Display panel, display device and vital sign monitoring method

Abstract

The invention provides a display panel, a display device and a vital sign monitoring method, the display panel comprises an array substrate, a color film substrate and a millimeter wave radar antenna array located between the color film substrate and the array substrate, and the millimeter wave radar antenna array is at least partially located in a black matrix area of the color film substrate; the millimeter wave radar antenna array is electrically connected with the radar circuit through a conductive connection structure arranged in a frame of the display panel, and is used for transmitting millimeter wave signals under the control of the radar circuit and receiving millimeter wave echo signals reflected by a user in a detection area of the millimeter wave radar antenna array, the millimeter wave echo signals are used for determining vital sign parameters of the user. Therefore, the display panel is integrated with a non-contact vital sign monitoring function under the condition that an additional independent radar module and a windowing structure are not needed, and the integration level and the light weight level of the whole machine are improved while the display effect is kept.

Description

Technical Field

[0001] This invention belongs to the field of display panel technology, and particularly relates to a display panel, display device, and method for monitoring vital signs. Background Technology

[0002] Display devices with vital sign monitoring functions are gradually being used because they can acquire vital sign information such as heart rate and respiration while displaying content, which helps to improve the intelligence level of smart homes, in-vehicle electronics and medical auxiliary equipment.

[0003] In existing technologies, on the one hand, contact-based photoplethysmography (PPG) and capacitive sensing solutions require direct contact between the user's body and the sensing area, resulting in complex structural layouts and susceptibility to ambient light and skin conditions, leading to poor monitoring stability. On the other hand, non-contact solutions often employ separate millimeter-wave radar modules and display panels. To ensure the radiation performance of the radar antenna, the module is typically installed outside the display panel with additional installation and wiring space reserved. However, this increases the overall size of the device, complicates the structure and manufacturing process, and raises costs. Furthermore, it is difficult to match the radar antenna with the display area, making it challenging to achieve stable non-contact monitoring of users in front of the screen while ensuring display quality. Summary of the Invention

[0004] The purpose of this invention is to provide a display panel, a display device, and a method for monitoring vital signs, aiming to solve the problem that existing display devices cannot achieve stable non-contact monitoring of vital signs while ensuring display quality.

[0005] A first aspect of the present invention provides a display panel, the display panel including an array substrate, a color filter substrate, and a millimeter-wave radar antenna array located between the color filter substrate and the array substrate, wherein the millimeter-wave radar antenna array is at least partially located in the black matrix region of the color filter substrate; A millimeter-wave radar antenna array is electrically connected to a radar circuit via a conductive connection structure. It is used to transmit millimeter-wave signals under the control of the radar circuit and to receive millimeter-wave echo signals reflected back by a user within the detection area of ​​the millimeter-wave radar antenna array. The millimeter-wave echo signals are used to determine the user's vital signs parameters. The conductive connection structure is disposed in the bezel of the display panel. Optionally, the millimeter-wave radar antenna array includes at least one transmitting antenna array and one receiving antenna array. The transmitting antenna array and the receiving antenna array are respectively located in the black matrix areas on opposite sides of the display area of ​​the display panel, for forming a millimeter-wave transceiver link across the display area. The millimeter-wave transceiver link is used to transmit the millimeter-wave signal and to receive the millimeter-wave echo signal.

[0006] Optionally, the transmitting antenna array and / or the receiving antenna array includes a common feed line extending along a predetermined direction and a plurality of radiating elements electrically connected to the common feed line. The plurality of radiating elements extend from one or both sides of the common feed line at intervals and are arranged in a comb-like manner. Each of the radiating elements constitutes an independent radiating element for transmitting millimeter-wave signals or receiving millimeter-wave echo signals.

[0007] Optionally, the plurality of radiating elements have at least two different widths in the width direction, so that radiating elements of different widths correspond to different transmission frequency bands, so as to cover the predetermined operating frequency band; In this configuration, at least a portion of the radiating elements in the transmitting antenna array are configured to collaboratively transmit millimeter-wave signals to form a synthetic beam pointing toward the detection area.

[0008] Optionally, the millimeter-wave radar antenna array includes multiple antenna subarrays arranged on the four sides around the display area. The multiple antenna subarrays respectively include a first antenna subarray and a second antenna subarray arranged opposite each other along a first direction, and / or a third antenna subarray and a fourth antenna subarray arranged opposite each other along a second direction. The first direction is perpendicular to the second direction. One of the first antenna subarray and the second antenna subarray serves as a transmitting antenna and the other as a receiving antenna. One of the third antenna subarray and the fourth antenna subarray serves as a transmitting antenna and the other as a receiving antenna.

[0009] A second aspect of the present invention provides a display device, the display device comprising: The display panel as described in the first aspect above; A circuit board is disposed on one side of the array substrate; A radar circuit, mounted on the circuit board, includes a radio frequency front-end assembly and a radar control circuit. The radar control circuit is electrically connected to the millimeter-wave radar antenna array via the conductive connection structure. It controls the millimeter-wave radar antenna array to transmit millimeter-wave signals and receive millimeter-wave echo signals reflected back by a user within the detection area of ​​the millimeter-wave radar antenna array. It also processes the received millimeter-wave echo signals to obtain the user's vital signs parameters. The radio frequency front-end assembly is used to perform frequency conversion and / or signal amplification processing on the millimeter-wave signals and / or the millimeter-wave echo signals.

[0010] Optionally, the display device further includes a display driving circuit and a timing control circuit; The timing control circuit is used to divide the display time period of the display image and the radar working time period of the millimeter-wave radar antenna array within the display frame period. The display driving circuit is used to drive the display panel to display images during the display period; The radar control circuit is specifically used to control the radio frequency front-end circuit to drive the millimeter-wave radar antenna array to transmit millimeter-wave signals during a radar working period of one display frame period, and to receive millimeter-wave echo signals reflected by the user's body through the millimeter-wave radar antenna array. The display period occupies a first percentage of the display frame period, and the radar operating period occupies a second percentage of the display frame period, wherein the first percentage is greater than the second percentage.

[0011] Optionally, the conductive connection structure is conductive silver paste located in the bezel of the display panel.

[0012] Optionally, the display device includes an attitude sensor for detecting the orientation of the display device; The radar control circuit is configured to: select a first part of the millimeter-wave radar antenna array that is in a horizontal position as a transmitting antenna, based on the orientation detected by the attitude sensor, and select a second part that is in a horizontal position and arranged opposite to the first part as a receiving antenna.

[0013] Optionally, the display device further includes a signal processing circuit disposed on the circuit board, the signal processing circuit being used to acquire the millimeter-wave signal echo received by the millimeter-wave radar antenna array through a conductive connection structure disposed in the bezel of the display panel; the signal processing circuit being used to analyze and process the millimeter-wave signal echo to obtain the user's vital signs parameters. The display device further includes an artificial intelligence processing unit, which is electrically connected to the signal processing circuit and is used to analyze whether the user's physiological state is abnormal based on the user's historical monitoring data and vital sign parameters.

