body, and generating a potential difference. The controller may collect electrocardiogram information based on the potential difference. Thus, the mobile terminal may measure a pressure based on the electrocardiogram information and pulse wave information.

In an embodiment of the present invention, the mobile terminal may further include a band for fixing the terminal body to a user's wrist, and the second electrode portion may be disposed on one region of the band. The band may further include a flexible printed circuit board for electrically connecting the second electrode portion to the terminal body. In case of the watch-type mobile terminal, a sensor for collecting pulse wave information and electrocardiogram information is mounted to a region of the mobile terminal which contacts a human body when the user wears the mobile terminal. Accordingly, the watch-type mobile terminal can easily measure a blood pressure.

Effects of the Present Invention

In the mobile terminal according to an embodiment of the present invention, a signal input unit for inputting a control signal by a pressurization structure includes a PPG sensor and a pressure sensor. Thus, information for calculating a blood pressure may be obtained without an additional space for the PPG sensor and the pressure sensor. Further, since the PPG sensor and the pressure sensor are integrally formed with the signal input unit, bio information for calculating a blood pressure may be obtained while a specific function is being executed. Thus, an additional sensor module for measuring a blood pressure is not required.

Further, an electrode unit, part of an ECG module for collecting electrocardiogram information is disposed close to electronic components of the mobile terminal. Thus, an additional sensing module is not required, and the electrode unit is not covered by a case mounted to the terminal body. Further, in case of using the electronic components, bio information may be collected.

MODES FOR CARRYING OUT THE PREFERRED EMBODIMENTS

A terminal in the present description may include a mobile terminal such as a portable phone, a smart phone, a notebook computer, a digital broadcasting terminal, Personal Digital Assistants (PDA), Portable Multimedia Player (PMP), a navigation system, a slate PC, a tablet PC, an ultra book, a wearable device (e.g., smart watch), a glass-type terminal (e.g., smart glass), a head mounted display (HMD), etc.

However, it will be obvious to those skilled in the art that the present invention may be also applicable to a fixed terminal such as a digital TV, a desktop computer and a digital signage, except for specific configurations for mobility.

At least some of the above components may operate in a cooperating manner, so as to implement an operation or a control method of a glass type terminal according to various embodiments to be explained later. The operation or the control method of the glass type terminal may be implemented on the glass type terminal by driving at least one application program stored in the memory170.

Examples of such wireless Internet access include Wireless LAN (WLAN), Wireless Fidelity (Wi-Fi), Wi-Fi Direct, Digital Living Network Alliance (DLNA), Wireless Broadband (WiBro), Worldwide Interoperability for Microwave Access (WiMAX), High Speed Downlink Packet Access (HSDPA), Long Term Evolution (LTE), and the like. The wireless Internet module113may transmit/receive data according to one or more of such wireless Internet technologies, and other Internet technologies as well.

In some embodiments, when the wireless Internet access is implemented according to, for example, WiBro, HSDPA,HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A and the like, as part of a mobile communication network, the wireless Internet module113performs such wireless Internet access. As such, the Internet module113may cooperate with, or function as, the mobile communication module112.

The short-range communication module114is configured to facilitate short-range communications. Suitable technologies for implementing such short-range communications include BLUETOOTH™, Radio Frequency IDentification (RFID), Infrared Data Association (IrDA), Ultra-WideBand (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, Wireless USB(Wireless Universal Serial Bus), and the like. The short-range communication module114in general supports wireless communications between the mobile terminal100and a wireless communication system, communications between the mobile terminal100and another mobile terminal100, or communications between the mobile terminal and a network where another mobile terminal100(or an external server) is located, via wireless area networks. One example of the wireless area networks is a wireless personal area networks.

The user input unit123may recognize information sensed by the sensing unit140, as well as by the aforementioned mechanical input means and touch type input means, as information input from a user. Accordingly, the controller180can control an operation of the mobile terminal100corresponding to the sensed information.

The second camera121bis shown located at the rear side of the terminal body and includes an image capturing direction that is substantially opposite to the image capturing direction of the first camera unit121a.If desired, second camera121amay alternatively be located at other locations, or made to be moveable, in order to have a different image capturing direction from that which is shown.

The second camera121bcan include a plurality of lenses arranged along at least one line. The plurality of lenses may also be arranged in a matrix configuration. The cameras may be referred to as an “array camera.”

When the second camera121bis implemented as an array camera, images may be captured in various manners using the plurality of lenses and images with better qualities.

As shown inFIG. 1C, a flash124is shown adjacent to the second camera121b.When an image of a subject is captured with the camera121b, the flash124may illuminate the subject.

The mobile terminal of the present invention is configured to collect a bio-information of a user by contacting part of the user's body. The mobile terminal according to an embodiment of the present invention measures a blood pressure using at least one bio-information. Hereinafter, a detailed structure of the mobile terminal for measuring a blood pressure will be explained.

FIG. 2Ais a sectional view illustrating a structure of a sensing module capable of collecting bio-information.FIG. 2Bis a conceptual view illustrating a pressure sensor. Referring toFIGS. 1B and 2A, the sensing module310may be integrally formed with a signal input unit for generating a control command. The mobile terminal according to an embodiment of the present invention measures a blood pressure, based on information on a pulse wave sensed while an external force is being received. That is, the mobile terminal may calculate a blood pressure based on information on a sensed pressure and a sensed pulse wave.

For instance, the sensing module310may be formed on a front surface of the mobile terminal100, and may be configured as a button for generating a control signal when pressed. Although not shown, the sensing module310may include an actuator configured to generate a different voltage when pressed, etc.

The sensing module310includes a cover portion311, a lens portion312, a light emitting portion313, a light receiving portion314, and a pressure sensor315. The cover portion311forms the appearance of the sensing module310, and contacts part of a user's body. The cover portion311is configured to accommodate therein the lens portion312, the light emitting portion313, the light receiving portion314and the pressure sensor315, and is configured to be moved in a thickness direction of the mobile terminal100by an external force. The cover portion311may include an elastic member moved by an external force and restored to the original state.

