Display device for biological feature detection

Abstract

A display device for biometric detection is provided. The display device includes: a display panel including display pixels and light sensing pixels arranged in a display area of the display panel; a display scan driver configured to drive the display pixels to emit light; a light sensing scan driver configured to drive the light sensing pixels to sense light; and a main driving circuit. The main driving circuit is configured to obtain a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal and a second pulse wave signal by using the biological characteristic information detection device; generating a first reference correction value and a second reference correction value based on the first reference pulse wave signal and the second reference pulse wave signal, respectively; and generating biometric information based on the first pulse wave signal, the second pulse wave signal, the first reference correction value, and the second reference correction value.

Description

Technical Field

[0001] The present disclosure relates to a display device, and more particularly, to a display device capable of accurately detecting and generating biometric information based on a plurality of pulse wave signals. Background Art

[0002] With the rise of the information society, the demand for display devices for displaying images in various ways has increased. These display devices can be integrated into various electronic devices such as smartphones, digital cameras, laptops, tablet PCs, navigation systems, and smart TVs. In some cases, portable display devices such as smartphones and tablet PCs provide various functions such as image capture, fingerprint recognition, and facial recognition.

[0003] With the recent interest in the healthcare industry, methods have been developed to more easily obtain health-related biometric information. In some cases, for example, some methods use portable blood pressure measurement devices instead of traditional oscillometric blood pressure measurement devices. However, portable blood pressure measurement devices require a separate light source, sensor, and display. Consequently, traditional methods require carrying a portable blood pressure measurement device in addition to a smartphone or tablet PC, which is inconvenient.

[0004] In some cases, efforts have been made to combine portable display devices such as smartphones or tablet PCs with portable blood pressure measurement devices. However, methods for measuring various biometric information (such as heart rate, heart rate variability, respiration, cardiovascular disease, oxygen saturation, etc.) require separate portable devices capable of measuring such biometric information. Summary of the Invention

[0005] A display device includes: a display panel including display pixels and light-sensing pixels arranged in a display area of ​​the display panel; a display scan driver configured to drive the display pixels to emit light; a light-sensing scan driver configured to drive the light-sensing pixels to sense light; and a main drive circuit. In one aspect, the main drive circuit is configured to perform operations including: obtaining a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal, and a second pulse wave signal using a biometric information detection device; generating a first reference correction value and a second reference correction value based on the first reference pulse wave signal and the second reference pulse wave signal, respectively; and generating biometric information based on the first pulse wave signal, the second pulse wave signal, the first reference correction value, and the second reference correction value.

[0006] A display device includes: a display panel including display pixels and light-sensing pixels arranged in a display area of ​​the display panel; a display scan driver configured to drive the display pixels to emit light; a light-sensing scan driver configured to drive the light-sensing pixels to sense light; and a main drive circuit. In one aspect, the main drive circuit is configured to perform operations including: obtaining a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal, and a second pulse wave signal using a biometric information detection device; generating a first reference correction value and a second reference correction value based on the first reference pulse wave signal and the second reference pulse wave signal, respectively; and generating biometric information based on the first pulse wave signal, the second pulse wave signal, the first reference correction value, and the second reference correction value. In one aspect, the main drive circuit guides a biometric signal detection process by displaying an application screen, generating a biometric signal based on the first pulse wave signal and the second pulse wave signal, generating a final measurement result based on the biometric signal, and displaying the final measurement result on the application screen.

[0007] A method for generating biometric information using a display device, the method comprising: obtaining a first reference pulse wave signal from a left arm using a biometric information detection device; obtaining a first pulse wave signal from a right finger using the display device; generating a first reference correction value for the right finger based on the first reference pulse wave signal and the first pulse wave signal; and generating biometric information based on the first reference correction value. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is an example of a perspective view of a display device according to an embodiment of the inventive concept.

[0009] Figure 2 It shows that Figure 1 An example of a plan view of the arrangement structure of the display panel and the main driving circuit shown in FIG.

[0010] Figure 3 and Figure 4 It shows that Figure 1 An example of a side view of the configuration of the display device shown in .

[0011] Figure 5 yes Figures 1 to 4 An example of a schematic layout diagram of a display panel is shown in .

[0012] Figure 6 is an example of a layout diagram illustrating a display area according to an embodiment of the inventive concept.

[0013] Figure 7 is an example of a circuit diagram illustrating a display pixel and a light-sensing pixel according to an embodiment of the inventive concept.

[0014] Figure 8 It shows Figures 1 to 3 An example of a block diagram of a biometric signal detection unit of a main driving circuit is shown in FIG.

[0015] Figure 9 is an example of a diagram illustrating a process of setting a reference correction value based on a pulse wave signal detected from a user's right finger.

[0016] Figure 10 It shows the Figure 9 An example of a waveform diagram of a detected waveform of a pulse wave signal of a biometric signal measurement device.

[0017] Figure 11 It shows the Figure 9 An example of a waveform graph of a detected waveform of a pulse wave signal of a display device.

[0018] Figure 12 is an example of a diagram illustrating a process of setting a reference correction value based on a pulse wave signal detected from a user's left finger.

[0019] Figure 13 It shows the Figure 12 An example of a waveform diagram of a pulse wave signal waveform detected by a biometric signal measurement device.

[0020] Figure 14 It shows the Figure 12 An example of a waveform diagram of a pulse wave signal waveform detected by a display device.

[0021] Figure 15 is an example of a diagram illustrating a measurement process of a plurality of pulse wave signals and biometric information.

[0022] Figure 16 is an example of a diagram showing an image display screen when a pulse wave signal is detected during a measurement period.

[0023] Figure 17 is an example of a waveform diagram showing pulse wave signals detected from different touch positions.

[0024] Figure 18 is an example of a diagram illustrating a method for calculating blood pressure information using a machine learning algorithm according to an embodiment of the inventive concept.

[0025] Figure 19 is an example of a graph illustrating a method for calculating information about heart rate and respiration among biometric information according to an embodiment of the inventive concept.

[0026] Figure 20 is an example of a graph illustrating a method for calculating information about blood vessel elasticity among biometric information according to an embodiment of the inventive concept.

[0027] Figure 21 is an example of a graph illustrating a method for calculating information about cardiovascular disease among biometric information according to an embodiment of the inventive concept.

[0028] Figure 22 is an example of a graph illustrating a method for calculating information about oxygen saturation among biometric information according to an embodiment of the inventive concept. DETAILED DESCRIPTION

[0029] Hereinafter, the present disclosure is described in detail with reference to the accompanying drawings, in which preferred embodiments of the disclosure are shown. However, the disclosure may include different embodiments that may not be shown in the accompanying drawings and, therefore, should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to ensure that the disclosure is thorough and complete and effectively convey the scope of the disclosure to those skilled in the art.

[0030] It will also be understood that when a layer is referred to as being "on" or "under" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can be present. For example, when the disclosure describes a first layer as being disposed on a second layer, the first layer can be directly disposed on the second layer. In some cases, for example, a third layer can be disposed between the first and second layers. In some aspects, like reference numerals refer to like components throughout the specification.

[0031] It will be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first element discussed below may be referred to as the second element without departing from the teachings and spirit of the present disclosure. Similarly, the second element may also be referred to as the first element.

[0032] Each of the features of the various embodiments of the present disclosure can be combined with each other in part or in whole, making various technical interlocks and drives possible. Each embodiment can be implemented independently of each other, or can be implemented together in association.

[0033] Figure 1 is an example of a perspective view of a display device according to an embodiment of the inventive concept. Figure 2 It shows that Figure 1 An example of a plan view of the arrangement structure of the display panel and the main driving circuit shown in FIG. Figure 3 and Figure 4 It shows Figure 1 An example of a side view of the configuration of the display device shown in .

[0034] Reference Figure 1 and Figure 2 According to some embodiments, the display device 10 can be integrated into a portable electronic device such as a mobile phone, smartphone, tablet personal computer, mobile communication terminal, electronic organizer, e-book, portable multimedia player (PMP), navigation system, or ultra-mobile personal computer (UMPC). In some cases, the display device 10 can be integrated into the display unit of a television, laptop computer, monitor, billboard, or Internet of Things (IoT) terminal. In some cases, the display device 10 can be integrated into a wearable device such as a smartwatch, watch phone, glasses-type display, or head-mounted display (HMD). In some cases, the display device 10 can be integrated into a vehicle's dashboard, a vehicle's center instrument panel, a central information display (CID) located on the vehicle's dashboard, a rear-view mirror display that replaces the vehicle's side mirrors, or a display located on the rear surface of a front seat for rear-seat entertainment.

[0035] The display device 10 may be a light-emitting display device, such as an organic light-emitting display device using an organic light-emitting diode (OLED), a quantum dot light-emitting display device including a quantum dot light-emitting layer, an inorganic light-emitting display device including an inorganic semiconductor, and a micro-light-emitting display device using a micro- or nano-light-emitting diode (LED). According to some embodiments, the display device 10 includes an organic light-emitting display device, however, the present disclosure is not necessarily limited thereto.

[0036] Reference Figure 1 and Figure 3 The display device 10 includes a display panel 100, a main driving circuit 200, a circuit board 300, and a touch driving circuit 400. In an embodiment, the display panel 100 may include a touch sensing unit TSU and a display module DU. In some embodiments, the display device 10 further includes Figure 4 In an embodiment, the display module DU may include a substrate SUB, a thin film transistor layer TFTL, a light emitting layer EML, and an encapsulation layer TFEL.

[0037] In a plan view, the display panel 100 can be formed into a rectangular shape having a short side in a first direction DR1 and a long side in a second direction DR2, wherein the second direction DR2 is perpendicular to the first direction DR1. The corners of the display panel 100 can be right angles or rounded to have a predetermined curvature. However, the planar shape of the display panel 100 is not necessarily limited to a rectangular shape. For example, the planar shape of the display panel 100 can be formed into other polygonal shapes, a circular shape, or an elliptical shape. The display panel 100 can be formed flat, but is not necessarily limited to this. For example, the display panel 100 can include curved portions formed at the left and right ends and having a constant curvature or a varying curvature. In some cases, the display panel 100 can be formed flexibly so that the display panel 100 can be bent, curved, folded, or rolled.

[0038] According to some embodiments, the substrate SUB of the display panel 100 may include a main area MA and a sub-area SBA. For example, the main area MA may include a display area DA for displaying an image and a non-display area NDA as a peripheral area of ​​the display area DA. In some cases, the non-display area NDA surrounds the display area DA.

[0039] The non-display area NDA may be disposed adjacent to the display area DA. The non-display area NDA may be an area outside the display area DA. The non-display area NDA may be disposed around the display area DA. The non-display area NDA may be an edge area of ​​the display panel 100.

