Pressure sensor, smart pad including same, and display system

Abstract

Disclosed are a pressure sensor, a smart pad including same, and a display system. A smart pad according to at least one of various embodiments of the present disclosure comprises: a first electrode; a second electrode including a sensing channel; and a pressure sensor including a first elastic dielectric arranged between the first electrode and the second electrode, wherein at least one air flow passage may be formed in the first electrode of the pressure sensor.

Description

Pressure sensor, smart pad and display system including it

[0001] The present disclosure relates to a pressure sensor, a smart pad including the same, and a display system.

[0002] The functions of display devices have recently become more diverse, including data and voice communication, taking pictures and videos using cameras, voice recording, playing music files using speaker systems, and outputting images or videos to the display.

[0003] Some display devices have added electronic game play capabilities or perform multimedia player functions.

[0004] As display devices become more diverse in their functions, they are being implemented in the form of multimedia players with complex functions such as taking photos or videos, playing music or video files, playing games, and receiving broadcasts.

[0005] The present disclosure provides a display system including a pressure sensor that performs more accurate pressure sensing by minimizing noise, a smart pad including the pressure sensor, and a display device that communicates with and processes the smart pad.

[0006] A smart pad according to at least one of the various embodiments of the present disclosure comprises a pressure sensor including a first electrode, a second electrode including a sensing channel, and a first elastic dielectric disposed between the first electrode and the second electrode, wherein at least one air flow passage may be formed in the first electrode of the pressure sensor.

[0007] The pressure sensor according to at least one of the various embodiments of the present disclosure may further include a third electrode formed at a position corresponding to the first electrode.

[0008] The pressure sensor according to at least one of the various embodiments of the present disclosure may further include a second elastic dielectric disposed between the second electrode and the third electrode.

[0009] The at least one air flow passage according to at least one of the various embodiments of the present disclosure may be formed to extend from the first electrode to the first elastic dielectric by a predefined depth in the pressurized direction.

[0010] Each of the airflow passages according to at least one of the various embodiments of the present disclosure may have different extending depths.

[0011] The first electrode according to at least one of the various embodiments of the present disclosure may be formed as a porous fabric electrode having at least one air flow passage formed therein.

[0012] The at least one air flow passage according to at least one of the various embodiments of the present disclosure may be formed by cutting, removing a specific area, or punching when the first electrode is formed as a fabric electrode.

[0013] A display system according to at least one of the various embodiments of the present disclosure comprises a smart pad including a pressure sensor including a first electrode, a second electrode including a sensing channel, and a first elastic dielectric disposed between the first electrode and the second electrode; and a display device, wherein at least one air flow passage may be formed in the first electrode of the pressure sensor.

[0014] The pressure sensor according to at least one of the various embodiments of the present disclosure may further include a third electrode formed at a position corresponding to the first electrode.

[0015] The pressure sensor according to at least one of the various embodiments of the present disclosure may further include a second elastic dielectric disposed between the second electrode and the third electrode.

[0016] The at least one air flow passage according to at least one of the various embodiments of the present disclosure may be formed to extend from the first electrode to the first elastic dielectric by a predefined depth in the pressurized direction.

[0017] Each of the airflow passages according to at least one of the various embodiments of the present disclosure may have different extending depths.

[0018] The first electrode according to at least one of the various embodiments of the present disclosure may be formed as a porous fabric electrode having at least one air flow passage formed therein.

[0019] The at least one air flow passage according to at least one of the various embodiments of the present disclosure may be formed by cutting, removing a specific area, or punching when the first electrode is formed as a fabric electrode.

[0020] According to at least one of the various embodiments of the present disclosure, there is an effect that more accurate pressure sensing can be performed by suppressing or minimizing noise generation due to pressure.

[0021] According to at least one of the various embodiments of the present disclosure, there is an effect of protecting a pressure sensor from electrostatic discharge (ESD) and the like, thereby extending the product lifespan and improving reliability.

[0022] According to at least one of the various embodiments of the present disclosure, accurate pressure sensing can be used to derive accurate results corresponding to the user's movement, thereby increasing the user's satisfaction with the product.

[0023] FIG. 1 is a block diagram of a display device according to an embodiment of the present disclosure;

[0024] FIG. 2 is a block diagram of a remote control device according to an embodiment of the present disclosure;

[0025] FIG. 3 is an example of an actual configuration of a remote control device according to an embodiment of the present disclosure;

[0026] FIG. 4 is an example of utilizing a remote control device according to an embodiment of the present disclosure;

[0027] FIG. 5 is a drawing for explaining the horizontal mode and vertical mode of a stand-type display device according to an embodiment of the present disclosure;

[0028] FIG. 6 is a schematic diagram of a display system according to one embodiment of the present disclosure;

[0029] Fig. 7 is a drawing illustrating the types of pressure sensors;

[0030] FIGS. 8 to 9 are drawings illustrating the structure of a pressure sensor included in a smart pad according to an embodiment of the present disclosure;