The cover portion311may include an open region or a transmissive region formed to transmit light emitted from the light emitting portion313to a human body. The light emitting portion313may be configured as an IR light emitting diode (LED). The lens portion312is disposed on the light emitting portion313. The lens portion312is configured to reflect light such that the light emitted from the light emitting portion313is concentrated to one region of the cover portion311. The one region may be an open region or a transmissive region of the cover portion311. The lens portion312may be formed such that light emitted from the light emitting portion313and reflected from a human body disposed on the cover portion311may be transmitted to the light receiving portion314.

The light receiving portion314is configured to sense light of an IR LED reflected from a finger. The light receiving portion314may have an array structure. In this case, the light receiving portion314may sense a motion of the finger on the cover portion311, based on light reflected from the finger.

The pressure sensor315is disposed in the cover portion311so as to sense an external force applied to the cover portion311. The pressure sensor315may sense an external force applied from the outside, by supporting at least one of the cover portion311, the lens portion312, the light emitting portion313and the light receiving portion314.

Referring toFIG. 2B, the pressure sensor315may include a supporting portion315a,a sensing portion315b,and an elastic portion315cdisposed between the sensing portion315band the supporting portion315a. The pressure sensor315is formed to be transformable by an external force, and is configured to sense a pressure based on a voltage value changed due to its transformation.

The sensing module310may further include a leaf spring for supporting the cover portion311to which an external force is applied. And the pressure sensor315is disposed to face the leaf spring, and may include a pressurization structure pressed by an external force.

In the mobile terminal according to an embodiment of the present invention, a signal input unit for inputting a control signal by having a pressurization structure includes a PPG sensor and a pressure sensor. Thus, information for calculating a blood pressure may be obtained without an additional space for the PPG sensor and the pressure sensor. Further, since the PPG sensor and the pressure sensor are integrally formed with the signal input unit, bio information for calculating a blood pressure may be obtained while a specific function is being executed.

FIG. 3is a conceptual view illustrating a sensing module according to an embodiment of the present invention. The mobile terminal according to an embodiment of the present invention calculates a blood pressure using information on a pressure and a pulse wave.

Referring toFIG. 3, a sensing module320is configured to sense a pulse wave and a fingerprint, and the controller180measures a blood pressure using a sensed pulse wave and a sensed pressure. The sensing module320may include a plurality of light emitting portions321, a lens portion322, a cover portion323, a light receiving portion324and a matrix layer325. The light emitting portions321may be configured as light emitting diodes (LED).

Light emitted from the light emitting portions321and passing through the matrix layer325is reflected from a finger disposed close to the cover portion323, through the lens portion322.

The sensing module320according to an embodiment of the present invention may sense a motion of a finger by the plurality of light emitting portions321and the matrix layer325. The controller180may generate a control command based on the motion of the finger.

The controller180may sense a pulse wave based on light reflected from a finger which has contacted the sensing module320, using the plurality of light emitting portions321and the light receiving portion324. Although not shown, the sensing module320includes a pressure sensor. The pressure sensor may be the same pressure sensor shown inFIG. 2B. The controller180may measure a blood pressure based on a measured pulse wave and a measured pressure.

FIGS. 4A and 4Bare conceptual views illustrating a sensing module capable of sensing a fingerprint according to an embodiment of the present invention. The sensing module for sensing a fingerprint and a fingerprint change according to an embodiment of the present invention serves as an electrode unit of an ECG module for measuring an electrocardiogram.

Referring toFIGS. 4A and 4B, a sensing module330according to this embodiment includes a first region331and a second region332. The first region331is formed of an Rx electrode, and the second region332is formed of a Tx electrode. The first region331may be formed to have a predetermined width such that a user's hand may contact, and the second region332may be formed to enclose an edge part of the first region331. The first and second regions331,332are exposed to the outside of the mobile terminal100, and may have any shape.

The sensing module330may sense a fingerprint in an active capacitive manner by using the first and second regions331,332. An electric signal is transmitted from the second region332formed of a metallic material, and the transmitted electric signal is reflected by a curved shape of a fingerprint. The transmitted electric signal passes through a dead skin12of a finger, and is reflected from a live skin11to thus be incident onto the second region332. The first region331formed of a pixel array333disposed below the second region332senses a difference of capacitance of an electrical signal, thereby forming a fingerprint image. The sensing module330may further include a High Sensitive Pixel Amplifier (HSPA)334.

The second region332may be formed of a first electrode between a pair of electrodes which contact a human body in order to measure an electrocardiogram based on a potential difference. The controller180may measure an electrocardiogram based on a potential difference occurring when the pair of electrodes contact different regions of a human body, by using the second region332as a first electrode, and by using a metallic ember mounted to another region of the mobile terminal100as a second electrode.

The electrocardiogram (ECG) is a process of recording an electrical activity of the heart over a period of time using electrodes placed on a patient's body. These electrodes detect the tiny electrical changes on the skin that arise from the heart muscle depolarizing during each heartbeat. The ECG corresponds to information for diagnosing a motion of the heart.

That is, the mobile terminal according to this embodiment may calculate a blood pressure based on an electrocardiogram, and based on a pulse wave collected by a PPG sensor. In this case, the electrocardiogram is collected by a first electrode implemented as the second region332formed of a metallic material and included in the sensing module330having a fingerprint sensing function, and a second electrode disposed on another region of the mobile terminal.

As aforementioned, the mobile terminal includes an ECG sensor including electrodes which contact different regions of a human body in order to measure a blood pressure, and a PPG sensor including a light emitting portion and a light receiving portion so as to collect a pulse wave. Hereinafter, will be explained the sensing module disposed on one region of the mobile terminal.