[0040] The display area DA includes display pixels and light-sensing pixels. For example, the display pixels can be configured to display images, and the light-sensing pixels can be configured to sense light reflected from a user's body part (such as a finger). In some cases, the display area DA may also include infrared-emitting pixels that emit infrared light.

[0041] The display area DA may occupy a majority of the main area MA. The display area DA may be located at the center of the main area MA. In some cases, the display area DA may be divided into an image display area IDA, in which display pixels are provided but no light sensing pixels are provided, and a plurality of biometric information measurement areas FSA1 and FSA2, in which both display pixels and light sensing pixels are provided. For example, light sensing pixels configured to detect light incident on or reflected from the front surface may be provided along with display pixels in predetermined portions of the biometric information measurement areas FSA1 and FSA2 in the display area DA of the display panel 100. An example in which display pixels and light sensing pixels are alternately arranged in the display area DA is described below.

[0042] Reference Figure 2 and Figure 3The sub-region SBA may protrude from one side of the main region MA in the second direction DR2. The length of the sub-region SBA measured in the second direction DR2 may be smaller than the length of the main region MA measured in the second direction DR2. The length of the sub-region SBA measured in the first direction DR1 may be substantially equal to or smaller than the length of the main region MA measured in the first direction DR1.

[0043] The sub-area SBA may include a first area A1, a second area A2, and a bending area BA. For example, the first area A1 is a region that protrudes from one side of the main area MA in the second direction DR2. One side of the first area A1 may contact the non-display area NDA of the main area MA, and the other side (or opposite side) of the first area A1 may contact the bending area BA. In some cases, for example, the bending area BA is disposed between the first area A1 and the second area A2.

[0044] The second area A2 is an area where pads (also called "pads") DP and the main driving circuit 200 are provided. The main driving circuit 200 can be attached to or electrically connected to the driving pads in the second area A2 using a conductive adhesive member, such as an anisotropic conductive layer. The circuit board 300 can also be attached to or electrically connected to the pads DP in the second area A2 using a conductive adhesive member. One side of the second area A2 can contact the bending area BA.

[0045] The bending area BA is a bendable area. When the bending area BA bends, the second area A2 may be positioned below the first area A1 and below the main area MA. The bending area BA may be positioned between the first area A1 and the second area A2. One side of the bending area BA may contact the first area A1, and the other side (e.g., the opposite side) of the bending area BA may contact the second area A2.

[0046] like Figure 3 As shown in FIG, the sub-area SBA may be curved. For example, a portion of the sub-area SBA may be disposed below the main area MA. The sub-area SBA may overlap the main area MA in the third direction DR3. In some cases, the main driving circuit 200, the circuit board 300, and the touch driving circuit 400 may be disposed below the main area MA of the display device 10.

[0047] The touch sensing unit TSU is configured to sense a body part such as a finger or an electronic pen, etc. The touch sensing unit TSU is formed or disposed on the topmost layer of the display panel 100. The touch sensing unit TSU may include a plurality of touch electrodes, thereby sensing a user's touch in a capacitive manner.

[0048] The touch sensing unit TSU includes a plurality of touch electrodes arranged to intersect each other in a first direction DR1 and a second direction DR2. For example, the plurality of touch electrodes include a plurality of drive electrodes arranged to be parallel to each other and spaced apart in the first direction DR1, and a plurality of sense electrodes arranged to be parallel to each other and spaced apart in the second direction DR2. In some cases, the plurality of sense electrodes intersect the plurality of drive electrodes with an organic material layer or an inorganic material layer interposed therebetween. The plurality of drive electrodes and the plurality of sense electrodes may be formed to extend to the display pixels SP arranged in the display area DA (see FIG. 1 ). Figure 5 ) and the light sensing pixels. In some cases, the multiple drive electrodes and the multiple sensing electrodes may not overlap with the display pixels and the light sensing pixels. The multiple drive electrodes and the multiple sensing electrodes form a mutual capacitance and transmit a touch sensing signal that changes according to the user's touch to the touch drive circuit 400.

[0049] The touch drive circuit 400 supplies touch drive signals to a plurality of drive electrodes and receives touch sensing signals from a plurality of sensing electrodes. The touch drive circuit 400 then senses changes in the mutual capacitance between the drive electrodes and the sensing electrodes based on changes in the magnitude of the touch sensing signals. The touch drive circuit 400 generates touch data based on the changes in the mutual capacitance between the drive electrodes and the sensing electrodes and obtains the locations of the sensed touches. The touch drive circuit 400 generates touch data including multiple touch locations and multiple touch location coordinates based on the changes in the mutual capacitance between the touch nodes in the touch sensing unit TSU. Therefore, the touch drive circuit 400 can supply coordinate data of the multiple touch locations of the sensed touches to the main drive circuit 200.

[0050] Figure 4 It shows that Figure 1 An example of a side view of the configuration of the display device shown in FIG. Figure 4 The display device 10 in FIG. 1 includes a pressure sensing unit PSU disposed below the touch sensing unit TSU.

[0051] The pressure sensing unit PSU is configured to sense pressure applied by a body part such as a finger. The pressure sensing unit PSU may be disposed or formed on the front surface (e.g., the topmost layer in a cross-sectional view) of the display module DU. In some cases, for example, the pressure sensing unit PSU is disposed between the touch sensing unit TSU and the substrate SUB.

[0052] In some embodiments, the display device 10 includes a pressure sensing unit PSU to detect absolute blood pressure related measurements. In some embodiments, the display device 10 may not include a pressure sensing unit PSU to detect relative blood pressure related measurements. Figure 3 As shown in , the pressure sensing unit PSU may not be formed.

[0053] Reference Figure 4 The pressure sensing unit PSU may be formed as a transparent sheet type in which a plurality of transparent electrodes are arranged in vertical and horizontal directions. In some cases, the pressure sensing unit PSU may be disposed on the front surface (or upper layer in a cross-sectional view) of the main area MA. In some cases, the pressure sensing unit PSU may be disposed or formed inside or on the front of the display panel 100. For example, the pressure sensing unit PSU may be formed between the touch sensing unit TSU and the substrate SUB.

[0054] The pressure sensing unit (PSU) includes a plurality of pressure sensing electrodes arranged to intersect one another in a first direction DR1 and a second direction DR2. The plurality of pressure sensing electrodes include a plurality of lower electrodes arranged parallel to one another and spaced apart in the first direction DR1, and a plurality of upper electrodes arranged parallel to one another and spaced apart in the second direction DR2. In some cases, the plurality of upper electrodes intersect the plurality of lower electrodes with a transparent inorganic (or organic) material layer interposed therebetween. The plurality of lower electrodes and the plurality of upper electrodes form a self-capacitance with the transparent inorganic (or organic) material layer interposed therebetween. In some cases, the plurality of lower electrodes and the plurality of upper electrodes transmit pressure sensing signals that vary according to touch pressure to the touch drive circuit 400.

[0055] When the pressure sensing unit PSU is provided on the front surface of the display panel 100, the pressure sensing electrodes (e.g., a plurality of lower electrodes and a plurality of upper electrodes) of the pressure sensing unit PSU may be formed to extend to a wiring area between display pixels and light sensing pixels arranged in the display area DA. In some cases, the pressure sensing electrodes may not overlap with the display pixels and the light sensing pixels. In some cases, the touch drive circuit 400 may supply a reference voltage to the lower electrode of the pressure sensing unit PSU and receive a pressure sensing signal from the upper electrode of the pressure sensing unit PSU, thereby sensing a change in the self-capacitance of the pressed area using the pressure sensing signal. Therefore, the touch drive circuit 400 may generate pressure data based on the amount of change in self-capacitance and the sensing coordinate data of the sensed touch position, and supply the generated data to the main drive circuit 200. The pressure sensing unit PSU may be applied to various other structures besides the structure using the pressure sensing electrodes, and is not limited to Figure 3 and Figure 4 Description.

[0056] The circuit board 300 may be connected to an end of the sub-area SBA opposite to the end connected to the main area MA. Thus, the circuit board 300 may be electrically connected to the display panel 100 and the main driving circuit 200. The display panel 100 and the main driving circuit 200 may receive digital video data, timing signals, and driving voltages through the circuit board 300. The circuit board 300 may be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip on film.

[0057] The main drive circuit 200 can generate electrical signals (such as data voltages and control signals) for driving the display panel 100. The touch drive circuit 400 and the main drive circuit 200 can be formed as integrated circuits (ICs) and attached to the display panel 100 or the circuit board 300 using a chip-on-glass (COG) method, a chip-on-plastic (COP) method, or an ultrasonic bonding method, but the present disclosure is not necessarily limited to this. For example, the touch drive circuit 400 and the main drive circuit 200 can be attached to the circuit board 300 using a chip-on-film (COF) method. In some cases, the touch drive circuit 400 and the main drive circuit 200 can be attached to the circuit board 300 separately.

[0058] Figure 5 yes Figures 1 to 4 An example of a schematic layout diagram of a display panel is shown in FIG. Figure 5 1 is a layout diagram illustrating a display area DA and a non-display area NDA of a display module DU before a touch sensing unit TSU is formed thereon.

[0059] Reference Figure 5 and Figure 4 , the display scan driver 110, the light sensing scan driver 120, and the main drive circuit 200 may be provided on the display panel 100 of the display device 10. In some embodiments, the touch drive circuit 400 and the power supply unit may be provided on the circuit board 300, wherein the circuit board 300 is connected to the display panel 100. For example, the main drive circuit 200 and the touch drive circuit 400 may be integrally formed as a single chip type and may be mounted on the display panel 100 or the circuit board 300. However, in order to simplify the functional description, an example in which the main drive circuit 200 and the touch drive circuit 400 are formed as different integrated circuits is described below.

[0060] Reference Figure 5 The display panel 100 may include display pixels SP, light sensing pixels LSP, display scan lines GL, emission control lines VL, data lines DL, sensing scan lines FSL, sensing reset lines REL, and light sensing lines ERL disposed in the display area DA. Each of the display scan driver 110 and the light sensing scan driver 120 is disposed in the non-display area NDA.

[0061] The display scan lines GL sequentially supply display scan signals applied in units of horizontal lines from the display scan driver 110 to the display pixels SP and the light-sensing pixels LSP of each horizontal line. The display scan lines GL may extend in a first direction DR1 and may be spaced apart from each other in a second direction DR2 that crosses the first direction DR1.

[0062] The emission control lines VL sequentially supply emission control signals applied in units of horizontal lines from the display scan driver 110 to the display pixels SP and light-sensing pixels LSP of each horizontal line. The emission control lines VL may extend in a first direction DR1 and may be parallel to the display scan lines GL. In some cases, the emission control lines VL may be spaced apart from each other in a second direction DR2.