[0014] A third aspect of this invention provides a method for monitoring vital signs, the method being applied to a display device as described in the second aspect, the method comprising: During a radar operating period of one display frame cycle, the radar control circuit controls the radio frequency front-end circuit to drive the millimeter-wave radar antenna array to transmit millimeter-wave signals and receive millimeter-wave echo signals reflected by the user's body through the millimeter-wave radar antenna array. The signal processing circuit performs signal processing on the millimeter-wave echo signal to obtain the user's vital signs parameters, and inputs the vital signs parameters into the artificial intelligence processing unit; The artificial intelligence processing unit performs trend analysis on the vital sign parameters to obtain predicted vital sign values, and determines whether the vital sign parameters are abnormal based on the predicted vital sign values. When the vital signs parameters are abnormal, the display driving circuit displays a prompt interface on the display device and / or sends a warning message to the terminal through the display device.

[0015] The beneficial effects of this invention compared to existing technologies are as follows: The aforementioned display panel includes an array substrate, a color filter substrate, and a millimeter-wave radar antenna array located between the color filter substrate and the array substrate. The millimeter-wave radar antenna array is at least partially located in the black matrix area of ​​the color filter substrate. The millimeter-wave radar antenna array is electrically connected to a radar circuit through a conductive connection structure disposed in the bezel of the display panel. It is used to transmit millimeter-wave signals under the control of the radar circuit and to receive millimeter-wave echo signals reflected back by a user within the detection area of ​​the millimeter-wave radar antenna array. The millimeter-wave echo signal is used to determine the user's vital signs parameters. Without occupying the effective light-emitting area or damaging the optical uniformity of the color filter layer, a detection area covering the user's target outline is formed in front of the display panel, and the transmission and echo reception of millimeter-wave signals are completed. Thus, without the need for an additional independent radar module and window structure, the display panel itself can integrate non-contact vital sign monitoring functions. While maintaining the display effect, it improves the integration and lightweight level of the entire device and facilitates stable monitoring of the vital signs of the user in front of the screen. Attached Figure Description

[0016] Figure 1 A cross-sectional structural diagram of the display panel provided in an embodiment of this application; Figure 2 This is a schematic diagram of the color filter-side antenna array arrangement provided in an embodiment of this application; Figure 3 This is a schematic diagram of the comb antenna element structure provided in the embodiments of this application; Figure 4 This is a schematic diagram of a millimeter-wave radar comb antenna array arranged on four sides of a display panel according to an embodiment of this application; Figure 5 This is a schematic diagram illustrating the principle of vital sign monitoring provided in an embodiment of this application. Figure 6 A block diagram of a display device provided in an embodiment of this application; Figure 7 This is a schematic diagram of the horizontal placement of the display device provided in the embodiments of this application; Figure 8 This is a schematic diagram of the vertical placement of the display device provided in the embodiments of this application; Figure 9A flowchart illustrating a vital signs monitoring method provided in this application embodiment; Figure 10 This is a schematic diagram of the abnormal early warning processing flow for vital sign monitoring provided in the embodiments of this application. Detailed Implementation

[0017] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0019] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example 1 A first aspect of this application provides a display panel for displaying vital sign monitoring results. In this embodiment, the display panel can be a liquid crystal display panel.

[0022] In this embodiment, the display panel includes an array substrate, a color filter substrate, and a millimeter-wave radar antenna array located between the color filter substrate and the array substrate. The millimeter-wave radar antenna array is at least partially located in the black matrix region of the color filter substrate. The millimeter-wave radar antenna array is electrically connected to the radar circuit via a conductive connection structure. It is used to transmit millimeter-wave signals under the control of the radar circuit and to receive millimeter-wave echo signals reflected back by users within the detection area of ​​the millimeter-wave radar antenna array. The millimeter-wave echo signal is used to determine the user's vital signs parameters. The conductive connection structure is set in the bezel of the display panel.

[0023] Specifically, the specific structures of the array substrate, color filter substrate, and millimeter-wave radar antenna array in the aforementioned display panel are as follows: An array substrate includes a first substrate and a pixel array layer stacked on the first substrate. The first substrate includes a display area and a non-display area surrounding the display area, and the pixel array layer is disposed in the display area. The color filter substrate includes a second substrate and a color filter layer stacked on the second substrate. The color filter layer includes color filter regions corresponding one-to-one with multiple pixel units of the pixel array layer, and black matrix regions located between adjacent color filter regions. A millimeter-wave radar antenna array, stacked on a second substrate, is at least partially located in the black matrix area. It is used to form a detection area in front of the display panel that covers the outline of the user target, and to transmit and receive millimeter-wave signals when electrically connected to the radar circuit, so as to perform non-contact monitoring of the vital signs of the user in the detection area. The millimeter-wave radar antenna array is electrically connected to the radar circuit through a conductive connection structure set on the bezel of the display panel.

[0024] The following is combined Figure 1 The structure of the above-mentioned display panel will be further explained.

[0025] like Figure 1 As shown, the array substrate includes a first substrate and a pixel array layer stacked on the first substrate. Figure 1 The thin-film transistor glass substrate (TFT Glass) at the bottom center is the first substrate, on which thin-film transistor structures and pixel electrodes electrically connected to the thin-film transistors are formed, together constituting the pixel array layer. The first substrate is divided along the panel plane into a central display area and a non-display area surrounding the display area. Figure 1 The central area, where no sealing material (Seal) is applied, corresponds to the display area of ​​the first substrate. Figure 1 The edge area on the right side, which is covered with sealing material Seal and conductive silver paste, corresponds to the non-display area of ​​the first substrate. The pixel array layer is disposed within the display area to form multiple pixel units arranged in an array.

[0026] The color filter substrate includes a second substrate and a color filter layer stacked on the second substrate. Figure 1The uppermost color filter glass substrate (CF Glass) is the second substrate, and a color filter layer is formed on its side facing the liquid crystal. The color filter layer includes color filter areas located at the corresponding positions of the RGB pixels in the panel plane direction, and black matrix areas located between adjacent color filter areas. Figure 1 The area marked "BM" (Black Matrix) is the Black Matrix area.

[0027] The millimeter-wave radar antenna array is stacked on the second substrate, at least partially located in the position corresponding to the black matrix region. For example... Figure 1 As shown on the right, the millimeter-wave radar antenna is located on the side of the second substrate near the color filter layer, overlapping the black matrix BM region in the thickness direction. It is used to form a detection area covering the outline of the user target in front of the display panel. When electrically connected to the external radar circuit, it transmits and receives millimeter-wave signals through the millimeter-wave radar antenna array to perform non-contact monitoring of the vital signs of the user in the detection area.