FIG. 4Cis a view illustrating a pulse wave measured while a pressure is applied.

FIG. 4C(a) illustrates a pressure applied as time lapses. Referring toFIG. 4C(b), a pulse wave sensed by the PPG sensor is shown as a waveform indicating a voltage change by lapse of time.

The light emitting portions313and the light receiving portion314constitute the PPG sensor. The PPG sensor irradiates light of a specific wavelength to a human body, and measures a pulsation component resulting from a heartbeat based on reflected or transmitted light. Once light is irradiated to a human body from the light emitting portions310, the light is absorbed by blood, bones and tissues. Part of the absorbed light reaches the light receiving portion314. An absorbed degree of the light is proportional to an amount of the skin, tissues and blood, and is changed only when a blood flow is changed by a heartbeat. Thus, a change in an absorbed optical amount is proportional to a blood change. An amount of light received by the light receiving portion314is obtained by deducting an amount of light absorbed by a finger, from a total amount of light which has penetrated the light receiving portion314. Thus, a change of an optical amount of transmitted light also indicates a change of a blood flow. Accordingly, it is possible to detect a change of a blood amount by a heartbeat, by measuring an amount of light received by the light receiving portion314.

The controller180estimates blood pressures of a region to be tested, based on differences between time points corresponding to peaks of a sensed pulse wave, and time points corresponding to peaks of a filtered pulse wave. Among the estimated blood pressures, a maximum blood pressure may be defined as a systolic BP, and a minimum blood pressure may be defined as diastolic BP. Other blood pressures such as a mean BP may be estimated based on the estimated blood pressures.

FIGS. 5A to 5Care conceptual views illustrating a sensing module according to another embodiment of the present invention.

The sensing module according to this embodiment includes a PPG sensor for collecting pulse wave information by measuring a distance of a subject, and includes part of an ECG module for measuring an electrocardiogram, the part formed as an additional metallic member. Thus, the mobile terminal may calculate a blood pressure based on pulse wave information and electrocardiogram information.

Referring toFIGS. 5A and 5B, the mobile terminal according to this embodiment of the present invention measures a blood pressure based on a pulse wave and an electrocardiogram obtained by a sensing module340and an additional electrode. One region of the sensing module340is formed to be exposed to a rear surface of the mobile terminal100.

Preferably, the sensing module340is disposed close to the rear camera121b.The sensing module340includes a plurality of light emitting portions341, a light receiving portion342, and an electrode unit343. The flash124may be disposed close to the sensing module340.

While the rear camera121bis being activated, the emitting portions341and the light receiving portion342of the sensing module340may measure a distance between the mobile terminal100and a specific object. The controller180may execute an auto focusing for controlling a focal point of a subject obtained by the rear camera121b,using the distance measuring function of the light emitting portions341and the light receiving portion342.

For instance, the light emitting portions341may emit laser. Based on a difference between time when the laser has been emitted and time when the emitted laser is received by the light receiving portion342after being reflected from an arbitrary subject, a distance between the mobile terminal100and the subject may be measured. However, a type of light emitted from the light emitting portions341is not limited to laser.

The controller180may measure a pulse wave by the light emitting portions341and the light receiving portion342. In a case where part of a user's body (e.g., finger) is close to the sensing module340, if light emitted from the light emitting portions341and reflected from the user's body reaches the light receiving portion342, the controller may measure a pulse wave using a pattern of light incident onto the light receiving portion342.

Referring toFIG. 5C, the electrode unit343may be formed to enclose the light emitting portions341and the light receiving portion342. The electrode unit343is mounted to be exposed to the outside of the mobile terminal100. The sensing module340may further include a chip345electrically connected to the light emitting portions341and the light receiving portion342, and a window344for covering the chip345. The electrode unit343may be arranged to constitute an external surface of the mobile terminal, together with the window344. And the electrode unit343may be formed on the same surface as the window344.

The sensing module340is electrically connected to a main printed circuit board181′ through a flexible printed circuit board181a.The electrode unit343is connected to the flexible printed circuit board181athrough a connection portion181b.

Preferably, the electrode unit343is disposed close to the light emitting portions341and the light receiving portion342. With such a configuration, if a finger contacts the electrode potion343, light emitted from the light emitting portions341is reflected from the finger to reach the light receiving portion342.

If it is determined based on a pattern of light incident onto the light receiving portion342that a user's body has contacted the electrode unit343, the controller180controls the electrode unit343to apply a current, and collects information on a blood pressure and a pulse wave.

In this embodiment, an additional electrode unit which contacts part of a user's body may be disposed on one region of the mobile terminal such that a potential difference between the additional electrode unit and the electrode unit343may occur. For instance, the additional electrode unit may be formed at a metallic member which forms an edge of a signal input module disposed on a front surface of the mobile terminal, or a metallic member which encloses the audio output module152.

If a potential difference occurs as a user's body contact a pair of electrode portions, the controller180may control the sensing module340to collect information on a pulse wave by the light emitting portions341and the light receiving portion342.

The sensing module340may be used to execute an auto focusing or to measure a pulse wave of a human body. The controller180may selectively execute a function based on a specific control command applied by a user, or may activate a function to collect user's bio information when information of a specific pattern is collected by the electrode unit or the light receiving portion. Since an additional configuration for collecting bio information is not required, the mobile terminal may have a simplified structure.

The sensing module340may not include the electrode unit343. That is, the sensing module340may be formed only to collect information on a pulse wave of a human body, without including the electrode unit343which constitutes an ECG module. In this case, a plurality of electrode portions which constitutes the ECG module may be formed on another region of the mobile terminal100.

FIG. 6is a conceptual view illustrating a sensing module350according to still another embodiment of the present invention. The sensing module350according to this embodiment includes a plurality of sensors for sensing different objects. The sensing module350is provided with a housing having an inner space, and the plurality of sensors are mounted to the housing.