[0063] The data lines DL may supply a data voltage from the main driving circuit 200 to the plurality of display pixels SP. The plurality of data lines DL may extend in the second direction DR2 and may be spaced apart from each other in the first direction DR1.

[0064] The light sensing scan lines FSL sequentially supply a sensing scan signal applied in units of horizontal lines from the light sensing scan driver 120 to the plurality of light sensing pixels LSP. The light sensing scan lines FSL may extend in the first direction DR1 and may be spaced apart from each other in the second direction DR2.

[0065] The sensing reset line REL sequentially supplies a sensing reset signal applied in units of horizontal lines from the light-sensing scan driver 120 to a plurality of light-sensing pixels LSP of each horizontal line. The sensing reset line REL may extend in a first direction DR1 and may be parallel to the light-sensing scan line FSL. In some cases, the sensing reset lines REL may be spaced apart from each other in a second direction DR2.

[0066] The light sensing lines ERL are connected between the light sensing pixels LSP and the main driving circuit 200 to supply light sensing signals output from the light sensing pixels LSP to the main driving circuit 200. The light sensing lines ERL may be disposed and extended in the second direction DR2 based on an arrangement direction of the main driving circuit 200 and may be spaced apart from each other in the first direction DR1.

[0067] The non-display area NDA may surround the display area DA. The non-display area NDA may include a display scan driver 110, a light-sensing scan driver 120, fan-out lines FOL, gate control lines GCL, and light-sensing control lines SCL.

[0068] The display pixels SP and the light-sensing pixels LSP may form a first unit pixel and may be arranged in a matrix in the display area DA in a first direction DR1 and a second direction DR2. When at least one infrared light-emitting pixel is additionally provided in the display area DA, the display pixels SP and the at least one infrared light-emitting pixel may form a second unit pixel, and the second unit pixels and the first unit pixels may be alternately arranged in a matrix in the display area DA. For example, a first unit pixel may include a display pixel SP and a light-sensing pixel LSP. For example, a second unit pixel may include a display pixel SP and an infrared light-emitting pixel.

[0069] For example, three display pixels SP that display red light, green light, and blue light, respectively, and one light-sensing pixel LSP may form a first unit pixel. In some embodiments, three display pixels SP that display red light, green light, and blue light, respectively, and one infrared light-emitting pixel may form a second unit pixel. In some cases, each of the pixels of the first unit pixel may be arranged in a quadrant of the first unit pixel. In some cases, each of the pixels of the second unit pixel may be arranged in a quadrant of the second unit pixel. The first unit pixel and the second unit pixel may be arranged alternately in a matrix form with horizontal stripes or vertical stripes. In some cases, the first unit pixel and the second unit pixel may be arranged alternately in a zigzag shape in a plan view, and may be arranged in a matrix form in an oblique direction.

[0070] Each of the red, green, and blue display pixels SP and the infrared light-emitting pixels can be connected to one of the display scan lines GL and one of the emission control lines VL. During an image display period, the red, green, and blue display pixels SP can receive a data voltage from the data line DL based on a display scan signal from the display scan line GL and an emission control signal from the emission control line VL, and can supply a drive current to the light-emitting element based on the data voltage, thereby emitting light. For example, during a measurement period for measuring biometric information such as blood pressure, heart rate, oxygen saturation, or vascular elasticity, the display pixels SP displaying at least one color among the red, green, and blue display pixels SP can selectively receive a data voltage for light emission, a display scan signal, and an emission control signal, and display RGB light. In some cases, during a measurement period for measuring biometric information such as blood pressure, heart rate, or the like, the infrared light-emitting pixels can selectively receive a data voltage for light emission, a display scan signal, and an emission control signal, and display infrared light.

[0071] The light-sensing pixels LSP may be arranged alternately with the red display pixels SP, the green display pixels SP, and the blue display pixels SP in the vertical or horizontal direction. Each of the light-sensing pixels LSP may be connected to one of the light-sensing scan lines FSL, one of the sensing reset lines REL, and one of the light-sensing lines ERL. During a measurement period for measuring biometric information, each of the light-sensing pixels LSP is reset in response to a sensing reset signal from the sensing reset line REL and may generate a light-sensing signal corresponding to the amount of reflected light incident from the front surface. In some cases, each of the light-sensing pixels LSP may transmit a light-sensing signal to the light-sensing line ERL in response to a sensing scan signal from the light-sensing scan line FSL.

[0072] In some cases, each of the light-sensing pixels LSP may be connected to one of the display scan lines GL in units of horizontal lines. Each of the light-sensing pixels LSP may generate a light-sensing signal corresponding to the amount of reflected light incident from the front surface, and may output the light-sensing signal to the light-sensing line ERL in response to a display scan signal input through the display scan line GL.

[0073] The display scan driver 110 may be disposed in the non-display area NDA. Although the display scan driver 110 is shown as being disposed on one side (e.g., the left side) of the display panel 100, this is not necessarily limited to the drawings herein. For example, the display scan driver 110 may be disposed on both sides (e.g., the left and right sides) of the display panel 100.

[0074] The display scan driver 110 can be electrically connected to the main driving circuit 200 via the gate control line GCL. The display scan driver 110 receives a scan control signal from the main driving circuit 200, and sequentially generates display scan signals in units of horizontal line driving periods based on the scan control signal, and sequentially supplies the display scan signals to the display scan lines GL. For example, the display scan driver 110 can sequentially generate emission control signals based on the scan control signal from the main driving circuit 200, and sequentially supply the emission control signals to the emission control lines VL.

[0075] The gate control line GCL may extend from the main driving circuit 200 to the display scan driver 110 based on the arrangement position of the display scan driver 110. The gate control line GCL may supply a scan control signal received from the main driving circuit 200 to the display scan driver 110.

[0076] The light-sensing scan driver 120 may be disposed on another side of the non-display area NDA that is different from the side where the display scan driver 110 is located. Figure 5 The light sensing scan driver 120 is shown as being disposed on the other side (e.g., the right side) of the display panel 100, but the present disclosure is not necessarily limited thereto. The light sensing scan driver 120 can be electrically connected to the main drive circuit 200 via a light sensing control line SCL. The light sensing scan driver 120 receives a light sensing control signal from the main drive circuit 200 and, based on the light sensing control signal, sequentially generates a reset control signal and a light sensing scan signal in units of horizontal line drive periods. The sequentially generated reset control signal is then sequentially supplied to the sensing reset line REL. For example, the light sensing scan driver 120 can sequentially generate a sensing scan signal based on the light sensing control signal from the main drive circuit 200 and sequentially supply the sensing scan signal to the sensing scan line FSL.

[0077] The light-sensing control line SCL may extend from the main driving circuit 200 to the light-sensing scan driver 120 based on the arrangement position of the light-sensing scan driver 120. The light-sensing control line SCL may supply a light-sensing control signal received from the main driving circuit 200 to the light-sensing scan driver 120.

[0078] The sub-area SBA may include a main drive circuit 200, a display pad area DPA, and a first touch pad area TPA1 and a second touch pad area TPA2. The display pad area DPA, the first touch pad area TPA1, and the second touch pad area TPA2 may be disposed at the edges of the sub-area SBA. In some cases, the display pad area DPA may be disposed between the first touch pad area TPA1 and the second touch pad area TPA2 in the first direction DR1. In some cases, the main drive circuit 200 may be disposed between the non-display area NDA and the display pad area DPA in the second direction DR2. The display pad area DPA, the first touch pad area TPA1, and the second touch pad area TPA2 may be electrically connected to the circuit board 300 using an anisotropic conductive layer or a low-resistance, high-reliability material such as SAP. In an embodiment, the pad DP may be disposed in the display pad area DPA, the first touch pad TP1 may be disposed in the first touch pad area TPA1, and the second touch pad TP2 may be disposed in the second touch pad area TPA2.

[0079] The fan-out line FOL may extend from the main driving circuit 200 to the display area DA. For example, the fan-out line FOL is connected so that a data voltage received from the main driving circuit 200 can be supplied to each of the plurality of data lines DL. In some cases, the gate control line GCL and the light sensing control line SCL may extend from the main driving circuit 200 to the display scan driver 110 and the light sensing scan driver 120, respectively, in the non-display area NDA.

[0080] The main driving circuit 200 can output signals and voltages for driving the display panel 100 to the fan-out lines FOL. The main driving circuit 200 can supply data voltages to the data lines DL via the fan-out lines FOL. The data voltages can be supplied to the plurality of display pixels SP to determine the brightness of the display pixels SP. The main driving circuit 200 can supply scan control signals to the display scan driver 110 via the gate control lines GCL.

[0081] The main driving circuit 200 receives a light sensing signal from the light sensing pixel LSP through the light sensing line ERL and detects a photoplethysmography signal among the biometric signals based on a change in the magnitude of the light sensing signal. For example, the light sensing signal includes a pulse wave signal.

[0082] In addition to pulse wave signals, biometric signals may also include EMG signals, EEG signals, and the like. However, the following describes an example in which the main drive circuit 200 detects and analyzes the pulse wave signal among the biometric signals to measure biometric information. The user's biometric information includes information such as blood pressure, heart rate, heart rate variability, respiratory rate, vascular elasticity, the presence or absence of cardiovascular disease, and oxygen saturation.

[0083] The main driving circuit 200 receives the user's biometric information (such as a pulse wave signal) through a separate biometric information detection device (such as a cuff-type blood pressure measurement device), which measures the biometric signal (such as a pulse wave signal) by applying pressure to a body part of the user.

[0084] The main drive circuit 200 receives the pulse wave signal and biometric information detected from the left arm and uses an application screen to guide the pulse wave signal detection process, allowing the pulse wave signal to be detected from the right finger. The main drive circuit 200 detects the pulse wave signal in real time from the right finger or other body part. Therefore, the main drive circuit 200 digitally stores the characteristics of the left arm pulse wave signal, namely, the amplitude and pulse width range (value range) of the left arm pulse wave signal detected by a separate biometric information detection device, the systolic and diastolic periods of the left arm pulse wave signal, the systolic blood pressure variation width range (value range) of the left arm pulse wave signal, and the variation range (value range) of the systolic period and diastolic period of the left arm pulse wave signal. In some cases, pulse wave signal characteristics are digitally stored, namely, the amplitude and pulse width range (numerical range) of the right finger pulse wave signal detected by the right finger, the systolic and diastolic periods of the right finger pulse wave signal, the systolic blood pressure variation width range (numerical range) of the right finger pulse wave signal, and the systolic and diastolic period variation ranges (numerical range) of the right finger pulse wave signal. The main drive circuit 200 replaces the numerical characteristic information of the right finger pulse wave signal with the numerical characteristic information of the left arm pulse wave signal detected by the biometric information detection device, and sets a reference correction value for the right finger (hereinafter referred to as the first reference correction value) based on the average value or difference. In setting the first reference correction value, the left arm and right finger pulse wave signal detection process may be repeated multiple times (e.g., at least three times) to extract the reference correction value, and the first reference correction value may be set as the average value of the extracted reference values. In some cases, the extraction process is repeated to ensure the accuracy of the first reference correction value. However, embodiments are not necessarily limited to this. For example, the first reference correction value may be determined based on a single extraction process.