[0031] FIG. 10 is a graph illustrating the characteristics of a pressure sensor according to an embodiment of the present disclosure;

[0032] FIGS. 11 to 13 are drawings illustrating the structure and signal characteristics of a pressure sensor according to an embodiment of the present disclosure;

[0033] FIGS. 14 and 15 are drawings illustrating the structure and signal characteristics of a pressure sensor according to another embodiment of the present disclosure;

[0034] FIG. 16 is a drawing illustrating an example of an air flow passage formed in a pressure sensor according to one embodiment of the present disclosure;

[0035] Fig. 17 is a drawing illustrating an example of a planar circuit diagram of the pressure sensor of Fig. 14;

[0036] Fig. 18 is a graph illustrating signal characteristics according to the pressure sensor of Fig. 11; and

[0037] Fig. 19 is a graph illustrating signal characteristics according to the pressure sensor of Fig. 14.

[0038] Hereinafter, embodiments related to the present disclosure will be described in more detail with reference to the drawings. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the convenience of writing the specification, and do not in themselves have distinct meanings or roles.

[0039] FIG. 1 is a block diagram illustrating the configuration of a display device (100) according to one embodiment of the present disclosure.

[0040] Referring to FIG. 1, the display device (100) may include a broadcast receiving unit (130), an external device interface unit (135), a storage unit (140), a user input interface unit (150), a control unit (170), a wireless communication unit (173), a voice acquisition unit (175), a display unit (180), an audio output unit (185), and a power supply unit (190).

[0041] The broadcast receiving unit (130) may include a tuner (131), a demodulation unit (132), and a network interface unit (133).

[0042] The tuner (131) can select a specific broadcast channel according to a channel selection command. The tuner (131) can receive a broadcast signal for the selected specific broadcast channel.

[0043] The demodulator (132) can separate the received broadcast signal into a video signal, an audio signal, and a data signal related to the broadcast program, and can restore the separated video signal, audio signal, and data signal into a form that can be output.

[0044] The network interface unit (133) may provide an interface for connecting the display device (100) to a wired / wireless network including the Internet. The network interface unit (133) may transmit or receive data to or from other users or other electronic devices via the connected network or another network linked to the connected network.

[0045] The network interface unit (133) can access a predetermined web page through a connected network or another network linked to the connected network. In other words, it can access a predetermined web page through a network and transmit or receive data with the corresponding server.

[0046] In addition, the network interface unit (133) can receive content or data provided by a content provider or network operator. That is, the network interface unit (133) can receive content such as movies, advertisements, games, VOD (Video on Demand), broadcast signals, etc., and information related thereto provided from a content provider or network provider via a network.

[0047] Additionally, the network interface unit (133) can receive firmware update information and update files provided by the network operator, and transmit data to the Internet or content provider or network operator.

[0048] The network interface unit (133) can select and receive a desired application from among applications open to the public via a network.

[0049] The external device interface unit (135) can receive an application or a list of applications in an adjacent external device and transmit it to the control unit (170) or storage unit (140).

[0050] The external device interface unit (135) can provide a connection path between the display device (100) and the external device. The external device interface unit (135) can receive one or more of images and audio output from an external device connected wirelessly or wiredly to the display device (100) and transmit them to the control unit (170). The external device interface unit (135) can include a plurality of external input terminals. The plurality of external input terminals can include an RGB terminal, one or more HDMI (High Definition Multimedia Interface) terminals, and a component terminal.

[0051] The voice signal of an external device input through the external device interface unit (135) can be output through the display unit (180). The voice signal of an external device input through the external device interface unit (135) can be output through the audio output unit (185).

[0052] An external device that can be connected to the external device interface unit (135) may be any one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB memory, and a home theater, but this is only an example.

[0053] Additionally, some content data stored in the display device (100) can be transmitted to a selected user or electronic device among other users or other electronic devices pre-registered in the display device (100).

[0054] The storage unit (140) stores programs for each signal processing and control within the control unit (170), and can store signal-processed images, voices, or data signals.

[0055] In addition, the storage unit (140) may perform a function for temporary storage of video, audio, or data signals input from an external device interface unit (135) or a network interface unit (133), and may also store information about a specific image through a channel memory function.

[0056] The storage unit (140) can store an application or a list of applications input from the external device interface unit (135) or the network interface unit (133).

[0057] The display device (100) can play content files (video files, still image files, music files, document files, application files, etc.) stored in the storage unit (140) and provide them to the user.

[0058] The user input interface unit (150) can transmit a signal input by a user to the control unit (170), or transmit a signal from the control unit (170) to the user. For example, the user input interface unit (150) can receive and process control signals such as power on / off, channel selection, and screen setting from the remote control device (200) according to various communication methods such as Bluetooth, Ultra Wideband (UWB), ZigBee, Radio Frequency (RF) communication, or infrared (IR) communication, or process the control signals from the control unit (170) to be transmitted to the remote control device (200).

[0059] In addition, the user input interface unit (150) can transmit control signals input from local keys (not shown) such as a power key, channel key, volume key, and setting value to the control unit (170).