The sensing module350includes a PPG module351for measuring a pulse wave, and an electrode unit352for measuring an electrocardiogram. Although not shown, the PPG module351includes a light emitting portion and a light receiving portion. The sensing module350may further include an oxygen saturation sensor, a body temperature sensor, etc.

The sensing module350may be disposed on a rear surface of the mobile terminal. However, the present invention is not limited to this. Preferably, the PPG module351and the electrode unit352are disposed to be exposed to the outside. The electrode unit352constitutes an ECC module for measuring a potential difference of a current applied to a human body, together an additional electrode unit disposed on another region of the mobile terminal.

FIGS. 7A and 7Bare conceptual views illustrating an ECG module according to an embodiment of the present invention, andFIGS. 7C and 7Dare conceptual views illustrating an electrode unit disposed close to an audio output module152a.

The ECG module is composed of a pair of electrode portions which contact different regions of a human body. Alternatively, the mobile terminal100may include one electrode unit, and an external device wirelessly connected to the mobile terminal100may include another electrode unit.

Referring toFIGS. 7A and 7B, a first electrode unit361awhich constitutes the ECG module according to this embodiment is disposed close to the audio output unit module152a,and a second electrode unit361bis disposed close to the sensing module140. The sensing module140includes a light emitting portion for emitting laser, and a light receiving portion for collecting laser reflected from an arbitrary subject. The controller180may focalize the rear camera121b,using incident light.

The sensing module140and the second electrode unit361bare the same as the sensing module340shown inFIGS. 5A to 5C. The second electrode unit361bmay be implemented as a metallic member which encloses the sensing module140, and is exposed to the outside of the mobile terminal. The controller180may collect information on a pulse wave based on light reflected from a human body close to the sensing module140, by the light emitting portion and the light receiving portion of the sensing module140. That is, the sensing module140may serve as a PPG sensor.

Referring toFIGS. 7C and 7D, the first electrode unit361amay serve as a cover for covering a speaker module which implements the audio output unit152a.That is, the first electrode unit361ais exposed to the outside with covering the speaker module. The first electrode unit361amay be formed of metal mesh such that a sound (vibrations) generated from the speaker module may be transmitted to the outside.

A metallic extended portion361a′ may be formed on a contact terminal181a,and the first electrode unit361aexposed to the outside may be disposed on the metallic extended portion361a′. The contact terminal181ais electrically connected to a printed circuit board181b.

In this embodiment, if an ear of a user contacts the first electrode unit361aand a hand of the user contacts the second electrode unit361b,the controller180may measure an electrocardiogram based on a potential difference between the first and second electrode portions361a,361b.The controller180may measure a pulse wave using light (laser) reflected from the user's hand contacting the sensing module140. The controller180may calculate a blood pressure based on the electrocardiogram and the pulse wave.

FIGS. 8A and 8Bare conceptual views illustrating an electrode unit according to another embodiment of the present invention.

FIG. 8Aillustrates the mobile terminal where a case100′ is mounted to the terminal body. The case100′ includes an open region through which part of the terminal body is exposed to the outside. The open region is formed to correspond to a component of the mobile terminal exposed to the outside (e.g., the signal input unit, the camera, the sensing module, etc.) when the case100′ is mounted to the terminal body.

The sensing module140, the rear camera121band the rear key123cof the mobile terminal100are exposed to the outside based on the open region. One of the pair of electrode portions which constitute the ECG module is disposed on one region of the terminal body which is exposed to the outside through the open region. For instance, an electrode unit362according to this embodiment may be formed along an edge of the rear camera121b.The electrode unit362may be formed of a metallic member, metal deco to implement a sophisticated sense of the rear camera121b.

Alternatively, the electrode unit362may be formed as a metallic member disposed close to the rear key123c.In this case, while a user applies a control command using the rear key123c,the controller180may collect bio information.

In this embodiment, even when a case for covering part of an external surface of the terminal body is mounted to the mobile terminal, the electrode unit may contact a user's body because it is exposed to the outside.

Referring toFIG. 8B, the electrode unit may be part of the terminal body. In a case where one region of the terminal body is formed of a metallic material, the one region may serve as an electrode unit363. The electrode unit363may be formed to constitute a side surface of the terminal body. In this case, an electrocardiogram may be measured in a state where a user holds the mobile terminal, without a step of inputting an additional control command or touching a specific region by the user.

FIG. 9Ais a conceptual view illustrating a control method of measuring a blood pressure, andFIG. 9Bis a conceptual view illustrating a method of measuring a blood pressure based on information on an electrocardiogram (ECG) and a pulse wave.

The mobile terminal according to this embodiment measures a blood pressure in a cuff-less manner using information on an electrocardiogram (ECG) and a pulse wave.

FIG. 9A(a) illustrates a front surface of the mobile terminal100including a first electrode unit344, andFIG. 10A(b) illustrates a rear surface of the mobile terminal100including a sensing module340having a second electrode unit343. The sensing module340is the same as the sensing module shown inFIG. 5A, and thus explanations about the sensing module340having the second electrode unit343will be replaced by those conducted with reference toFIGS. 5A to 5C. The first and second electrode portions344,343constitute an ECG module for collecting electrocardiogram information.

Once the first and second electrode portions344,343contact different parts of a user's body, the controller180measures an electrocardiogram based on a potential difference. Referring toFIG. 9B, the controller180calculates a blood pressure, based on a pulse wave pattern (P1) collected by a PPG sensor implemented as the sensing module340, and based on an electrocardiogram pattern (P2) collected by an ECG module composed of the first and second electrode portions344,343. A pulse transit time (PPT) may be measured by using a time difference between a peak of the pulse wave pattern (P1) and a peak of the electrocardiogram pattern (P2). The controller180may calculate a blood pressure through a correlation between the PPT and a diastolic blood pressure.