[0085] Similarly, the main drive circuit 200 receives the pulse wave signal and biometric information detected by the user's right hand and uses an application screen to guide the pulse wave signal detection process, allowing the pulse wave signal to be detected by the user's left finger. The main drive circuit 200 detects the pulse wave signal in real time using the left finger. Therefore, the main drive circuit 200 digitally stores the characteristics of the right arm pulse wave signal, namely, the amplitude and pulse width range (value range) of the right arm pulse wave signal detected by the separate biometric information detection device, the systolic and diastolic periods of the right arm pulse wave signal, the systolic blood pressure variation width range (value range) of the right arm pulse wave signal, and the variation range (value range) of the systolic and diastolic periods of the right arm pulse wave signal. In some cases, pulse wave signal characteristics are digitally stored, namely, the amplitude and pulse width range (value range) of the left finger pulse wave signal detected by the left finger, the systolic and diastolic periods of the left finger pulse wave signal, the systolic blood pressure variation width range (value range) of the left finger pulse wave signal, and the systolic and diastolic period variation ranges (value range) of the left finger pulse wave signal. The main drive circuit 200 replaces the numerical feature information of the left finger pulse wave signal with the numerical feature information of the right arm pulse wave signal detected by the biometric information detection device, and sets a reference correction value for the left finger (hereinafter, the second reference correction value) based on the average value or difference. In setting the second reference correction value, the right arm and left finger pulse wave signal detection process can be repeated multiple times (e.g., at least three times) to extract the reference correction value, and the second reference correction value can be set as the average value of the extracted reference values. In some cases, the extraction process is repeated to ensure the accuracy of the second reference correction value. However, embodiments are not necessarily limited to this. For example, the second reference correction value may be determined based on a single extraction process.

[0086] The main driving circuit 200 stores the first reference correction value and the second reference correction value, respectively, and guides the pulse wave signal detection process using the application screen so that when a user's biometric information is measured through the application, the pulse wave signal can be detected by both the left and right fingers. Then, each of the pulse wave signals is detected by both the left and right fingers.

[0087] The main driving circuit 200 uses a preset machine learning algorithm based on a preset and pre-stored first reference correction value to analyze the pulse wave signal detected in real time by the right finger, thereby measuring first biometric information such as blood pressure, heart rate, and heart rate variability. In some cases, the main driving circuit 200 uses a preset machine learning algorithm based on a preset and pre-stored second reference correction value to analyze the pulse wave signal detected in real time by the left finger, thereby measuring second biometric information such as blood pressure, heart rate, and heart rate variability.

[0088] For example, the main driving circuit 200 may select the biometric information in which the measured blood pressure level is higher between the first and second biometric information as the user's real-time biometric information, and display the selected biometric information on the application screen. In some cases, the main driving circuit 200 may generate digital video data based on the touch coordinates of the touch coordinate data from the touch driving circuit 400, or execute an application indicated by an icon displayed on the user's touch coordinates.

[0089] Figure 6 1 is an example of a layout diagram showing a display area according to an embodiment. Figure 6 The display area DA may include display pixels SP, infrared light emitting pixels ISP, and light sensing pixels LSP. For example, the display pixels SP may include a first display pixel SP1, a second display pixel SP2, and a third display pixel SP3.

[0090] The light sensing pixel LSP, the first display pixel SP1, the second display pixel SP2 and the third display pixel SP3 may be formed as a first unit pixel PG1. For example, the infrared light emitting pixel ISP, the first display pixel SP1, the second display pixel SP2 and the third display pixel SP3 may be formed as a second unit pixel PG2.

[0091] The first unit pixels PG1 and the second unit pixels PG2 may be display pixels that are the smallest units capable of displaying light, and each first unit pixel PG1 may sense light. The first unit pixels PG1 and the second unit pixels PG2 may be alternately arranged in a zigzag pattern in a plan view, and may be arranged in a matrix in an oblique direction. For example, the first unit pixels PG1 and the second unit pixels PG2 may be alternately arranged in a matrix in a plan view in horizontal stripes or vertical stripes.

[0092] The first display pixel SP1 may include a first light emitting unit ELU1 that emits first light and a first pixel driver DDU1 for applying a driving current to the light emitting element of the first light emitting unit ELU1. The first light may be light in the red wavelength band. For example, the main peak wavelength of the first light may be between approximately 600 nm and 750 nm.

[0093] The second display pixel SP2 may include a second light-emitting unit ELU2 that emits a second light and a second pixel driver DDU2 for applying a driving current to the light-emitting element of the second light-emitting unit ELU2. The second light may be light in a blue wavelength band. For example, the main peak wavelength of the second light may be between approximately 370 nm and 460 nm.

[0094] The third display pixel SP3 may include a third light-emitting unit ELU3 that emits a third light and a third pixel driver DDU3 for applying a driving current to the light-emitting element of the third light-emitting unit ELU3. For example, the third light may be light in the green wavelength band. For example, the main peak wavelength of the third light may be between approximately 480 nm and 560 nm.

[0095] The infrared light-emitting pixel ISP may include an infrared light-emitting unit ILU that emits light in the infrared band and an infrared light pixel driver IDU for applying a driving current to the light-emitting element of the infrared light-emitting unit ILU. The main peak wavelength of infrared light may be between approximately 750nm and 1mm. In some cases, the light-sensing pixel LSP includes a light-sensing unit PDU and a sensing driver FDU.

[0096] In the first unit pixel GP1, the first to third pixel drivers DDU1 to DDU3 may be arranged in a predetermined order in a first direction DR1. In some cases, any one of the first to third pixel drivers DDU1 to DDU3 may be arranged in the first direction DR1 of another adjacent pixel driver. For example, the sensing driver FDU may be arranged in the first direction DR1 of any one of the first to third pixel drivers DDU1 to DDU3. In some cases, the sensing driver FDU may be arranged in the second direction DR2 of any one of the first to third pixel drivers DDU1 to DDU3.

[0097] The first pixel drivers DDU1 adjacent to each other in the direction of the data line DL may be arranged in the second direction DR2. The second pixel drivers DDU2 adjacent to each other in the direction of the data line DL may be arranged in the second direction DR2. Similarly, the sensing drivers FDU adjacent to each other in the direction of the data line DL may also be arranged in the second direction DR2.

[0098] The first light-emitting unit ELU1, the second light-emitting unit ELU2, the third light-emitting unit ELU3, the infrared light-emitting unit ILU, and the light-sensing unit PDU may have a rectangular, octagonal, or rhombus planar shape, but the present disclosure is not necessarily limited thereto. The first light-emitting unit ELU1, the second light-emitting unit ELU2, the third light-emitting unit ELU3, the infrared light-emitting unit ILU, and the light-sensing unit PDU may have other polygonal planar shapes besides a rectangular, octagonal, and rhombus planar shape.

[0099] In some cases, due to the arrangement positions and planar shapes of the first light-emitting unit ELU1, the second light-emitting unit ELU2, the third light-emitting unit ELU3, and the light-sensing unit PDU, the distance D12, the distance D23, the distance D14, and the distance D34 may be substantially the same. For example, the distance D12 is measured between the center C1 of the first light-emitting unit ELU1 and the center C2 of the second light-emitting unit ELU2, which are adjacent to each other. For example, the distance D23 is measured between the center C2 of the second light-emitting unit ELU2 and the center C3 of the third light-emitting unit ELU3, which are adjacent to each other. For example, the distance D14 is measured between the center C1 of the first light-emitting unit ELU1 and the center C4 of the light-sensing unit PDU, which are adjacent to each other in another direction. For example, the distance D34 is measured between the center C4 of the light-sensing unit PDU and the center C3 of the third light-emitting unit ELU3.

[0100] Figure 7 1 is an example of a circuit diagram illustrating a display pixel and a light sensing pixel according to an embodiment of the inventive concept. Figure 7 , each display pixel SP can be connected to a kth display initialization line GILk, a kth display scan line GLk, a kth display control line GCLk, and a kth emission control line VLk. In some cases, the display pixel SP can be connected to a first drive voltage line VDL supplied with a first drive voltage, a second drive voltage line VSL supplied with a second drive voltage, and a third drive voltage line VIL supplied with a third drive voltage. Hereinafter, alphabetical letters k, n, etc. used instead of numbers are defined as natural numbers (i.e., positive integers) that do not include 0.

[0101] The display pixel SP may include a light emitting unit ELU and a pixel driver DDU. The light emitting unit ELU may include a light emitting element LEL. The pixel driver DDU may include a driving transistor DT, a switching element, and a capacitor CST1. The switching element includes first to sixth transistors ST1, ST2, ST3, ST4, ST5, and ST6.

[0102] The driving transistor DT may include a gate electrode, a first electrode, and a second electrode. The driving transistor DT controls a drain-source current Ids (hereinafter referred to as a "driving current") flowing between the first electrode and the second electrode based on a data voltage applied to the gate electrode. The driving current Ids flowing through the channel of the driving transistor DT is proportional to the square of the difference between the threshold voltage and the voltage Vsg between the first electrode and the gate electrode of the driving transistor DT, as shown in Equation (1).

[0103] (1) In equation (1), k' is a proportionality coefficient determined by the structure and physical characteristics of the driving transistor DT, Vsg is a voltage measured between the first electrode and the gate electrode of the driving transistor DT, and Vth is a threshold voltage of the driving transistor DT.

[0104] The light emitting element LEL emits light by the driving current Ids. As the driving current Ids increases, the amount of light emitted from the light emitting element LEL may increase.

[0105] The light-emitting element LEL may be an organic light-emitting diode including an organic light-emitting layer disposed between an anode electrode and a cathode electrode. In some cases, the light-emitting element LEL may be an inorganic light-emitting element including an inorganic semiconductor disposed between the anode electrode and the cathode electrode. In some cases, the light-emitting element LEL may be a quantum dot light-emitting element including a quantum dot light-emitting layer disposed between the anode electrode and the cathode electrode. In some cases, the light-emitting element LEL may be a micro light-emitting element including a micro light-emitting diode disposed between the anode electrode and the cathode electrode.