[0028] The conductive connection structure is disposed on the border portion within the non-display area of ​​the first substrate. For example... Figure 1 As shown, a sealing structure is formed on the right edge of the array substrate and the color filter substrate, and a conductive connection structure is provided inside the sealing structure. The structure marked as "conductive silver paste" in the figure is a specific form of the conductive connection structure. One end of the conductive silver paste is electrically connected to the millimeter-wave radar antenna array on the color filter side, and the other end is led out towards the array substrate and connected to the radar circuit pad, thereby realizing the electrical connection between the millimeter-wave radar antenna array and the radar circuit in the non-display area of ​​the first substrate and the second substrate.

[0029] In the figure, the area in the middle without the sealing material Seal corresponds to the display area of ​​the first substrate and the second substrate; the area on the right side of the figure with the sealing material Seal and conductive silver paste corresponds to the non-display area of ​​the first substrate and the second substrate, and a conductive connection structure is formed in the non-display area and electrically connected to the millimeter-wave radar antenna array.

[0030] The above-described portion corresponds to the basic structure of the display panel of this application. Based on this basic structure, this embodiment may further include... Figure 1 The various labeled structures shown form a complete display panel. Specifically: Figure 1 An upper polarizer is disposed on the outer side of the second substrate. The upper polarizer is located on the side of the color filter substrate away from the liquid crystal layer and is used to adjust the polarization state of the emitted light to meet the optical requirements of the liquid crystal display. An overcoat (OC) layer is disposed between the second substrate and the liquid crystal layer. The overcoat layer is used to planarize the surface of the color filter and protect the color filter layer.

[0031] The space between the first substrate and the second substrate is filled with a liquid crystal layer. Figure 1 The area marked "liquid crystal" is the liquid crystal layer. Transparent electrodes electrically connected to the pixel array layer are located on both sides of the liquid crystal layer. The structure marked "transparent electrode" in the figure corresponds to the electrode layer facing the liquid crystal layer and is used to change the orientation of the liquid crystal molecules under the action of a driving voltage, thereby modulating the intensity of transmitted light to achieve image display.

[0032] A lower polarizer is disposed on the outer side of the first substrate. The lower polarizer is located on the side of the array substrate away from the liquid crystal layer. Together with the upper polarizer, it forms the polarization optical system required for liquid crystal display, which is used to realize the polarization control of transmitted light.

[0033] A sealing material is provided between the non-display areas of the first substrate and the second substrate. Figure 1 The structure marked "Seal" is the sealing material, used to encapsulate the liquid crystal layer and fix the relative positions of the array substrate and the color filter substrate. Conductive silver paste is formed within the sealing material area. The conductive silver paste serves both as an electrical connector and, together with the sealing material, achieves edge encapsulation.

[0034] In an optional embodiment, the conductive connection structure is conductive silver paste located in the bezel of the display panel.

[0035] Figure 1 The conductor pattern labeled "millimeter-wave radar antenna" corresponds to a part of the millimeter-wave radar antenna array. In specific implementations, the millimeter-wave radar antenna array can be formed by arranging multiple comb-shaped antenna elements in the black matrix BM area to meet the requirements of millimeter-wave radiation performance and frequency band coverage. For its specific structure, please refer to the following figures and further explanations in related embodiments.

[0036] Regarding the specific materials used to implement the antenna, in one optional embodiment, multiple comb-shaped antenna elements can be fabricated from transparent conductive oxide ITO (Indium Tin Oxide) or silver nanowires, and the manufacturing process can be achieved using processes such as film coating.

[0037] In an optional embodiment, in order to form a stable millimeter-wave transceiver channel covering the entire display area in front of the display panel without occupying the effective light-emitting area, the millimeter-wave radar antenna array is configured as at least one transmitting antenna array and one receiving antenna array. The transmitting antenna array and the receiving antenna array are respectively located in the black matrix areas on opposite sides of the display area, for forming a millimeter-wave transceiver link across the display area, wherein the millimeter-wave transceiver link is used to transmit millimeter-wave signals and to receive millimeter-wave echo signals.

[0038] See Figure 2This illustration shows a schematic diagram of the color filter-side antenna array arrangement provided in an embodiment of this application. The display area of ​​the display panel is provided with RGB pixels arranged in a row and column array, with adjacent RGB pixels forming corresponding black matrix areas. Millimeter-wave radar comb antennas 11 are continuously arranged in several columns of black matrix areas near the left edge of the display area, forming a transmitting antenna array. Millimeter-wave radar comb antennas 12 are continuously arranged in several columns of black matrix areas near the right edge of the display area, forming a receiving antenna array. The transmitting and receiving antenna arrays extend vertically along the display area and are arranged close to the CF (Color Filter) boundaries on the left and right sides of the display area, respectively, so that the two arrays are positioned opposite each other within the panel plane. During operation, the transmitting antenna array transmits millimeter-wave signals to the front of the display panel, and the receiving antenna array receives millimeter-wave echoes reflected back from the user's body, thereby establishing a millimeter-wave transceiver link spanning the entire display area between the two sides of the display area.

[0039] In the above optional embodiments, in order to enable the millimeter-wave radar antenna to transmit signals of different frequencies to achieve wideband coverage and meet the signal bandwidth requirements of vital signs, the millimeter-wave radar antenna can be designed as a comb antenna.

[0040] Specifically, the transmitting antenna array and / or receiving antenna array includes a common feed line extending along a predetermined direction and multiple radiating elements electrically connected to the common feed line. The multiple radiating elements extend from one or both sides of the common feed line at intervals and are arranged in a comb-like manner. Each radiating element constitutes an independent radiating element for transmitting millimeter-wave signals or receiving millimeter-wave echo signals.

[0041] See Figure 3 The diagram shows a schematic of the comb antenna unit structure provided in an embodiment of this application. Figure 3 In the image, the black matrix area represents a single comb-shaped antenna element, with a long side dimension of L2 and a short side dimension of W2. A common feed line extends from the feed end at the bottom along a predetermined direction (e.g., perpendicular to the upper edge of the display area). Multiple transverse conductive arms are sequentially extended from one side of this common feed line at predetermined intervals. The length of each transverse conductive arm is shown as L1, and its width as W1. Each transverse conductive arm is electrically connected to the common feed line and arranged parallel to each other, thus forming a comb-like conductor pattern on the plane. The common feed line and its connected transverse conductive arms together constitute multiple radiating elements. Each transverse conductive arm and its corresponding feed line segment constitute an independent transmitting or receiving radiating element. Several such elements can be repeatedly arranged along the direction of the common feed line in an antenna array. Figure 3 The comb-shaped antenna element shown is used to realize array transmission and reception of millimeter-wave signals.

[0042] Furthermore, in an optional embodiment, in order to achieve wideband coverage within a predetermined operating frequency band, the multiple radiating elements in the comb antenna element are designed with at least two different widths in the width direction. Specifically, as... Figure 3 As shown, the transverse conductive arms arranged along the extension direction of the common feed line can be divided into a first type and a second type. The linewidth of the first type of radiating element is a first width, and the linewidth of the second type of radiating element is a second width. The first width and the second width are different. Utilizing the radiation characteristics of the microstrip antenna, radiating elements of different widths correspond to different resonant frequency bands, enabling multiple radiating elements within the same comb antenna element to operate in different transmission frequency bands. These multiple frequency bands are spaced apart or partially overlap in the spectrum to cover the predetermined operating frequency band used for vital sign monitoring.