The controller180may display the calculated blood pressure and related result information510, on the display unit151of the mobile terminal100.

A position of the first and second electrode portions344,343according to this embodiment is not limited to the position shown in the drawings. The first and second electrode portions344,343may be disposed on different regions of the mobile terminal which contact different parts of a human body.

FIG. 10Ais a block diagram illustrating a mobile terminal according to another embodiment of the present invention.FIG. 10Bis a conceptual view illustrating an example of a mobile terminal according to the present invention, which is viewed from one direction. The mobile terminal according to this embodiment corresponds to a watch-type mobile terminal wearable on a user's wrist.

The watch-type mobile terminal600is shown having components such as a wireless communication unit610, an input unit620, a sensing unit640, an output unit650, an interface unit660, a memory670, a controller680, and a power supply unit690. It is understood that implementing all of the illustrated components ofFIG. 10Ais not a requirement, and that greater or fewer components may alternatively be implemented.

Referring now toFIG. 10A, the watch-type mobile terminal600is shown having wireless communication unit610configured with several commonly implemented components. For instance, the wireless communication unit610typically includes one or more components which permit wireless communication between the watch-type mobile terminal600and a wireless communication system or network within which the mobile terminal is located.

The wireless communication unit610typically includes one or more modules which permit communications such as wireless communications between the watch-type mobile terminal600and a wireless communication system, communications between the watch-type mobile terminal600and another mobile terminal, communications between the watch-type mobile terminal600and an external server. Further, the wireless communication unit610typically includes one or more modules which connect the watch-type mobile terminal600to one or more networks. To facilitate such communications, the wireless communication unit610includes one or more of a broadcast receiving module611, a mobile communication module612, a wireless Internet module613, a short-range communication module614, and a location information module615.

The input unit620includes a camera621for obtaining images or video, a microphone622, which is one type of audio input device for inputting an audio signal, and a user input unit623(for example, a touch key, a push key, a mechanical key, a soft key, and the like) for allowing a user to input information. Data (for example, audio, video, image, and the like) is obtained by the input unit620and may be analyzed and processed by controller680according to device parameters, user commands, and combinations thereof.

The sensing unit640is typically implemented using one or more sensors configured to sense internal information of the mobile terminal, the surrounding environment of the mobile terminal, user information, and the like. For example, inFIG. 10A, the sensing unit640is shown having a proximity sensor641and an illumination sensor642. If desired, the sensing unit640may alternatively or additionally include other types of sensors or devices, such as a touch sensor, an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared (IR) sensor, a finger scan sensor, a ultrasonic sensor, an optical sensor (for example, camera621), a microphone622, a battery gauge, an environment sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, a thermal sensor, and a gas sensor, among others), and a chemical sensor (for example, an electronic nose, a health care sensor, a biometric sensor, and the like), to name a few. The watch-type mobile terminal600may be configured to utilize information obtained from sensing unit640, and in particular, information obtained from one or more sensors of the sensing unit640, and combinations thereof.

The output unit650is typically configured to output various types of information, such as audio, video, tactile output, and the like. The output unit650is shown having a display unit651, an audio output module652, a haptic module653, and an optical output module654.

The display unit651may have an inter-layered structure or an integrated structure with a touch sensor in order to facilitate a touch screen. The touch screen may provide an output interface between the watch-type mobile terminal600and a user, as well as function as the user input unit623which provides an input interface between the watch-type mobile terminal600and the user.

The interface unit660serves as an interface with various types of external devices that can be coupled to the watch-type mobile terminal600. The interface unit660, for example, may include any of wired or wireless ports, external power supply ports, wired or wireless data ports, memory card ports, ports for connecting a device having an identification module, audio input/output (I/O) ports, video I/O ports, earphone ports, and the like. In some cases, the watch-type mobile terminal600may perform assorted control functions associated with a connected external device, in response to the external device being connected to the interface unit660.

The memory670is typically implemented to store data to support various functions or features of the watch-type mobile terminal600. For instance, the memory670may be configured to store application programs executed in the watch-type mobile terminal600, data or instructions for operations of the watch-type mobile terminal600, and the like. Some of these application programs may be downloaded from an external server via wireless communication. Other application programs may be installed within the watch-type mobile terminal600at time of manufacturing or shipping, which is typically the case for basic functions of the watch-type mobile terminal600(for example, receiving a call, placing a call, receiving a message, sending a message, and the like). It is common for application programs to be stored in the memory670, installed in the watch-type mobile terminal600, and executed by the controller680to perform an operation (or function) for the watch-type mobile terminal600.

The controller680typically functions to control overall operation of the watch-type mobile terminal600, in addition to the operations associated with the application programs. The controller680may provide or process information or functions appropriate for a user by processing signals, data, information and the like, which are input or output by the various components depicted inFIG. 10A, or activating application programs stored in the memory670. As one example, the controller680controls some or all of the components illustrated inFIGS. 10A and 10Baccording to the execution of an application program that have been stored in the memory670.

The power supply unit690can be configured to receive external power or provide internal power in order to supply appropriate power required for operating elements and components included in the watch-type mobile terminal600. The power supply unit690may include a battery, and the battery may be configured to be embedded in the terminal body, or configured to be detachable from the terminal body.

At least some of the above components may operate in a cooperating manner, so as to implement an operation or a control method of a glass type terminal according to various embodiments to be explained later. The operation or the control method of the glass type terminal may be implemented on the glass type terminal by driving at least one application program stored in the memory670.

Referring still toFIG. 10A, various components depicted in this figure will now be described in more detail. Regarding the wireless communication unit610, the broadcast receiving module611is typically configured to receive a broadcast signal and/or broadcast associated information from an external broadcast managing entity via a broadcast channel. The broadcast channel may include a satellite channel, a terrestrial channel, or both. In some embodiments, two or more broadcast receiving modules611may be utilized to facilitate simultaneously receiving of two or more broadcast channels, or to support switching among broadcast channels.