[0106] The anode electrode of the light emitting element LEL is connected to the first electrode of the fourth transistor ST4 and the second electrode of the sixth transistor ST6 , and the cathode electrode of the light emitting element LEL is connected to the second driving voltage line VSL. A parasitic capacitor Cel is formed between the anode electrode and the cathode electrode of the light emitting element LEL.

[0107] The first transistor ST1 is turned on by the display initialization signal of the kth display initialization line GILk to connect the gate electrode of the drive transistor DT to the third drive voltage line VIL. Therefore, the third drive voltage of the third drive voltage line VIL can be applied to the gate electrode of the drive transistor DT. The gate electrode of the first transistor ST1 can be connected to the kth display initialization line GILk, the first electrode of the first transistor ST1 can be connected to the gate electrode of the drive transistor DT, and the second electrode of the first transistor ST1 can be connected to the third drive voltage line VIL.

[0108] The second transistor ST2 is turned on by the display scan signal of the k-th display scan line GLk to connect the first electrode of the drive transistor DT to the data line DL. Therefore, the data voltage of the data line DL can be applied to the first electrode of the drive transistor DT. The gate electrode of the second transistor ST2 can be connected to the k-th display scan line GLk, the first electrode of the second transistor ST2 can be connected to the first electrode of the drive transistor DT, and the second electrode of the second transistor ST2 can be connected to the data line DL.

[0109] The third transistor ST3 is turned on by the display scan signal of the k-th display scan line GLk to connect the gate electrode of the drive transistor DT to the second electrode of the third transistor ST3. When the gate electrode of the drive transistor DT is connected to the second electrode of the third transistor ST3, the drive transistor DT is driven as a diode. The gate electrode of the third transistor ST3 can be connected to the k-th display scan line GLk, the first electrode of the third transistor ST3 can be connected to the second electrode of the drive transistor DT, and the second electrode of the third transistor ST3 can be connected to the gate electrode of the drive transistor DT.

[0110] The fourth transistor ST4 is turned on by the display control signal of the kth display control line GCLk to connect the anode electrode of the light-emitting element LEL to the third drive voltage line VIL. The third drive voltage of the third drive voltage line VIL can be applied to the anode electrode of the light-emitting element LEL. The gate electrode of the fourth transistor ST4 is connected to the kth display control line GCLk, the first electrode of the fourth transistor ST4 is connected to the anode electrode of the light-emitting element LEL, and the second electrode of the fourth transistor ST4 is connected to the third drive voltage line VIL.

[0111] The fifth transistor ST5 is turned on by the emission signal of the k-th emission control line VLk to connect the first electrode of the driving transistor DT to the first driving voltage line VDL. The gate electrode of the fifth transistor ST5 is connected to the k-th emission control line VLk, the first electrode of the fifth transistor ST5 is connected to the first driving voltage line VDL, and the second electrode of the fifth transistor ST5 is connected to the first electrode of the driving transistor DT.

[0112] The sixth transistor ST6 is disposed between the second electrode of the drive transistor DT and the anode electrode of the light-emitting element LEL. The sixth transistor ST6 is turned on by an emission control signal of the kth emission control line VLk to connect the second electrode of the drive transistor DT to the anode electrode of the light-emitting element LEL. The gate electrode of the sixth transistor ST6 is connected to the kth emission control line VLk, the first electrode of the sixth transistor ST6 is connected to the second electrode of the drive transistor DT, and the second electrode of the sixth transistor ST6 is connected to the anode electrode of the light-emitting element LEL.

[0113] When both the fifth transistor ST5 and the sixth transistor ST6 are turned on, the driving current Ids of the driving transistor DT according to the data voltage applied to the gate electrode of the driving transistor DT may flow to the light emitting element LEL.

[0114] The capacitor CST1 is formed between the gate electrode of the driving transistor DT and the first driving voltage line VDL. A first capacitor electrode of the capacitor CST1 may be connected to the gate electrode of the driving transistor DT, and a second capacitor electrode of the capacitor CST1 may be connected to the first driving voltage line VDL.

[0115] When the first electrode of the driving transistor DT and each of the first to sixth transistors ST1 to ST6 is a source electrode, the second electrode of the driving transistor DT and each of the first to sixth transistors ST1 to ST6 may be a drain electrode. In some cases, when the first electrode of the driving transistor DT and each of the first to sixth transistors ST1 to ST6 is a drain electrode, the second electrode of the driving transistor DT and each of the first to sixth transistors ST1 to ST6 may be a source electrode.

[0116] The active layer of each of the driving transistor DT and the first to sixth transistors ST1 to ST6 may include at least one of polysilicon, amorphous silicon, and an oxide semiconductor. Figure 7 , the first to sixth transistors ST1 to ST6 and the driver transistor DT have been described as including P-type MOSFETs, but the present disclosure is not necessarily limited thereto. For example, the first to sixth transistors ST1 to ST6 and the driver transistor DT may include N-type MOSFETs. In some cases, at least one of the first to sixth transistors ST1 to ST6 may include an N-type MOSFET.

[0117] The light-sensing pixels LSP are electrically connected to the nth sensing reset line RSLn, the nth light-sensing scan line FSLn, and the nth light-sensing line RLn, respectively. Each of the light-sensing pixels LSP can be reset by a reset signal from the nth sensing reset line RSLn and can transmit a light-sensing signal to each nth light-sensing line RLn in response to a sensing scan signal from the nth light-sensing scan line FSLn.

[0118] The light sensing pixel LSP may include a light sensing unit PDU and a sensing driver FDU. For example, the light sensing unit PDU includes a light sensing element PD. For example, the sensing driver FDU includes first to third sensing transistors RT1 to RT3 and a sensing capacitor. For example, the sensing capacitor may be formed in parallel with the light sensing element PD.

[0119] The first sensing transistor RT1 of the sensing driver FDU can flow a light sensing current based on the voltages of the light sensing element PD and the sensing capacitor. The amount of the light sensing current can vary based on the voltages applied to the light sensing element PD and the sensing capacitor. The gate electrode of the first sensing transistor RT1 can be connected to the second electrode of the light sensing element PD. The first electrode of the first sensing transistor RT1 can be connected to a common power supply Vcom to which a common voltage is applied. The second electrode of the first sensing transistor RT1 can be connected to the first electrode of the second sensing transistor RT2.

[0120] When a sensing scan signal with a gate-on voltage is applied to the nth light-sensing scan line FSLn, the second sensing transistor RT2 enables the sensing current of the first sensing transistor RT1 to flow to the nth light-sensing line RLn. For example, the nth light-sensing line RLn can be charged with a sensing voltage by the sensing current. The gate electrode of the second sensing transistor RT2 can be connected to the nth light-sensing scan line FSLn, the first electrode of the second sensing transistor RT2 can be connected to the second electrode of the first sensing transistor RT1, and the second electrode of the second sensing transistor RT2 can be connected to the nth light-sensing line RLn.

[0121] When a reset signal of a gate-on voltage is applied to the nth sensing reset line RSLn, the third sensing transistor RT3 can reset the voltage of the light sensing element PD and the sensing capacitor to the reset voltage of the reset power supply VRST. The gate electrode of the third sensing transistor RT3 can be connected to the sensing reset line RSL, the first electrode of the third sensing transistor RT3 can be connected to the reset power supply VRST, and the second electrode of the third sensing transistor RT3 can be connected to the second electrode of the light sensing element PD. In some cases, the second electrode of the third sensing transistor RT3 can be connected to the gate electrode of the first sensing transistor RT1.

[0122] According to some embodiments, the first sensing transistor RT1 and the second sensing transistor RT2 each include a P-type metal oxide semiconductor field effect transistor (MOSFET), and the third sensing transistor RT3 includes an N-type MOSFET. However, the embodiments of the present disclosure are not necessarily limited to this. For example, the first sensing transistor RT1, the second sensing transistor RT2, and the third sensing transistor RT3 may selectively include the same type or different types. For example, one of the first electrode and the second electrode of each of the first sensing transistor RT1, the second sensing transistor RT2, and the third sensing transistor RT3 may be a source electrode, and the other of the first electrode and the second electrode may be a drain electrode.

[0123] Figure 8 It shows Figures 1 to 3 An example of a block diagram of a biometric signal detection unit of a main driving circuit is shown in FIG. Figure 8 The main driving circuit 200 includes a short-range communication unit 211, a first reference correction value setting unit 212, a second reference correction value setting unit 213, a reference correction value storage unit 214, a first pulse wave signal input unit 221, a second pulse wave signal input unit 222, a programming processor 223, and a biometric signal output unit 224. In some embodiments, each of the units of the main driving circuit 200 can be implemented as software, firmware, one or more hardware circuits, or a combination thereof stored in a memory unit and executable by a processor unit.

[0124] The short-range communication unit 211 receives a first reference pulse wave signal and first reference biometric information from the user. For example, the first reference pulse wave signal may be detected from a right finger via the display device 10. For example, the first reference biometric information may be detected from a left arm via a separate biometric information detection device, such as a blood pressure cuff. In some cases, the short-range communication unit 211 may receive the first reference pulse wave signal and first reference biometric information transmitted via a wireless communication module, such as Bluetooth or Wi-Fi. In some cases, for example, the short-range communication unit 211 receives a second reference pulse wave signal detected from a left finger and second reference biometric information detected from a right arm.

[0125] The main processing unit of the main driving circuit 200 or the biometric signal output unit 224 of the main driving circuit 200 can guide the pulse wave signal detection process through the application screen during the first reference pulse wave signal reception period and the second reference pulse wave signal reception period. Therefore, the user brings the right and left hands into contact with the display screen on which the application is displayed, and the first and second pulse wave signals are measured.

[0126] The first pulse wave signal input unit 221 may first receive the first pulse wave signal detected by the right finger. The first pulse wave signal input unit 221 receives a light sensing signal through the light sensing line ERL during a period in which the first reference pulse wave signal and the first reference biometric information are received through the short-range communication unit 211, and transmits the first pulse wave signal based on the light sensing signal to the first reference correction value setting unit 212.

[0127] Thereafter, the second pulse wave signal input unit 222 may receive the second pulse wave signal detected by the left finger. The second pulse wave signal input unit 222 receives the light sensing signal through the light sensing line ERL during a period in which the second reference pulse wave signal and the second reference biometric information are received through the short-range communication unit 211, and transmits the second pulse wave signal based on the light sensing signal to the second reference correction value setting unit 213.

[0128] The first reference correction value setting unit 212 replaces the numerical feature information of the first pulse wave signal based on the numerical feature information of the first reference pulse wave signal, and sets the first reference correction value regarding the right finger based on the average value or the difference value.