[0043] For example, the millimeter-wave radar antenna array is used to operate in the 60GHz millimeter-wave frequency band, and without affecting the performance of the millimeter-wave radar antenna array, the size of W1 and L1 can be made at the micrometer level, and the size of W2 and L2 can be made within 10 millimeters, which meets the size requirements of the BM width in the display panel.

[0044] In the transmitting antenna array, at least a portion of the aforementioned radiating elements can be selected as a transmitting element group. A synchronous excitation signal is applied to the transmitting element group by the radar control circuit, causing these radiating elements to collaboratively transmit millimeter-wave signals under a predetermined phase relationship. The excitation amplitude and phase of each radiating element are controlled through a common feed line and / or an external power supply network, causing these radiating elements to form a synthetic wavefront pointing towards the detection area in the space in front of the display panel. This creates a synthetic beam at a predetermined position in front of the panel for subsequent vital sign detection.

[0045] Furthermore, in practical applications, the display panel needs to be rotated 90° to allow for both horizontal and vertical display. However, existing technologies only design millimeter-wave radar antennas at both ends of the horizontally positioned display panel, which limits its application scenarios. Therefore, this application proposes a corresponding optimization solution: millimeter-wave radar antennas can be designed on all four sides of the display panel.

[0046] Specifically, the millimeter-wave radar antenna array includes multiple antenna subarrays arranged on the four sides around the display area. The multiple antenna subarrays include a first antenna subarray and a second antenna subarray arranged opposite each other along a first direction, and / or a third antenna subarray and a fourth antenna subarray arranged opposite each other along a second direction. The first direction is perpendicular to the second direction. One of the first antenna subarray and the second antenna subarray serves as a transmitting antenna and the other as a receiving antenna. One of the third antenna subarray and the fourth antenna subarray serves as a transmitting antenna and the other as a receiving antenna.

[0047] See Figure 4This illustration shows a schematic diagram of a millimeter-wave radar comb antenna array arranged on all four sides of a display panel according to an embodiment of this application. RGB pixels are arranged in rows and columns within the display area, with a black matrix area between adjacent RGB pixels. Millimeter-wave radar comb antennas 11 are arranged in one or more columns of black matrix area near the left side of the display area, millimeter-wave radar comb antennas 12 are arranged in one or more columns of black matrix area near the right side of the display area, millimeter-wave radar comb antennas 14 are arranged near the CF boundary at the upper edge of the display area, and millimeter-wave radar comb antennas 13 are arranged near the TFT (Thin Film Transistor) boundary at the lower edge of the display area. The comb antennas 11-14 respectively constitute multiple antenna sub-arrays extending along the left, right, upper, and lower sides of the display area. Each antenna array is located within the corresponding black matrix area and does not occupy the effective light-emitting area. During operation, any pair of oppositely arranged antenna subarrays (e.g., left / right or top / bottom) can be selected as the transmitting antenna array and the receiving antenna array to form a millimeter-wave transceiver link across the display area in the current placement posture, thereby enabling stable non-contact vital sign monitoring when the display panel is placed horizontally or vertically.

[0048] The beneficial effects of this application embodiment compared with the prior art are as follows: The display panel includes an array substrate, a color filter substrate, and a millimeter-wave radar antenna array located between the color filter substrate and the array substrate. The millimeter-wave radar antenna array is at least partially located in the black matrix area of ​​the color filter substrate. The millimeter-wave radar antenna array is electrically connected to the radar circuit through a conductive connection structure disposed on the bezel of the display panel. It is used to transmit millimeter-wave signals under the control of the radar circuit and to receive millimeter-wave echo signals reflected back by the user within the detection area of ​​the millimeter-wave radar antenna array. The millimeter-wave echo signal is used to determine the user's vital signs parameters. Without occupying the effective light-emitting area or damaging the optical uniformity of the color filter layer, a detection area covering the user's target outline is formed in front of the display panel, and the transmission and echo reception of millimeter-wave signals are completed. Thus, without the need for an additional independent radar module and window structure, the display panel itself can integrate non-contact vital sign monitoring function. While maintaining the display effect, it improves the integration and weight reduction of the whole device and is conducive to achieving stable monitoring of the vital signs of the user in front of the screen.

[0049] Example 2 A second aspect of this application provides a display device for monitoring vital signs.

[0050] In this embodiment, the display device can use the display panel of Embodiment 1 as the display module. By configuring radar circuits and related control circuits on the back side of the display panel, the display device can achieve normal image display while having a non-contact vital sign monitoring function.

[0051] like Figure 5 As shown, the display device provided in this embodiment is positioned in front of the user, who sits at a predetermined distance from the front of the display device. The front of the display device is the display panel of Embodiment 1, which integrates a millimeter-wave radar antenna array. A circuit board is provided on the back of the display device for mounting radar circuitry and display driving-related circuitry. The millimeter-wave radar antenna array is electrically connected to the radar circuitry on the circuit board via a conductive connection structure. The radio frequency front-end component drives the transmitting antenna unit to transmit millimeter-wave signals toward the user via a power amplifier module PA (Power Amplifier). The echo signals reflected by the user's chest and other parts are received by the receiving antenna unit and amplified by a low-noise amplifier module LNA (Low Noise Amplifier). After processing by a phase shift unit and a mixer / demodulation unit, a baseband signal related to minute human body displacements is obtained and then sent to the signal processing circuit for vital sign signal extraction. The radar control circuit is used to control the transmission, reception, and signal processing processes.

[0052] Specifically, the display device in this embodiment includes: a display panel, a circuit board, and a radar circuit as included in any optional embodiment in Embodiment 1; A circuit board is disposed on one side of the array substrate; The radar circuit, mounted on the circuit board, includes an RF front-end assembly and a radar control circuit. The radar control circuit is electrically connected to the millimeter-wave radar antenna array through a conductive connection structure. It is used to control the millimeter-wave radar antenna array to transmit millimeter-wave signals and receive millimeter-wave echo signals reflected back by users within the detection area of ​​the millimeter-wave radar antenna array. It also processes the received millimeter-wave echo signals to obtain the user's vital signs parameters. Radio frequency front-end components are used for frequency conversion and / or signal amplification of millimeter-wave signals and / or millimeter-wave echo signals.

[0053] Specifically, the display device in this embodiment further includes a display driving circuit, a timing control circuit, and a signal processing circuit (e.g., a digital signal processor); a specific block diagram of the display device is shown below. Figure 6 As shown.