Examples of wireless signals transmitted and/or received via the mobile communication module612include audio call signals, video (telephony) call signals, or various formats of data to support communication of text and multimedia messages.

The wireless Internet module613is configured to facilitate wireless Internet access. This module may be internally or externally coupled to the watch-type mobile terminal600. The wireless Internet module613may transmit and/or receive wireless signals via communication networks according to wireless Internet technologies.

Examples of such wireless Internet access include Wireless LAN (WLAN), Wireless Fidelity (Wi-Fi), Wi-Fi Direct, Digital Living Network Alliance (DLNA), Wireless Broadband (WiBro), Worldwide Interoperability for Microwave Access (WiMAX), High Speed Downlink Packet Access (HSDPA), Long Term Evolution (LTE), and the like. The wireless Internet module613may transmit/receive data according to one or more of such wireless Internet technologies, and other Internet technologies as well.

In some embodiments, when the wireless Internet access is implemented according to, for example, WiBro, HSDPA,HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A and the like, as part of a mobile communication network, the wireless Internet module613performs such wireless Internet access. As such, the Internet module613may cooperate with, or function as, the mobile communication module612.

The short-range communication module614is configured to facilitate short-range communications. Suitable technologies for implementing such short-range communications include BLUETOOTH™, Radio Frequency IDentification (RFID), Infrared Data Association (IrDA), Ultra-WideBand (UWB), ZigBee, Near Field Communication (NFC), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, Wireless USB(Wireless Universal Serial Bus), and the like. The short-range communication module614in general supports wireless communications between the watch-type mobile terminal600and a wireless communication system, communications between the watch-type mobile terminal600and another watch-type mobile terminal600, or communications between the mobile terminal and a network where another watch-type mobile terminal600(or an external server) is located, via wireless area networks. One example of the wireless area networks is a wireless personal area networks.

In some embodiments, another mobile terminal (which may be configured similarly to watch-type mobile terminal600) may be a wearable device, for example, a smart watch, a smart glass or a head mounted display (HMD), which is able to exchange data with the watch-type mobile terminal600(or otherwise cooperate with the watch-type mobile terminal600). The short-range communication module614may sense or recognize the wearable device, and permit communication between the wearable device and the watch-type mobile terminal600. In addition, when the sensed wearable device is a device which is authenticated to communicate with the watch-type mobile terminal600, the controller680, for example, may cause transmission of data processed in the watch-type mobile terminal600to the wearable device via the short-range communication module614. Hence, a user of the wearable device may use the data processed in the watch-type mobile terminal600on the wearable device. For example, when a call is received in the watch-type mobile terminal600, the user may answer the call using the wearable device. Also, when a message is received in the watch-type mobile terminal600, the user can check the received message using the wearable device.

The location information module615is generally configured to detect, calculate, derive or otherwise identify a position of the mobile terminal. As an example, the location information module615includes a Global Position System (GPS) module, a Wi-Fi module, or both. If desired, the location information module615may alternatively or additionally function with any of the other modules of the wireless communication unit610to obtain data related to the position of the mobile terminal.

The input unit620may be configured to permit various types of input to the mobile terminal620. Examples of such input include audio, image, video, data, and user input. Image and video input is often obtained using one or more cameras621. Such cameras621may process image frames of still pictures or video obtained by image sensors in a video or image capture mode. The processed image frames can be displayed on the display unit651or stored in memory670. In some cases, the cameras621may be arranged in a matrix configuration to permit a plurality of images having various angles or focal points to be input to the watch-type mobile terminal600. As another example, the cameras621may be located in a stereoscopic arrangement to acquire left and right images for implementing a stereoscopic image.

The microphone622is generally implemented to permit audio input to the watch-type mobile terminal600. The audio input can be processed in various manners according to a function being executed in the watch-type mobile terminal600. If desired, the microphone622may include assorted noise removing algorithms to remove unwanted noise generated in the course of receiving the external audio.

The user input unit623is a component that permits input by a user. Such user input may enable the controller680to control operation of the watch-type mobile terminal600. The user input unit623may include one or more of a mechanical input element (for example, a key, a button located on a front and/or rear surface or a side surface of the watch-type mobile terminal600, a dome switch, a jog wheel, a jog switch, and the like), or a touch-sensitive input, among others. As one example, the touch-sensitive input may be a virtual key or a soft key, which is displayed on a touch screen through software processing, or a touch key which is located on the mobile terminal at a location that is other than the touch screen. On the other hand, the virtual key or the visual key may be displayed on the touch screen in various shapes, for example, graphic, text, icon, video, or a combination thereof.

The user input unit623may recognize information sensed by the sensing unit640, as well as by the aforementioned mechanical input means and touch type input means, as information input from a user. Accordingly, the controller680can control an operation of the watch-type mobile terminal600corresponding to the sensed information.

The sensing unit640is generally configured to sense one or more of internal information of the mobile terminal, surrounding environment information of the mobile terminal, user information, or the like. The controller680generally cooperates with the sending unit640to control operation of the watch-type mobile terminal600or execute data processing, a function or an operation associated with an application program installed in the mobile terminal based on the sensing provided by the sensing unit640. The sensing unit640may be implemented using any of a variety of sensors, some of which will now be described in more detail.

In general, controller680processes data corresponding to proximity touches and proximity touch patterns sensed by the proximity sensor641, and cause output of visual information on the touch screen. In addition, the controller680can control the watch-type mobile terminal600to execute different operations or process different data according to whether a touch with respect to a point on the touch screen is either a proximity touch or a contact touch.

A touch sensor can sense a touch applied to the touch screen, such as display unit651, using any of a variety of touch methods. Examples of such touch methods include a resistive type, a capacitive type, an infrared type, and a magnetic field type, among others.