[0129] For example, the first reference correction value setting unit 212 digitally stores the amplitude and pulse width range (numerical range) of the first reference pulse wave signal, the systolic and diastolic periods of the first reference pulse wave signal, the systolic blood pressure variation width range (numerical range) of the first reference pulse wave signal, the systolic period of the first reference pulse wave signal, and the diastolic period variation range (numerical range) of the first reference pulse wave signal. In some cases, the amplitude and pulse width range (numerical range), the systolic and diastolic periods of the first pulse wave signal, the systolic blood pressure variation width range (numerical range) of the first pulse wave signal received through the first pulse wave signal input unit 221, and the systolic period of the first pulse wave signal and the diastolic period variation range (numerical range) of the first pulse wave signal are detected.

[0130] The first reference correction value setting unit 212 replaces the numerical feature information of the first pulse wave signal based on the numerical feature information of the first reference pulse wave signal and calculates at least one of a median, an average, and a difference between the numerical feature information of the first pulse wave signal and the numerical feature information of the first reference pulse wave signal to generate a first reference correction value for each numerical feature information. For example, when the first reference correction value is replaced with the numerical feature information of the first pulse wave signal based on the numerical feature information of the first reference pulse wave signal at least three times, a median average, a difference average, and a total average value can be set.

[0131] In some cases, the second reference correction value setting unit 213 replaces the numerical feature information of the second pulse wave signal based on the numerical feature information of the second reference pulse wave signal. In some cases, the second reference correction value setting unit 213 sets the second reference value for the left finger based on an average value or a difference value.

[0132] For example, the second reference correction value setting unit 213 digitally stores the amplitude and pulse width range (numerical range) of the second reference pulse wave signal, the systolic period and diastolic period of the second reference pulse wave signal, the systolic blood pressure variation width range (numerical range) of the second reference pulse wave signal, the systolic period of the second reference pulse wave signal, and the diastolic period variation range (numerical range) of the second reference pulse wave signal. In some cases, the amplitude and pulse width range (numerical range), the systolic period and diastolic period of the second pulse wave signal, the systolic blood pressure variation width range (numerical range), the systolic period of the second pulse wave signal, and the diastolic period variation range (numerical range) of the second pulse wave signal received through the second pulse wave signal input unit 222 are detected.

[0133] The second reference correction value setting unit 213 replaces the numerical feature information of the second pulse wave signal based on the numerical feature information of the second reference pulse wave signal and calculates at least one of a median, an average, and a difference between the numerical feature information of the second pulse wave signal and the numerical feature information of the second reference pulse wave signal to generate a second reference correction value for each numerical feature information. For example, when the second reference correction value is replaced with the numerical feature information of the second pulse wave signal based on the numerical feature information of the second reference pulse wave signal at least three times, a median average, a difference average, and a total average value can be set.

[0134] The reference correction value storage unit 214 stores the updated first reference correction value from the first reference correction value setting unit 212 in real time. The reference correction value storage unit 214 stores the updated second reference correction value from the second reference correction value setting unit 213 in real time.

[0135] In some cases, the main driving circuit 200 stores each of the first reference correction value and the second reference correction value in the reference correction value storage unit 214. In some cases, the main driving circuit 200 guides the pulse wave signal detection process using an application screen so that the pulse wave signal can be detected through both the left and right fingers when the user's biometric information is requested to be measured through the application.

[0136] The programming processor 223 receives the first pulse wave signal and the second pulse wave signal in real time through the first pulse wave signal input unit 221 and the second pulse wave signal input unit 222 during the measurement period of the biometric information through the application screen.

[0137] The programming processor 223 uses a preset machine learning algorithm to analyze the first pulse wave signal and the second pulse wave signal input in real time based on the pre-stored first reference correction value and the pre-stored second reference correction value. For example, the programming processor 223 uses a preset machine learning algorithm to analyze the first pulse wave signal detected in real time based on the pre-stored first reference correction value and generates first biometric information such as blood pressure, heart rate, and heart rate variability.

[0138] In some cases, the programming processor 223 uses a preset machine learning algorithm to analyze the second pulse wave signal detected in real time based on a pre-stored second reference correction value and generates second biometric information such as blood pressure, heart rate, and heart rate variation.

[0139] In some cases, for example, the biometric signal output unit 224 selects one of the first and second biometric information measured by the programming processor 223, which has an abnormal level (e.g., a high blood pressure level), as real-time biometric information and displays the abnormal biometric information on the application screen. In one aspect, the biometric signal output unit 224 may generate digital video data corresponding to the user's touch coordinates based on the touch coordinate data, or may execute an application indicated by an icon displayed at the user's touch coordinates.

[0140] In some cases, a machine learning algorithm is a computational algorithm designed to recognize patterns, make predictions, or perform specific tasks without being explicitly programmed. According to some aspects, the machine learning model is implemented as software, firmware, one or more hardware circuits, or a combination thereof, stored in a memory unit and executable by a processor unit. In some cases, the machine learning algorithm is executed using the machine learning model.

[0141] According to some embodiments of the present disclosure, a machine learning model includes an ANN, which is a hardware or software component that includes multiple connected nodes (e.g., artificial neurons) that roughly correspond to neurons in the human brain. Each connection or edge transmits a signal from one node to another (like a physical synapse in the brain). When a node receives a signal, the node processes the signal and then transmits the processed signal to other connected nodes. In some cases, the signals between nodes include real numbers, and the output of each node is calculated as a function of the sum of its inputs. In some examples, the nodes can determine the output using other mathematical algorithms (e.g., selecting the maximum value from the input as the output) or any other suitable algorithm for activating the node. Each node and edge is associated with one or more node weights that determine how to process and transmit the signal.

[0142] During the training process, one or more node weights are adjusted to improve the accuracy of the results (e.g., by minimizing a loss function that corresponds in some way to the difference between the current result and the target result). The weights of the edges increase or decrease the strength of the signal transmitted between the nodes. In some cases, nodes have a threshold below which no signal is transmitted at all. In some examples, nodes are grouped into layers. Different layers perform different transformations on their respective inputs. The initial layer is called the input layer, while the final layer is called the output layer. In some cases, the signal passes through a particular layer multiple times.

[0143] In one aspect, a machine learning model includes machine learning parameters. Machine learning parameters, also known as model parameters or weights, are variables that provide the behavior and characteristics of a machine learning model. Machine learning parameters can be learned or estimated from training data and used to make predictions or perform tasks based on learned patterns and relationships in the data.

[0144] During the training process, machine learning parameters are adjusted to minimize a loss function or maximize a performance metric. The goal of the training process is to find the optimal values ​​for the parameters that allow the machine learning model to make accurate predictions or perform well on a given task.

[0145] For example, during the training process, the algorithm adjusts machine learning parameters based on optimization techniques (such as gradient descent, stochastic gradient descent, or other optimization algorithms) to minimize the error or loss between the predicted output and the actual target. Once the machine learning parameters are learned from the training data, the machine learning parameters are used to make predictions on new, unseen data.

[0146] According to some embodiments, the machine learning model includes a computer-implemented recurrent neural network (RNN). An RNN is a type of ANN in which the connections between nodes form a directed graph along an ordered (e.g., temporal) sequence. This enables RNNs to model temporal dynamics, such as predicting which element in a sequence should appear next. Therefore, RNNs are suitable for tasks involving ordered sequences, such as text recognition (where words are ordered in a sentence). In some cases, the RNN includes one or more finite-spiking recurrent networks (characterized by nodes forming a directed acyclic graph), one or more infinite-spiking recurrent networks (characterized by nodes forming a directed cyclic graph), or a combination thereof.

[0147] Figure 9 1 is an example of a diagram illustrating a process of setting a reference correction value based on a pulse wave signal detected from a user's right finger. For example, the diagram includes a display device 10 and a separate biometric information detection device OMC including a cuff. Figure 10 It shows the Figure 9 An example of a waveform graph of a pulse wave signal detected by a biometric signal measurement device. For example, the y-axis of the waveform graph represents oscillation amplitude, and the x-axis of the waveform graph represents time.

[0148] Reference Figure 9 and Figure 10 , the user uses a separate biometric information detection device OMC (such as a cuff-type blood pressure measurement device) and detects a first reference pulse wave signal of the left arm during a period of generating a first reference correction value.

[0149] The biometric information detection device OMC detects a first reference pulse wave signal after applying pressure to the user's left arm, and uses a preset program to analyze characteristics of the first reference pulse wave signal (such as pulse width f1 and amplitude f2) to generate first reference biometric information (such as blood pressure, electrocardiogram, heart rate, etc.).

[0150] The biometric information detection device OMC transmits the first reference pulse wave signal and the first reference biometric information to a wireless communication module such as Bluetooth and Wi-Fi, and the main driving circuit 200 receives the first reference pulse wave signal and the first reference biometric information via the wireless communication module and the short-range communication unit 211. In some cases, the biometric information detection device OMC transmits the first reference pulse wave signal and the first reference biometric information directly to the short-range communication unit 211.

[0151] Figure 11 Is shown by Figure 9 An example of a waveform graph of a detected waveform of a pulse wave signal detected by a display device. For example, the y-axis of the waveform graph represents the PPG signal, and the x-axis of the waveform graph represents time.

[0152] Reference Figure 11 The main processing unit of the main driving circuit 200 or the biometric signal output unit 224 of the main driving circuit 200 guides the right hand pulse wave signal detection process through the application screen. Therefore, the user can place their right hand in contact with the display screen displaying the application screen, where the display device 10 can measure the first pulse wave signal PG1_S. The first pulse wave signal input unit 221 receives the light sensing signal through the light sensing line ERL of the display panel 100 and transmits the first pulse wave signal PG1_S based on the light sensing signal to the first reference correction value setting unit 212.

[0153] First reference correction value setting unit 212 replaces the numerical characteristic information of the first pulse wave signal PG1_S based on the numerical characteristic information of the first reference pulse wave signal, and generates a first reference correction value based on at least one calculation result among a median value, an average value, and a difference value between the numerical characteristic information of the first pulse wave signal PG1_S and the numerical characteristic information of the first reference pulse wave signal.

[0154] Figure 12 1 is an example of a diagram showing a process of setting a reference correction value based on a pulse wave signal detected by a user's left finger. For example, the diagram includes a display device 10 and a separate biometric information detection device OMC including a cuff. In addition, Figure 13 Is shown by Figure 12 An example of a waveform graph of a pulse wave signal detected by a biometric signal measurement device. For example, the y-axis of the waveform graph represents oscillation amplitude, and the x-axis of the waveform graph represents time.