[0054] The timing control circuit is used to divide the display period of the displayed image and the radar working period of the millimeter-wave radar antenna array within the display frame period; The display driving circuit is used to drive the display panel to display images during the display period; The radar control circuit is specifically used to control the radio frequency front-end circuit to drive the millimeter-wave radar antenna array to transmit millimeter-wave signals during the radar's operating period of a display frame cycle, and to receive millimeter-wave echo signals reflected by the user's body through the millimeter-wave radar antenna array.

[0055] It should be understood that the timing control circuit described above can achieve time-division multiplexing of display function and vital sign monitoring function by dividing the display frame period.

[0056] Specifically, the display period can occupy a first percentage of the display frame cycle, and the radar operating period can occupy a second percentage of the display frame cycle, with the first percentage being greater than the second percentage.

[0057] For example, the first percentage can be 95%, and the second percentage can be 5%. Of course, the specific percentage can be adjusted according to the display refresh rate and the accuracy requirements of vital sign monitoring, as long as the percentage of the display period is greater than the percentage of the radar working period.

[0058] In another optional embodiment, to accommodate the use of the display device in different orientations, the display device also includes an attitude sensor for detecting the orientation of the display device. The attitude sensor can be mounted on a circuit board and is used to detect whether the display device is currently placed horizontally or vertically, and outputs attitude information to the radar control circuit. The radar control circuit is configured to select the horizontally positioned antenna portion of the millimeter-wave radar antenna array as both the transmitting and receiving antennas based on the orientation detected by the attitude sensor, ensuring that the detection area always covers the user's body in front of the display device regardless of the orientation.

[0059] Specifically, see Figure 7 The diagram shows a horizontally positioned display device according to an embodiment of this application. RGB pixels are arranged in a row-column array within the display area of ​​the display panel, with a black matrix area between adjacent RGB pixels. A millimeter-wave radar comb antenna 11 is arranged in the black matrix area on the left side of the display area, a millimeter-wave radar comb antenna 12 is arranged in the black matrix area on the right side of the display area, and millimeter-wave radar comb antennas 14 and 13 are arranged in the black matrix areas on the upper and lower sides of the display area, respectively.

[0060] When the attitude sensor detects that the display device is in a horizontal position, the radar control circuit selects from the pair of antenna arrays that are currently in a horizontal position. Figure 7Several comb antenna elements in the antenna subarray containing the left-side comb antenna 11 serve as transmitting antennas, while several comb antenna elements in the antenna subarray containing the right-side comb antenna 12, which is arranged horizontally opposite to it, serve as receiving antennas. In this way, the transmitting and receiving antennas are positioned opposite each other along the width of the display panel, with their connection roughly aligned with the horizontal direction of the user's shoulders. This creates a millimeter-wave transceiver link that spans the entire display area horizontally in front of the display device, ensuring that the chest area of ​​the user sitting directly in front of the screen falls within the detection area, thus enabling vital sign monitoring in landscape mode.

[0061] Specifically, see Figure 8 The diagram shown is a vertically positioned schematic of the display device provided in an embodiment of this application; at this time, the entire display panel is relative to... Figure 7 Rotating 90°, the RGB pixels are also arranged in a row and column array within the display area, with a black matrix area between adjacent RGB pixels. A millimeter-wave radar comb antenna 11 is arranged in the black matrix area on the upper side of the display area, a millimeter-wave radar comb antenna 12 is arranged in the black matrix area on the lower side of the display area, and millimeter-wave radar comb antennas 13 and 14 are arranged in the black matrix areas on the left and right sides of the display area, respectively.

[0062] When the attitude sensor detects that the display device is in a vertical orientation (portrait mode), the radar control circuit, based on the attitude information, reselects from the pair of antenna subarrays currently in a horizontal position. For example, it can... Figure 8 The left-side comb antenna 13, located in the antenna subarray, serves as a transmitting antenna, while the right-side comb antenna 14, arranged horizontally opposite it, serves as a receiving antenna. This arrangement ensures that the transmitting and receiving antennas remain horizontally aligned across the display area even in portrait mode. Consequently, even when the display switches from landscape to portrait mode, the main beam of the millimeter-wave transceiver link remains directed towards the user's chest area in front of the screen, guaranteeing stable vital sign monitoring regardless of the orientation.

[0063] In another alternative embodiment, in order to track the user's vital signs over a long period of time and provide intelligent early warning, the display device may also include a signal processing circuit and an artificial intelligence processing unit.

[0064] The signal processing circuit is arranged on the circuit board. The signal processing circuit is used to obtain the millimeter-wave signal echo received by the millimeter-wave radar antenna array through the conductive connection structure set in the bezel of the display panel. The signal processing circuit is used to analyze and process the millimeter-wave signal echo to obtain the user's vital signs parameters. The artificial intelligence processing unit is electrically connected to the signal processing circuit and is used to analyze whether the user's physiological state is abnormal based on the user's historical monitoring data and vital sign parameters.

[0065] When the artificial intelligence processing unit determines that vital signs parameters are abnormal or show an abnormal trend, it can output a warning signal to the display driver circuit or the system main control circuit to control the display device to pop up a prompt interface on the screen and / or send warning information to the terminal through the network, thereby realizing proactive reminders of potential health risks to users.

[0066] As can be seen from the above embodiment 2, the display device provided by this application integrates the display panel and radar circuit, display driving circuit, timing control circuit and other modules of embodiment 1 in terms of structure. It can not only provide normal image display function, but also realize non-contact continuous monitoring of the vital signs of the user in front of the screen without significantly increasing the size and weight of the whole machine. Furthermore, it can achieve adaptive control of different placement directions and display / monitoring timing through posture sensors and timing control, which further improves the intelligence and flexibility of the display device.

[0067] Example 3 This embodiment provides a method for monitoring vital signs. This method is applied to the display device included in any optional embodiment of Embodiment 2 above. For details, see [link to embodiment]. Figure 9 The illustrated flowchart shows a vital signs monitoring method provided in an embodiment of this application. The method may include the following steps: Step 901: During a radar operating period of one display frame cycle, the radar control circuit controls the radio frequency front-end circuit to drive the millimeter-wave radar antenna array to transmit millimeter-wave signals and receive millimeter-wave echo signals reflected by the user's body through the millimeter-wave radar antenna array.

[0068] The display frame period refers to the time interval required for the display panel to complete one full-screen refresh. For example, at a refresh rate of 60Hz, the display frame period for a single frame is approximately 16.7 ms.

[0069] The radar operating period refers to a time segment within a display frame cycle that is specifically used for millimeter-wave radar transmission and reception. This period is staggered from the display period to avoid electromagnetic interference between the display driver and the radar driver.

[0070] The radar control circuit, which is part of the radar circuit in Embodiment 2, is used to generate radar transmission control signals, operating mode control signals, and sampling trigger signals, and to perform overall timing management of the radio frequency front-end circuit and the millimeter-wave radar antenna array.

[0071] The radio frequency front-end circuit, including radio frequency devices such as power amplifiers, low-noise amplifiers, mixers, and local oscillators, is used to up-convert and amplify baseband or intermediate frequency radar signals on the transmit link and send them to the antenna array, as well as to amplify, down-convert, and filter the echo signals from the antenna array on the receive link.