When a touch input is sensed by a touch sensor, corresponding signals may be transmitted to a touch controller. The touch controller may process the received signals, and then transmit corresponding data to the controller680. Accordingly, the controller680may sense which region on the display unit651has been touched. Here, the touch controller may be a component separate from the controller680, the controller680, and combinations thereof.

In some embodiments, the controller680may execute the same or different controls according to a type of touch object that touches the touch screen or a touch key provided in addition to the touch screen. Whether to execute the same or different control according to the object which provides a touch input may be decided based on a current operating state of the watch-type mobile terminal600or a currently executed application program, for example.

The display unit651is generally configured to output information processed in the watch-type mobile terminal600. For example, the display unit651may display execution screen information of an application program executing at the watch-type mobile terminal600or user interface (UI) and graphic user interface (GUI) information in response to the execution screen information.

In some embodiments, the display unit651may be implemented as a stereoscopic display unit for displaying stereoscopic images. A typical stereoscopic display unit may employ a stereoscopic display scheme such as a stereoscopic scheme (a glass scheme), an auto-stereoscopic scheme (glassless scheme), a projection scheme (holographic scheme), or the like.

The audio output module652is generally configured to output audio data. Such audio data may be obtained from any of a number of different sources, such that the audio data may be received from the wireless communication unit610or may have been stored in the memory670. The audio data may be output during modes such as a signal reception mode, a call mode, a record mode, a voice recognition mode, a broadcast reception mode, and the like. The audio output module652can provide audible output related to a particular function (e.g., a call signal reception sound, a message reception sound, etc.) performed by the watch-type mobile terminal600. The audio output module652may also be implemented as a receiver, a speaker, a buzzer, or the like.

A haptic module653can be configured to generate various tactile effects that a user feels, perceive, or otherwise experience. A typical example of a tactile effect generated by the haptic module653is vibration. The strength, pattern and the like of the vibration generated by the haptic module653can be controlled by user selection or setting by the controller. For example, the haptic module653may output different vibrations in a combining manner or a sequential manner.

The haptic module653can also be implemented to allow the user to feel a tactile effect through a muscle sensation such as the user's fingers or arm, as well as transferring the tactile effect through direct contact. Two or more haptic modules653may be provided according to the particular configuration of the watch-type mobile terminal600.

An optical output module654can output a signal for indicating an event generation using light of a light source. Examples of events generated in the watch-type mobile terminal600may include message reception, call signal reception, a missed call, an alarm, a schedule notice, an email reception, information reception through an application, and the like.

The interface unit660serves as an interface for external devices to be connected with the watch-type mobile terminal600. For example, the interface unit660can receive data transmitted from an external device, receive power to transfer to elements and components within the watch-type mobile terminal600, or transmit internal data of the watch-type mobile terminal600to such external device. The interface unit660may include wired or wireless headset ports, external power supply ports, wired or wireless data ports, memory card ports, ports for connecting a device having an identification module, audio input/output (I/O) ports, video I/O ports, earphone ports, or the like.

The memory670can store programs to support operations of the controller680and store input/output data (for example, phonebook, messages, still images, videos, etc.). The memory670may store data related to various patterns of vibrations and audio which are output in response to touch inputs on the touch screen.

The controller680may typically control the general operations of the watch-type mobile terminal600. For example, the controller680may set or release a lock state for restricting a user from inputting a control command with respect to applications when a status of the mobile terminal meets a preset condition.

The power supply unit690receives external power or provide internal power and supply the appropriate power required for operating respective elements and components included in the watch-type mobile terminal600. The power supply unit690may include a battery, which is typically rechargeable or be detachably coupled to the terminal body for charging.

The power supply unit690may include a connection port. The connection port may be configured as one example of the interface unit660to which an external charger for supplying power to recharge the battery is electrically connected.

As another example, the power supply unit690may be configured to recharge the battery in a wireless manner without use of the connection port. In this example, the power supply unit690can receive power, transferred from an external wireless power transmitter, using at least one of an inductive coupling method which is based on magnetic induction or a magnetic resonance coupling method which is based on electromagnetic resonance.

As illustrated inFIG. 10B, the watch-type mobile terminal600includes a main body601with a display unit651and a band604connected to the main body401to be wearable on a wrist.

The main body601may include a case having a certain appearance. As illustrated, the case may include a first case601a and a second case601bcooperatively defining an inner space for accommodating various electronic components. Other configurations are possible. For instance, a single case may alternatively be implemented, with such a case being configured to define the inner space, thereby implementing a mobile terminal600with a uni-body.

The watch-type mobile terminal600can perform wireless communication, and an antenna for the wireless communication can be installed in the main body601. The antenna may extend its function using the case. For example, a case including a conductive material may be electrically connected to the antenna to extend a ground area or a radiation area.

The display unit651is shown located at the front side of the main body601so that displayed information is viewable to a user. In some embodiments, the display unit651includes a touch sensor so that the display unit can function as a touch screen. As illustrated, window651ais positioned on the first case601ato form a front surface of the terminal body together with the first case601a.

The illustrated embodiment includes audio output module652, a camera621, a microphone622, and a user input unit623positioned on the main body601. When the display unit651is implemented as a touch screen, additional function keys may be minimized or eliminated. For example, when the touch screen is implemented, the user input unit623may be omitted.

The band604is commonly worn on the user's wrist and may be made of a flexible material for facilitating wearing of the device. As one example, the band604may be made of fur, rubber, silicon, synthetic resin, or the like. The band604may also be configured to be detachable from the main body601. Accordingly, the band604may be replaceable with various types of bands according to a user's preference.

In one configuration, the band604may be used for extending the performance of the antenna. For example, the band may include therein a ground extending portion (not shown) electrically connected to the antenna to extend a ground area.