[0155] Reference Figure 12 and Figure 13 , the user uses a separate biometric information detection device OMC (such as a cuff-type blood pressure measurement device) and detects a second reference pulse wave signal of the right arm during a period of generating the second reference correction value.

[0156] After applying pressure to the user's right arm, the biometric information detection device OMC detects a second reference pulse wave signal and analyzes characteristics of the second reference pulse wave signal (such as pulse width f1 and amplitude f2) using a preset program to generate second reference biometric information (such as blood pressure, electrocardiogram, heart rate, etc.). For example, the characteristics of the second reference pulse wave signal (such as pulse width f1 and amplitude f2) may be detected differently from the characteristics of the first reference pulse wave signal (such as pulse width f1 and amplitude f2).

[0157] The biometric information detection device OMC transmits the second reference pulse wave signal and the second reference biometric information to a wireless communication module such as Bluetooth and Wi-Fi, and the main driving circuit 200 receives the second reference pulse wave signal and the second reference biometric information through the wireless communication module and the short-range communication unit 211. In some cases, the biometric information detection device OMC transmits the second reference pulse wave signal and the second reference biometric information directly to the short-range communication unit 211. Figure 14 Is shown by Figure 12 An example of a waveform graph of a detected waveform of a pulse wave signal detected by a display device. For example, the y-axis of the waveform graph represents the PPG signal, and the x-axis of the waveform graph represents time.

[0158] Reference Figure 14 The main processing unit of the main driving circuit 200 or the biometric signal output unit 224 of the main driving circuit 200 guides the left hand pulse wave signal detection process through the application screen. Therefore, the user can place their left hand in contact with the display screen displaying the application screen, where the display device 10 is capable of measuring the second pulse wave signal PG2_S. The second pulse wave signal input unit 222 receives the light sensing signal via the light sensing line ERL of the display panel 100 and transmits the second pulse wave signal PG2_S based on the light sensing signal to the second reference correction value setting unit 213.

[0159] The second reference correction value setting unit 213 replaces the numerical characteristic information of the second pulse wave signal PG2_S based on the numerical characteristic information of the second reference pulse wave signal, and generates a second reference correction value based on at least one calculation result among a median value, an average value, and a difference value between the numerical characteristic information of the second pulse wave signal PG2_S and the numerical characteristic information of the second reference pulse wave signal.

[0160] Figure 15 is an example of a diagram illustrating a measurement process using a plurality of pulse wave signals and biometric information of two thumbs. Figure 16 is an example of a diagram showing an image display screen when a pulse wave signal is detected during a measurement period.

[0161] Reference Figure 15 and Figure 16 The main driving circuit 200 uses the application screen to guide the pulse wave signal detection process, so that when measuring the biometric information of the human body, the first pulse wave signal PG1_S and the second pulse wave signal PG2_S can be detected by two fingers of the left hand and the right hand.

[0162] During a period of detecting biometric information, the main driving circuit 200 supplies data voltages to the first unit pixel PG1 and the second unit pixel PG2 of the display panel 100. In some cases, the main driving circuit 200 supplies control signals to the display scan driver 110 and the light sensing scan driver 120 to display a preset application screen for detecting a biometric signal (e.g., a pulse wave signal) in the display area DA.

[0163] The main driver circuit 200 displays multiple biometric information measurement areas (e.g., the first biometric information measurement area FSA1 and the second biometric information measurement area FSA2) on the application's guidance screen, indicating the touch location of a body part (such as a finger F). In some cases, the waveform of the biometric signal (i.e., pulse wave signals PG1_S and PG2_S) detected in real time is displayed in a display window to guide the entire pulse wave signal detection process. In some cases, for example, the main driver circuit 200 displays the period required for biometric information measurement, the pulse wave signal detection period, and the first biometric information measurement area FSA1 and the second biometric information measurement area FSA2 in the form of a circular or bar graph on the application screen.

[0164] For example, the main driving circuit 200 receives a plurality of touch position coordinates sensed by the touch sensing unit TSU or the pressure sensing unit PSU through the touch driving circuit 400. In some cases, the main driving circuit 200 supplies data voltages to the first and second unit pixels PG1 and PG2 aligned in the plurality of biometric information measurement areas FSA1 and FSA2, respectively, and supplies control signals to the display scan driver 110 and the light sensing scan driver 120. In some cases, the main driving circuit 200 may supply a preset data voltage to at least one of the first and second display pixels SP1 and SP2 of the first and second unit pixels PG1 and PG2. Thus, an optical signal may be detected using at least one of green and red light. The main driving circuit 200 then receives optical signals (e.g., light sensing signals) from the light sensing pixels LSP aligned in the plurality of biometric information measurement areas FSA1 and FSA2, respectively, via the light sensing lines ERL.

[0165] The first and second pulse wave signal input units 221 and 222 of the main driver circuit 200 respectively detect first and second pulse wave signals PG1_S and PG2_S corresponding to the real-time received light sensing signals from each of the biometric information measurement areas FSA1 and FSA2. In some cases, the first and second pulse wave signals PG1_S and PG2_S are digital signal data. Each pulse wave signal corresponds to the magnitude and magnitude variation of the light sensing signal. The main driver circuit 200 displays the real-time detected first and second pulse wave signals PG1_S and PG2_S in a graph format in a display window on the application screen.

[0166] Figure 17 is an example of a waveform diagram showing pulse wave signals detected from different touch positions. Figure 17 The programmed processor 223 of the main driver circuit 200 receives the first pulse wave signal PG1_S and the second pulse wave signal PG2_S in real time via the first pulse wave signal input unit 221 and the second pulse wave signal input unit 222. Characteristics of the first pulse wave signal PG1_S and the second pulse wave signal PG2_S, such as pulse width and amplitude, can be detected as different from each other. In some cases, the first pulse wave signal PG1_S corresponds to a pulse wave signal based on a right finger, and the second pulse wave signal PG2_S corresponds to a pulse wave signal based on a left finger, or vice versa. In some cases, the waveform graph represents the PPG signal as a function of time.

[0167] Figure 18 is an example of a diagram illustrating a method for calculating blood pressure information using a machine learning algorithm according to an embodiment of the inventive concept. Figure 18The programmed processor 223 of the main driving circuit 200 uses a preset machine learning algorithm to analyze the first pulse wave signal PG1_S and the second pulse wave signal PG2_S input in real time based on the pre-stored first reference correction value and the second reference correction value.

[0168] For example, the programming processor 223 compares the characteristic variation information of the first pulse wave signal PG1_S with the characteristic information of the first reference correction value and detects the comparison result. The comparison result is then converted into a database as training data. For example, the programming processor 223 may compare characteristic information such as the pulse width f1 (e.g., systolic and diastolic periods) and digital information of the first reference correction value, the systolic amplitude f2 (e.g., systolic blood pressure value) of the first reference correction value, variation information of the systolic pulse width f3 (e.g., systolic period), and variation information of the diastolic pulse width f4 (e.g., diastolic period) of the first reference correction value with the characteristic information of the first pulse wave signal PG1_S. For example, the characteristic information of the first pulse wave signal PG1_S includes pulse width f1 (e.g., systolic and diastolic periods) and digital information, the amplitude f2 (e.g., systolic blood pressure value) of the systolic period, variation information of the systolic pulse width f3 (e.g., systolic period), and variation information of the diastolic pulse width f4 (e.g., diastolic period) to detect the comparison result. In some cases, the comparison results are stored in a database as training data.

[0169] In some embodiments, the programming processor 223 may use a machine learning algorithm to calculate first biometric information related to blood pressure, heart rate, heart rate variability, respiratory rate, vascular elasticity, cardiovascular disease analysis results, and oxygen saturation based on the magnitude or rate of change in the feature information of the first pulse wave signal PG1_S compared to the feature information of the first reference correction value. In some cases, the programming processor 223 may use a machine learning algorithm to analyze each of the high pulse period and high pulse period variation, high pulse size and variation, low pulse size and variation, high pulse waveform variation, peak period of the high pulse, and the difference in pulse size between the first pulse wave signal PG1_S detected by green light and red light, respectively, compared to the feature information of the first reference correction value. The first biometric information related to blood pressure, heart rate, heart rate variability, respiratory rate, vascular elasticity, cardiovascular disease analysis results, and oxygen saturation based on each analysis result is then obtained.

[0170] In some embodiments, the programmed processor 223 can estimate the blood pressure of the blood vessels in the finger based on the time difference between the time point corresponding to the peak of the first pulse wave signal PG1_S and the time point corresponding to the peak of the filtered pulse wave. For example, the pulse wave signal can be calculated for a preset period of time before and after the time point corresponding to the peak of the first pulse wave signal PG1_S. The difference in the pulse wave signal can thus represent biometric information related to blood pressure. Among the estimated blood pressures, the one with the largest magnitude can be calculated as the systolic blood pressure, and the one with the smallest magnitude can be calculated as the diastolic blood pressure. In some cases, the estimated blood pressure can be used to calculate other blood pressures (such as the average blood pressure).

[0171] Similarly, the programmed processor 223 can use a machine learning algorithm to calculate second biometric information about blood pressure, heart rate, heart rate variation, respiratory rate, vascular elasticity, cardiovascular disease analysis results and oxygen saturation based on the change in the magnitude or rate of the characteristic information of the second pulse wave signal PG2_S compared with the characteristic information of the second reference correction value.

[0172] Thereafter, the biometric signal output unit 224 selects one of the first and second biometric information measured by the programming processor 223, which has an abnormal level (e.g., a high blood pressure level), as the user's real-time biometric information, and displays the selected biometric information on the application screen. For example, the biometric signal output unit 224 may generate digital video data corresponding to the touch coordinates based on the touch coordinate data, or may execute an application indicated by an icon displayed at the user's touch coordinates.

[0173] In some cases, a machine learning model is used to execute a machine learning algorithm. For example, a machine learning model is designed to recognize patterns, make predictions, or perform a specific task (e.g., generate biometric information) without being explicitly programmed. In some cases, a machine learning model includes multiple artificial neural networks (ANNs) trained to generate predicted biometric information based on input signals. For further details about machine learning models, see Figure 12 Provide a description.

[0174] In some cases, the first neural network layer of a machine learning model is trained to receive input data (e.g., Figure 17 In some cases, the extracted features include pulse width f1, systolic cycle amplitude f2, systolic pulse width f3, and diastolic pulse width f4. In some cases, each of the extracted features can be represented as a vector.

[0175] The output of the first neural network layer is then provided to the intermediate neural network layer of the machine learning model for analysis and calculation. The output of the intermediate neural network layer is then provided to the final neural network layer of the machine learning model to generate predicted biometric information (e.g., output blood pressure).