[0072] The millimeter-wave radar antenna array, as described in Embodiment 1, is an antenna structure located in the black matrix area on the color filter side. It may include a transmitting antenna subarray and a receiving antenna subarray, used to radiate and receive millimeter-wave signals in the space in front of the display panel.

[0073] Among them, the echo signal refers to the signal obtained by the receiving antenna subarray after the millimeter-wave radar transmits the signal and it is reflected by the target object such as the user's body, and then processed by the radio frequency front-end circuit.

[0074] In a specific embodiment of step 901, when the display frame period enters the radar operating period, the timing control circuit suspends the refresh of the pixel array layer and instead outputs a radar operating trigger signal to the radar control circuit. The radar control circuit activates the radio frequency front-end circuit, causing the power amplifier to amplify the millimeter-wave signal to be transmitted and radiate it to the space in front of the display panel through the transmitting antenna subarray. At the same time, the radar control circuit controls the receiving antenna subarray and the low-noise amplifier to operate according to a preset timing sequence, sequentially receiving the millimeter-wave echo signals reflected from the user's chest, abdomen, and other parts, and after amplification, down-conversion, and filtering, outputting an echo signal in intermediate frequency or baseband form.

[0075] In one specific implementation, the display device has a refresh rate of 60 Hz, and each display frame period is 16.7 ms, of which approximately 2.7 ms can be used as the radar operating period. The radar control circuit transmits several linear frequency modulated millimeter wave pulse sequences during each radar operating period and synchronously collects echoes during the transmission intervals, thereby continuously acquiring displacement information related to breathing and heartbeat without affecting the user's viewing experience.

[0076] In one possible implementation, the display frame period also includes a display time period, in which the pixel array layer of the display panel is driven by the display driving circuit to display the image during the display time period of the display frame period.

[0077] The display period refers to the time segment within a display frame cycle used to write line scan signals and data signals to the pixel array layer and maintain image display.

[0078] The display driving circuit, in this embodiment, may include a row driving circuit, a column driving circuit, and a timing control circuit, etc., for driving and controlling each pixel unit in the pixel array layer row by row and column by column according to the input video data.

[0079] The pixel array layer, which is the pixel circuit layer on the array substrate in Embodiment 1, includes structures such as thin-film transistors and pixel electrodes, and is used to modulate the liquid crystal layer or the light-emitting layer according to the signal provided by the display driving circuit to form an image.

[0080] In the specific implementation of this method, the timing control circuit first divides the display time period into each display frame cycle, and issues scanning timing and data loading timing to the display driving circuit during the time period. The display driving circuit selects the thin film transistors of the corresponding row in a predetermined row and column scanning order, and writes the video data of the current frame into the data line of the corresponding column, so that each pixel unit in the pixel array layer reaches the target gray level in the current frame cycle, thereby forming a stable image display on the display panel.

[0081] For example, in one specific implementation, the display device has a refresh rate of 60 Hz and each display frame period is 16.7 ms, of which approximately 14 ms can be divided into display periods. Within these 14 ms, the timing control circuit sequentially triggers the row driving circuit to scan all rows, and the column driving circuit writes a frame of video data into the pixel units of all columns, ensuring that the user sees a continuous, flicker-free image on the screen.

[0082] Step 902: The signal processing circuit performs signal processing on the millimeter-wave echo signal to obtain the user's vital signs parameters, and inputs the vital signs parameters into the artificial intelligence processing unit.

[0083] The signal processing circuit refers to a dedicated processing chip or module mounted on a circuit board, used to digitize, filter, demodulate, and extract features from millimeter-wave echo signals from the radio frequency front-end components. The signal processing circuit can be a digital signal processor.

[0084] Among them, vital signs parameters, in this embodiment, may include, but are not limited to, the user's respiratory rate, heart rate, respiratory amplitude, heart rate intensity, and heart rate variability calculated from the above basic parameters, which are used to characterize the user's vital signs status.

[0085] The artificial intelligence processing unit refers to the artificial intelligence processing module set in the display device. It can be an independent dedicated chip or an AI acceleration unit in a system-on-a-chip. It is used to model, analyze and intelligently judge the vital signs parameters output by the signal processing circuit.

[0086] In a specific embodiment of step 902, the radar control circuit sends the millimeter-wave echo signal, processed by the radio frequency front-end component, to the signal processing circuit. The signal processing circuit first performs analog-to-digital conversion on the millimeter-wave echo signal to obtain time-series sampling data. Then, it performs preprocessing on the sampling data, including DC removal, bandpass filtering, and clutter suppression, to eliminate the influence of environmental static reflections and high-frequency noise. Next, the signal processing circuit uses algorithms such as phase demodulation or range-Doppler transform to extract phase or amplitude change curves related to the user's minute chest displacement. Then, it performs spectral analysis and peak detection in the respiratory and heart rate bands respectively to obtain the corresponding vital signs parameters such as respiratory rate and heart rate.

[0087] For example, in one specific implementation, the signal processing circuit can perform a Fast Fourier Transform (FFT) on the millimeter-wave echo signal, search for the respiratory peak in the 0.1–0.5 Hz frequency band to determine the respiratory rate, search for the heartbeat peak in the 0.8–2 Hz frequency band to determine the heart rate, and simultaneously calculate the statistical fluctuation of the heart rate within a certain time window for subsequent anomaly detection.

[0088] Step 903: The artificial intelligence processing unit performs trend analysis on the vital signs parameters to obtain the predicted vital signs values, and judges whether the vital signs parameters are abnormal based on the predicted vital signs values.

[0089] Among them, trend analysis of vital sign parameters can use pre-trained models, which are parameterized models trained offline using machine learning or deep learning algorithms based on a large amount of historical vital sign data and corresponding health labeling data. Examples include time-series prediction models or anomaly detection models used to analyze vital sign values ​​such as heart rate and respiratory trends.

[0090] Trend analysis refers to the process by which artificial intelligence processing units statistically analyze and model continuously collected vital sign parameters over a longer time scale to obtain trend curves, fluctuation ranges, and characteristic indicators of vital signs over time.

[0091] In a specific embodiment of step 903, the artificial intelligence processing unit is electrically connected to the signal processing circuit and to a storage module for storing historical vital sign data. After each radar operating period ends, the signal processing circuit outputs the currently detected vital sign parameters, such as heart rate and respiratory rate. The artificial intelligence processing unit obtains the vital sign parameters at the current moment from the signal processing circuit and simultaneously retrieves the historical vital sign parameter sequence corresponding to the user from the storage module. Based on the historical vital sign parameter sequence, the artificial intelligence processing unit performs trend analysis, such as smoothing the heart rate and respiratory rate over a historical period, fitting trend curves and fluctuation ranges, and inputting the trend analysis results into a pre-trained vital sign prediction model to obtain predicted vital sign values ​​at the current moment or a predetermined future moment. The predicted vital sign values ​​may include at least one of the predicted heart rate value and the predicted respiratory rate value, or a combination of both.