The band604may include fastener603. The fastener603may be implemented into a buckle type, a snap-fit hook structure, a Velcro® type, or the like, and include a flexible section or material. The drawing illustrates an example that the fastener603is implemented using a buckle.

FIG. 11Ais a conceptual view illustrating a sensing module for measuring a blood pressure according to an embodiment of the present invention.FIG. 11Bis a conceptual view illustrating components of the sensing module.FIG. 11Cis a conceptual view illustrating a control method of outputting guide information while a blood pressure is being measured.

The mobile terminal according to this embodiment collects pressure information and pulse wave information by a sensing module710, and measures a blood pressure based on a periodic open/close state of an artery blood vessel occurring when cuff pressurization and cuff release are executed.

Referring toFIG. 11A, the sensing module710according to this embodiment may be disposed such that one region thereof may be exposed to the outside by the second case601b.The sensing module710includes a light emitting portion711, a light receiving portion712, a pressure sensor713, an elastic supporting portion714and a window715.

The light emitting portions711and the light receiving portion712are covered by the window715. The light emitting portions711may be implemented as green light emitting diodes (LEDs) for emitting green light, but is not limited to this. When a user wears the watch-type mobile terminal600on his or her wrist, the window715faces the user's wrist. If light emitted from the light emitting portions711is reflected from the user's body, the light receiving portion712senses the reflected light.

The controller may determine whether the watch-type mobile terminal600has been worn or not, based on light sensed by the light receiving portion712, and may execute a specific function.

The controller may collect pulse wave information based on a pattern of light sensed by the light receiving portion712. That is, the light emitting portions711and the light receiving portion712are implemented as a PPG sensor for measuring a pulse wave.

The pressure sensor713senses an external force applied from the outside of the mobile terminal. If an external force is applied to the first case601aor the display unit651in a state where the watch-type mobile terminal600has been worn on the wrist, a space between the first and second cases601a,601bbecomes narrow, and the pressure sensor713senses the external force. Once the external force is applied, the light emitting portions711and the light receiving portion712come in contact with the user's body more. As a result, an incident amount of light reflected from the user's skin is changed.

The elastic supporting portion714may be implemented as a leaf spring, but is not limited to this. The elastic supporting portion714provides an elastic restoration force when the external force is released.

The display unit651outputs guide information701for guiding a pressure to be applied or released while a pulse wave is being collected. The guide information may be implemented as an image and/or a text instructing a user to apply and release a pressure at specific time intervals.

FIGS. 12A to 12Dare conceptual views illustrating a mobile terminal including an electrode unit721for measuring an electrocardiogram (ECG).

The mobile terminal according to this embodiment may measure a blood pressure based on information on a measured pulse wave and information on a measured electrocardiogram. Hereinafter, will be explained the electrode unit disposed on a specific region of the mobile terminal according to various embodiments of the present invention. The mobile terminal according to various embodiments of the present invention includes a PPG sensor composed of light emitting portions and a light receiving portion so as to measure a pulse wave.

Referring toFIG. 12A, the electrode unit721is formed at the second case601b.The electrode unit721may be disposed close to a PPG sensor710′ composed of a light emitting portion and a light receiving portion. The electrode unit721is disposed at the second case601b exposed to the outside, and is made to contact a user's skin when the watch-type mobile terminal600is worn on the user's wrist.

Referring toFIG. 12B, an electrode unit722according to this embodiment is formed on one surface of the band604. For instance, the electrode unit722may be formed on one surface of the terminal body contacting a user's skin when the watch-type mobile terminal600is worn. However, the present invention is not limited to this.

The electrode unit722is disposed to be exposed to an external surface of the band604, and the band604includes a flexible printed circuit board (FPCB)681′ for electrically connecting the electrode unit722with the body601. The FPCB681′ is disposed in the band604.

Referring toFIG. 12C, an electrode unit723according to this embodiment is formed to enclose at least one region of an edge of the display unit651. That is, the electrode unit723is mounted to the first case601a.In this embodiment, a user may contact his or her body (hand) to the electrode unit723more easily, in a worn state of the mobile terminal.

Referring toFIG. 12D, an electrode unit724according to this embodiment is formed at a rotatable manipulator601cfor inputting a control command corresponding to a specific function. The rotatable manipulator601cmay be withdrawn to the outside in a connected state to the terminal body, or may be inserted into the terminal body. And the rotatable manipulator601cmay be rotated to two directions. The watch-type mobile terminal600may include a plurality of rotatable manipulator.

The mobile terminal according to this embodiment may measure an electrocardiogram when a user's hand contacts the rotatable manipulator601cin order to execute a specific function.

One electrode unit according to one embodiment may be applied to the mobile terminal together with another electrode unit according to another embodiment. For instance, the electrode units shown inFIGS. 12A and 12Dmay be included in a single mobile terminal.

FIG. 13is a conceptual view illustrating a control method of providing a result on a blood pressure measured according to an embodiment of the present invention.

Referring toFIGS. 12A, 12C and 13, a watch-type mobile terminal600according to this embodiment includes a PPG sensor, a first electrode unit mounted to the second case601b,and a second electrode unit mounted to the first case601a.

A controller680collects electrocardiogram information when a finger contacts the second electrode unit, in a state where the watch-type mobile terminal600has been worn on a user's wrist. Once the electrocardiogram information and pulse wave information by the PPG sensor are collected, the controller calculates a blood pressure. The controller680may transmit information on the calculated blood pressure, to an external device600′ wirelessly connected to the mobile terminal. Alternatively, the controller680may transmit the collected electrocardiogram information and pulse wave information, to the external device600′.

Once the blood pressure information is received, the external device600′ may output a result screen801including the blood pressure information to the display unit.

INDUSTRIAL APPLICABILITY

Various embodiments of the present invention provide a mobile terminal capable of measuring a blood pressure based on bio information, and the mobile terminal may be applied to various industrial fields.