[0176] Figure 19 : is an example of a graph illustrating a method for calculating information about heart rate and respiration among biometric information according to an embodiment. For example, the y-axis of the graph represents a PPG signal, and the x-axis of the graph represents time.

[0177] Reference Figure 19 The main driving circuit 200 samples the first pulse wave signal PG1_S during preset sampling periods before and after the time point corresponding to the peak of the first pulse wave signal PG1_S, and detects a high pulse generation period (heart rate cycle) HT of the sampled first pulse wave signal PG1_S. In some cases, biometric information regarding the heart rate cycle and heart rate (HR) can be detected by counting the number of high pulses occurring per a preset reference period (e.g., 60 seconds) of the sampled first pulse wave signal PG1_S.

[0178] For example, the main driving circuit 200 detects the heart rate cycle HT and the heart rate cycle variations t1 to t4 of the high pulses of each preset reference period for the peak of the pulse wave signal to detect heart rate variability (HRV) based on the heart rate cycle variation rate.

[0179] In some cases, the main driver circuit 200 sequentially detects the generation cycle and magnitude of the low pulses of the sampled first pulse wave signal PG1_S. The main driver circuit 200 can then detect the change cycle of the magnitude dcs of the low pulses in units of a preset reference period (e.g., 60 seconds) to detect changes in the user's respiration and respiratory rate (RR). For example, the main driver circuit 200 can analyze the periods in which the magnitude dcs of the low pulses increases and the periods in which the magnitude dcs of the low pulses decrease to detect changes in the user's respiration and respiratory rate (RR).

[0180] Figure 20 1 is an example of a graph illustrating a method for calculating information about vascular elasticity among biometric information according to an embodiment. For example, the graph represents a PPG signal as a function of time. Figure 20 The main driving circuit 200 can set and obtain blood vessel elasticity (BVE) by amplifying and analyzing the high pulse variation of the sampled first pulse wave signal PG1_S.

[0181] When blood flow increases due to heartbeats, the pulse wave signal changes to a high pulse form. In some cases, when blood flow decreases, the pulse wave signal changes to a low pulse form. If blood flow rapidly changes due to the shape of a blood vessel during periods of increasing or decreasing blood flow, the change in blood flow may quickly relax or slow down due to the elasticity of the vessel. Therefore, the main driver circuit 200 amplifies and analyzes the high pulse variation of the first pulse wave signal PG1_S and sets and obtains the BVE using a value corresponding to the magnitude of the high pulse variation.

[0182] Figure 21 is an example of a graph illustrating a method for calculating information about cardiovascular disease among biometric information according to an embodiment. In some cases, the y-axis of the graph may represent a PPG signal, and the x-axis of the graph may represent time.

[0183] Reference Figure 21 The main driver circuit 200 can set and obtain a cardiovascular disease assessment score (or cardiovascular health analysis result score) by differentiating, amplifying, and analyzing the high-pulse variation pattern of the sampled first pulse wave signal PG1_S. For example, the main driver circuit 200 detects the period (peak time) during which the first pulse wave signal PG1_S reaches its peak value PK as a high-pulse signal, and the time change ΔT during which the first pulse wave signal PG1_S decreases compared to the period (peak time) during which the first pulse wave signal PG1_S reaches its peak value PK. As the period (peak time) during which the first pulse wave signal PG1_S reaches its peak value PK as a high-pulse signal increases, the risk of heart disease increases. Therefore, the main driver circuit 200 can set and obtain a cardiovascular disease assessment score (or cardiovascular health analysis result score) inversely proportional to the period (peak time) during which the first pulse wave signal PG1_S reaches its peak value PK as a high-pulse signal.

[0184] Figure 22 is an example of a graph illustrating a method for calculating information about oxygen saturation among biometric information according to an embodiment. In some cases, the graph represents absorption rate as a function of time.

[0185] Reference Figure 22 When the heart contracts, red blood cells carry more oxygenated hemoglobin to peripheral tissues. On the other hand, when the heart relaxes, it receives some blood from peripheral tissues. Therefore, the main driver circuit 200 uses the magnitude changes of the first pulse wave signal PG1_S detected by green light to detect the deoxyhemoglobin (Hb) level, and uses the magnitude changes of the first pulse wave signal PG1_S detected by red light to detect the HbO2 (oxyhemoglobin) level.

[0186] The main driving circuit 200 may detect the oxygen saturation (SpO2) using the following equation (2).

[0187] (2) Here, HbO2 represents oxygenated hemoglobin, and Hb represents deoxygenated hemoglobin.

[0188] Therefore, the main driving circuit 200 can display biometric information such as blood pressure (BP), heart rate (HR), heart rate variability (HRV), respiratory rate (RR), vascular elasticity (BVE), cardiovascular disease (or cardiovascular health analysis result score), oxygen saturation (SpO2), etc. on the application screen.

[0189] Although the embodiments of the present disclosure have been described with reference to the accompanying drawings, the present disclosure is not necessarily limited to the embodiments described above. For example, those skilled in the art will appreciate that many variations and modifications may be made to the preferred embodiments without departing substantially from the principles of the present disclosure. Therefore, the disclosed preferred embodiments are used in a general and descriptive sense, not for purposes of limitation.

Claims

1. A display device, comprising: a display panel comprising display pixels and light sensing pixels arranged in a display area of ​​the display panel; a display scan driver configured to drive the display pixels to emit light; a light sensing scanning driver configured to drive the light sensing pixels to sense light; as well as The main driving circuit is configured to perform the following operations, including: obtaining a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal, and a second pulse wave signal using a biometric information detection device; generating a first reference correction value and a second reference correction value based on the first reference pulse wave signal and the second reference pulse wave signal, respectively; and generating biometric information based on the first pulse wave signal, the second pulse wave signal, the first reference correction value, and the second reference correction value.

2. The display device according to claim 1, wherein The main driving circuit is further configured to perform the following operations, including: obtaining the first reference pulse wave signal through the left arm, and obtaining the first pulse wave signal through the right finger; obtaining the second reference pulse wave signal through the right arm, and obtaining the second pulse wave signal through the left finger; generating the first reference correction value for the right finger based on an average value or a difference between the first pulse wave signal and the first reference pulse wave signal; and The second reference correction value with respect to the left finger is generated based on an average value or a difference value between the second pulse wave signal and the second reference pulse wave signal.

3. The display device according to claim 2, wherein: The main driving circuit is further configured to perform the following operations, including: using an application screen to guide the detection process of the first pulse wave signal and the second pulse wave signal; generating first biometric information based on the first pulse wave signal and the first reference correction value using a machine learning algorithm; generating second biometric information based on the second pulse wave signal and the second reference correction value using the machine learning algorithm; generating a final measurement result based on the first biometric information and the second biometric information; and The final measurement result is displayed on the application screen.

4. The display device according to claim 3, wherein The main driving circuit is further configured to perform the following operations, including: calculating first numerical feature information based on the first reference pulse wave signal; calculating second numerical feature information based on the second reference pulse wave signal; generating the first reference correction value based on an average value, a difference value, or a median value between the first numerical feature information and the numerical feature information of the first pulse wave signal; and The second reference correction value is generated based on an average value, a difference value, or a median value between the second numerical feature information and the numerical feature information of the second pulse wave signal.

5. The display device according to claim 3, wherein The main driving circuit is further configured to perform the following operations, including: obtaining a third reference pulse wave signal and a third pulse wave signal; generating a first average reference correction value based on the first reference pulse wave signal, the first pulse wave signal, the third reference pulse wave signal, and the third pulse wave signal, wherein the first reference correction value is generated based on the first average reference correction value; obtaining a fourth reference pulse wave signal and a fourth pulse wave signal; A second average reference correction value is generated based on the second reference pulse wave signal, the second pulse wave signal, the fourth reference pulse wave signal, and the fourth pulse wave signal, wherein the second reference correction value is generated based on the second average reference correction value. The display device according to claim 2 , wherein: The main driving circuit further includes: a short-range communication unit configured to receive the first reference pulse wave signal and the second reference pulse wave signal; a first pulse wave signal input unit configured to receive the first pulse wave signal of the right finger; a second pulse wave signal input unit configured to receive the second pulse wave signal of the left finger; a first reference correction value setting unit, configured to generate the first reference correction value; a second reference correction value setting unit configured to generate the second reference correction value; and The reference correction value storage unit is configured to store the first reference correction value and the second reference correction value.

7. The display device according to claim 6, wherein: The first reference correction value setting unit generates first numerical characteristic information based on the first reference pulse wave signal, wherein the first numerical characteristic information includes amplitude and pulse width range, systolic period and diastolic period, systolic blood pressure variation width range, and systolic period and diastolic period variation range; and The first reference correction value setting unit generates the first reference correction value based on an average value, a difference value, or a median value between the numerical characteristic information of the first pulse wave signal and the first numerical characteristic information.

8. The display device according to claim 6, wherein: The second reference correction value setting unit generates second numerical characteristic information based on the second reference pulse wave signal, wherein the second numerical characteristic information includes amplitude and pulse width range, systolic period and diastolic period, systolic blood pressure variation width range, and systolic period and diastolic period variation range; and The second reference correction value setting unit generates the second reference correction value based on an average value, a difference value, or a median value between the numerical characteristic information of the second pulse wave signal and the second numerical characteristic information.

9. The display device according to claim 6, wherein: The main driving circuit further includes: a programmed processor configured to generate first and second biometric information in real time based on the first and second pulse wave signals, respectively, during a measurement period, and configured to analyze the first and second biometric information based on the first and second reference correction values ​​using a preset machine learning algorithm; and a biometric signal output unit configured to generate a final measurement result based on the first biometric information and the second biometric information, and configured to display the final measurement result on an application screen, wherein the programmed processor is configured to generate the first biometric information by analyzing the first pulse wave signal based on the first reference correction value using a machine learning algorithm, and The biometric signal output unit is configured to generate the final measurement result based on the first biometric information and the second biometric information.

10. A display device, comprising: a display panel comprising display pixels and light sensing pixels arranged in a display area of ​​the display panel; a display scan driver configured to drive the display pixels to emit light; a light sensing scanning driver configured to drive the light sensing pixels to sense light; as well as The main driving circuit is configured to perform the following operations, including: obtaining a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal, and a second pulse wave signal using a biometric information detection device; generating a first reference correction value and a second reference correction value based on the first reference pulse wave signal and the second reference pulse wave signal, respectively; and generating biometric information based on the first pulse wave signal, the second pulse wave signal, the first reference correction value, and the second reference correction value. The main driving circuit guides the biometric signal detection process by displaying an application screen, generating a biometric signal based on the first pulse wave signal and the second pulse wave signal, generating a final measurement result based on the biometric signal, and displaying the final measurement result on the application screen.

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