[0092] After obtaining the predicted vital sign values, the AI ​​processing unit further compares and analyzes them with the currently detected vital sign parameters in real time. For example, the AI ​​processing unit can calculate the deviation between the predicted vital sign values ​​and the real-time vital sign parameters, and combine this with the health risk score or classification results output by the pre-trained model to determine whether the current vital sign parameters fall within the normal fluctuation range. When the deviation exceeds a preset threshold and / or the pre-trained model determines the current vital sign status as abnormal, the AI ​​processing unit outputs the abnormality determination result to the abnormality warning module, which controls the display device to pop up a prompt interface on the display panel and / or sends a warning message to the mobile terminal through an external communication module. When the status is determined to be normal, the AI ​​processing unit writes the current vital sign parameters and their prediction results into the storage module as historical reference data for subsequent trend analysis, thereby achieving continuous trend tracking and adaptive updates of the user's vital signs.

[0093] For example, in a specific application scenario, the display device continuously monitors a user for 10 minutes in a resting state. The heart rate parameters output by the signal processing circuit are mainly distributed between 72 and 82 beats per minute over the past 10 minutes. The artificial intelligence processing unit performs trend analysis based on historical heart rate data during this period and obtains a predicted heart rate of 78 beats per minute through a pre-trained model. Subsequently, after a new radar working period ends, the current real-time heart rate output by the signal processing circuit is 110 beats per minute. The artificial intelligence processing unit calculates that the difference between the predicted heart rate and the real-time heart rate is 32 beats per minute, exceeding the preset deviation threshold of 20 beats per minute. At the same time, the pre-trained model determines the current state as "suspected abnormally high heart rate". In this case, the artificial intelligence processing unit submits the abnormality determination result to the abnormality warning module. The abnormality warning module controls the display device to pop up a prompt interface on the screen saying "Abnormally high heart rate, please rest or seek medical attention promptly", and can also push a warning notification containing a heart rate change curve to the user's bound mobile terminal. After a user confirms or marks a warning on their mobile device, the relevant feedback data can be sent back to the artificial intelligence processing unit to update and optimize the parameters of the subsequent prediction model, thereby gradually improving the accuracy of the prediction of the user's individual vital signs.

[0094] Step 904: When vital signs parameters are abnormal, the display driving circuit displays a prompt interface on the display device and / or sends a warning message to the terminal through the display device.

[0095] The prompt interface refers to the graphical user interface that pops up on the screen of the display device, which is used to intuitively prompt the user that there is an abnormality in the current vital signs, including text prompts, color highlighting, or icon flashing.

[0096] Among them, a terminal refers to an external device that communicates with a display device via wired or wireless means, such as a user's mobile phone, tablet computer, or a nursing staff's on-duty terminal.

[0097] Among them, early warning information refers to alarm messages generated by the display device and sent to external terminals, which may include the type of abnormality, the time of occurrence, the duration, and the suggested handling method.

[0098] In a specific implementation of step 904, when the artificial intelligence processing unit determines that the current vital signs parameters are in an abnormal state based on a pre-trained model, it outputs an abnormality flag to the system control module of the display device. The system control module, on the one hand, controls the display driving circuit to overlay a pop-up prompt interface on the current display screen, such as displaying prompts like "Abnormal heart rate, please rest" or "Abnormal breathing, it is recommended to seek medical attention promptly" in a prominent position on the screen; on the other hand, it generates corresponding warning information according to the user-preset alarm strategy and sends it to the bound terminal via the wireless communication module.

[0099] In an optional embodiment, for ease of understanding the implementation process of steps 903 and 904, as follows: Figure 10 As shown, a schematic diagram of the abnormal early warning processing flow for vital sign monitoring is presented.

[0100] Figure 10 In this context, "RF / radar control circuit" corresponds to the radar circuit and its control section in Embodiment 2, used to control the millimeter-wave radar antenna array to transmit and receive radar signals; "millimeter-wave radar antenna array" corresponds to the antenna structure located inside the display panel; "signal processing circuit" corresponds to the aforementioned processor that demodulates and extracts features from the echo signal; "storage module: hierarchical storage of raw / feature data" is used to hierarchically store the raw waveform data acquired by the radar and the feature data such as vital sign parameters extracted by the signal processing circuit; "heart health-related model pre-training" refers to the model training process completed during the device manufacturing or deployment phase, used to obtain a pre-trained model related to vital signs; "AI processing unit" corresponds to step 903. The AI ​​processing unit (hereinafter referred to as the AI ​​processing unit) is used for the following: "Anomaly Warning Module" controls the alarm logic applied to drive screen pop-ups and external message pushes; "User Receives Warning" means that the user views the warning information on the screen or external terminal; "Continuous Monitoring" means that if the situation is determined to be normal, the monitoring loop consisting of steps 901 to 903 will continue to be executed; "User Feedback" means that the user confirms or marks the warning result and sends it back to the AI ​​processing unit for subsequent model optimization.

[0101] In terms of specific procedures, such as Figure 10As shown, the radio frequency and radar control circuit controls the millimeter-wave radar antenna array to transmit / receive millimeter-wave signals. The heart rate, respiratory signals, and other data obtained after demodulation by the signal processing circuit are first written to the storage module, where they are stored in two layers: raw data and feature data. On one hand, this feature data is sent to the AI ​​processing unit in real time; on the other hand, pre-trained parameters of the heart health-related model are also loaded into the AI ​​processing unit. Based on the current feature data and historical feature data stored in the storage module over a period of time, the AI ​​processing unit performs trend analysis on the user's vital signs and outputs a "yes / no" result at the "Abnormal situation?" judgment node. If the judgment result is "no," the process enters the "continuous monitoring" branch, and the system maintains normal monitoring. New vital sign data continues to be written to the storage module and enters the next round of analysis. If the judgment result is "yes," the process enters the abnormal warning module, which controls the display device to pop up a prompt interface on the screen and sends warning information to external terminals such as the user's mobile phone as needed. After viewing the warning, the user can provide feedback through interface buttons or mobile terminals. This feedback information is sent back to the AI ​​processing unit for correction of subsequent abnormal judgments or model updates.

[0102] For example, in a specific application scenario, the display device detects that the user's heart rate gradually increases from 75 beats / minute to 110 beats / minute while the user is sitting, accompanied by a significant increase in heart rate variability. The signal processing circuit writes the heart rate curve and statistical characteristics corresponding to this change into the storage module. The AI ​​processing unit analyzes this data using a pre-trained cardiac health model. If the "Abnormal situation?" node is determined to be "yes", the abnormal warning module is triggered, causing the screen to display a message stating "Heart rate abnormally high, please rest or seek medical attention promptly," and sending a warning message containing the heart rate curve to the linked mobile phone. The user confirms the warning on their mobile phone and selects "Understood." This feedback is recorded in the AI ​​processing unit for subsequent optimization of the recognition strategy for similar heart rate change patterns. After processing this warning, the system returns to the "Continuous Monitoring" branch to continue the periodic vital sign monitoring process.

[0103] Thus, through Figure 10 The abnormal warning processing flow shown can more intuitively demonstrate the specific implementation of steps 903 and 904, namely, "judging whether vital signs parameters are abnormal based on a pre-trained model, and controlling the display device to pop up a prompt interface and / or sending warning information to an external terminal when an abnormality occurs".

[0104] Through the coordinated execution of steps 901 to 904 above, the vital signs monitoring method provided in this embodiment can continuously acquire the user's vital signs parameters by utilizing the millimeter-wave radar antenna array and supporting circuitry integrated inside the display panel without affecting the normal display function of the display device. It can also combine AI models to achieve intelligent identification and early warning of abnormal states, thereby improving the practicality and reliability of non-contact vital signs monitoring.

[0105] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0106] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that, The display panel includes an array substrate, a color filter substrate, and a millimeter-wave radar antenna array located between the color filter substrate and the array substrate, wherein the millimeter-wave radar antenna array is at least partially located in the black matrix region of the color filter substrate; A millimeter-wave radar antenna array is electrically connected to a radar circuit via a conductive connection structure. It is used to transmit millimeter-wave signals under the control of the radar circuit and to receive millimeter-wave echo signals reflected back by a user within the detection area of ​​the millimeter-wave radar antenna array. The millimeter-wave echo signals are used to determine the user's vital signs parameters. The conductive connection structure is disposed in the bezel of the display panel.

2. The display panel as described in claim 1, characterized in that, The millimeter-wave radar antenna array includes at least one transmitting antenna array and one receiving antenna array. The transmitting antenna array and the receiving antenna array are respectively located in the black matrix areas on opposite sides of the display area of ​​the display panel, and are used to form a millimeter-wave transceiver link across the display area. The millimeter-wave transceiver link is used to transmit the millimeter-wave signal and to receive the millimeter-wave echo signal.

3. The display panel as described in claim 2, characterized in that, The transmitting antenna array and / or the receiving antenna array includes a common feed line extending along a predetermined direction and a plurality of radiating elements electrically connected to the common feed line. The plurality of radiating elements extend from one or both sides of the common feed line at intervals and are arranged in a comb-like manner. Each of the radiating elements constitutes an independent radiating element for transmitting millimeter-wave signals or receiving millimeter-wave echo signals.

4. The display panel as described in claim 3, characterized in that, The plurality of radiating elements have at least two different widths in the width direction, so that radiating elements of different widths correspond to different transmission frequency bands, thereby covering the predetermined operating frequency band; In this configuration, at least a portion of the radiating elements in the transmitting antenna array are configured to collaboratively transmit millimeter-wave signals to form a synthetic beam pointing toward the detection area.

5. The display panel as described in any one of claims 2 to 4, characterized in that, The millimeter-wave radar antenna array includes multiple antenna subarrays arranged on the four sides around the display area. The multiple antenna subarrays include a first antenna subarray and a second antenna subarray arranged opposite each other along a first direction, and / or a third antenna subarray and a fourth antenna subarray arranged opposite each other along a second direction. The first direction is perpendicular to the second direction. One of the first antenna subarray and the second antenna subarray serves as a transmitting antenna and the other as a receiving antenna. One of the third antenna subarray and the fourth antenna subarray serves as a transmitting antenna and the other as a receiving antenna.

6. A display device, characterized in that; The display device includes; The display panel as described in any one of claims 1 to 5; A circuit board is disposed on one side of the array substrate; A radar circuit, mounted on the circuit board, includes a radio frequency front-end assembly and a radar control circuit. The radar control circuit is electrically connected to the millimeter-wave radar antenna array via the conductive connection structure. It controls the millimeter-wave radar antenna array to transmit millimeter-wave signals and receive millimeter-wave echo signals reflected back by a user within the detection area of ​​the millimeter-wave radar antenna array. It also processes the received millimeter-wave echo signals to obtain the user's vital signs parameters. The radio frequency front-end assembly is used to perform frequency conversion and / or signal amplification processing on the millimeter-wave signals and / or the millimeter-wave echo signals.

7. The display device as claimed in claim 6, further comprising a display driving circuit and a timing control circuit; The timing control circuit is used to divide the display time period of the displayed image and the radar working time period of the millimeter-wave radar antenna array within the display frame period. The display driving circuit is used to drive the display panel to display images during the display period; The radar control circuit is specifically used to control the radio frequency front-end circuit to drive the millimeter-wave radar antenna array to transmit millimeter-wave signals during a radar working period of one display frame period, and to receive millimeter-wave echo signals reflected by the user's body through the millimeter-wave radar antenna array. The display period occupies a first percentage of the display frame period, and the radar operating period occupies a second percentage of the display frame period, wherein the first percentage is greater than the second percentage.

8. The display device as claimed in claim 6, characterized in that, The conductive connection structure is a conductive silver paste located in the bezel of the display panel.

9. The apparatus as claimed in claim 6, characterized in that, The display device includes an attitude sensor, which is used to detect the orientation of the display device. The radar control circuit is configured to: select a first part of the millimeter-wave radar antenna array that is in a horizontal position as a transmitting antenna, based on the orientation detected by the attitude sensor, and select a second part that is in a horizontal position and arranged opposite to the first part as a receiving antenna.

10. The apparatus according to any one of claims 6 to 9, characterized in that, The display device further includes a signal processing circuit arranged on the circuit board. The signal processing circuit is used to acquire the millimeter-wave signal echo received by the millimeter-wave radar antenna array through a conductive connection structure disposed in the bezel of the display panel. The signal processing circuit is used to analyze and process the millimeter-wave signal echo to obtain the user's vital signs parameters. The display device further includes an artificial intelligence processing unit, which is electrically connected to the signal processing circuit and is used to analyze whether the user's physiological state is abnormal based on the user's historical monitoring data and vital sign parameters.

11. A method for monitoring vital signs, characterized in that, The method is applied to the display device as described in any one of claims 6 to 10, the method comprising: During a radar operating period of one display frame cycle, the radar control circuit controls the radio frequency front-end circuit to drive the millimeter-wave radar antenna array to transmit millimeter-wave signals and receive millimeter-wave echo signals reflected by the user's body through the millimeter-wave radar antenna array. The signal processing circuit performs signal processing on the millimeter-wave echo signal to obtain the user's vital signs parameters, and inputs the vital signs parameters into the artificial intelligence processing unit; The artificial intelligence processing unit performs trend analysis on the vital sign parameters to obtain predicted vital sign values, and determines whether the vital sign parameters are abnormal based on the predicted vital sign values. When the vital signs parameters are abnormal, the display driving circuit displays a prompt interface on the display device and / or sends a warning message to the terminal through the display device.

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