[0060] An image signal processed by the control unit (170) can be input to the display unit (180) and displayed as an image corresponding to the image signal. In addition, an image signal processed by the control unit (170) can be input to an external output device through the external device interface unit (135).

[0061] The voice signal processed in the control unit (170) can be output as audio to the audio output unit (185). In addition, the voice signal processed in the control unit (170) can be input to an external output device through the external device interface unit (135).

[0062] In addition, the control unit (170) can control the overall operation within the display device (100).

[0063] In addition, the control unit (170) can control the display device (100) by a user command or internal program input through the user input interface unit (150), and can connect to a network to enable the user to download a desired application or application list into the display device (100).

[0064] The control unit (170) enables the channel information selected by the user to be output through the display unit (180) or audio output unit (185) together with the processed video or audio signal.

[0065] In addition, the control unit (170) allows a video signal or audio signal from an external device, for example, a camera or camcorder, input through the external device interface unit (135) to be output through the display unit (180) or audio output unit (185) in accordance with an external device video playback command received through the user input interface unit (150).

[0066] Meanwhile, the control unit (170) can control the display unit (180) to display an image, and for example, can control the display unit (180) to display a broadcast image input through the tuner (131), an external input image input through the external device interface unit (135), an image input through the network interface unit, or an image stored in the storage unit (140). In this case, the image displayed on the display unit (180) can be a still image or a moving image, and can be a 2D image or a 3D image.

[0067] In addition, the control unit (170) can control the playback of content stored in the display device (100), received broadcast content, or external input content input from outside, and the content can be in various forms such as broadcast video, external input video, audio file, still image, connected web screen, and document file.

[0068] The wireless communication unit (173) can communicate with an external device through wired or wireless communication. The wireless communication unit (173) can perform short range communication with an external device. For this purpose, the wireless communication unit (173) can be configured to use Bluetooth. TM), BLE (Bluetooth Low Energy), RFID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB, ZigBee, NFC (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus) technologies can be used to support short-range communication. The wireless communication unit (173) can support wireless communication between the display device (100) and a wireless communication system, between the display device (100) and another display device (100), or between the display device (100) and a network where the display device (100, or an external server) is located through short-range wireless communication networks (Wireless Area Networks). The short-range wireless communication networks can be short-range wireless personal area networks (Wireless Personal Area Networks).

[0069] Here, the other display device (100) may be a wearable device (e.g., a smart watch, smart glasses, a head mounted display (HMD), a mobile terminal such as a smart phone) that can exchange data with the display device (100) according to the present disclosure (or can be linked). The wireless communication unit (173) may detect (or recognize) a wearable device capable of communication around the display device (100). Furthermore, if the detected wearable device is an authenticated device to communicate with the display device (100) according to the present disclosure, the control unit (170) may transmit at least a part of the data processed in the display device (100) to the wearable device through the wireless communication unit (173). Accordingly, a user of the wearable device may use the data processed in the display device (100) through the wearable device.

[0070] The voice acquisition unit (175) can acquire audio. The voice acquisition unit (175) can include at least one microphone (not shown) and can acquire audio around the display device (100) through the microphone (not shown).

[0071] The display unit (180) can generate a driving signal by converting a video signal, data signal, OSD signal processed by the control unit (170) or a video signal, data signal, etc. received from the external device interface unit (135) into R, G, B signals, respectively.

[0072] Meanwhile, since the display device (100) illustrated in FIG. 1 is merely an example of the present disclosure, some of the illustrated components may be integrated, added, or omitted depending on the specifications of the display device (100) actually implemented.

[0073] That is, two or more components may be combined into a single component, or a single component may be subdivided into two or more components, as needed. Furthermore, the functions performed by each block are intended to illustrate embodiments of the present disclosure, and their specific operations or devices do not limit the scope of the present disclosure.

[0074] According to another embodiment of the present disclosure, the display device (100) may receive and play back an image through a network interface unit (133) or an external device interface unit (135) without having a tuner (131) and a demodulator (132), unlike as shown in FIG. 1.

[0075] For example, the display device (100) may be implemented separately as an image processing device, such as a set-top box, for receiving broadcast signals or contents according to various network services, and a content playback device for playing contents input from the image processing device.

[0076] In this case, the method of operating the display device according to the embodiment of the present disclosure to be described below may be performed by any one of the display device (100) described with reference to FIG. 1, as well as an image processing device such as a separate set-top box, or a content playback device having a display unit (180) and an audio output unit (185).

[0077] The audio output unit (185) receives a signal processed by the control unit (170) and outputs it as voice.

[0078] The power supply unit (190) supplies power to the entire display device (100). In particular, it can supply power to a control unit (170) that can be implemented in the form of a system on chip (SOC), a display unit (180) for displaying images, and an audio output unit (185) for outputting audio.

[0079] Specifically, the power supply unit (190) may be equipped with a converter that converts AC power into DC power and a dc / dc converter that converts the level of the DC power.

[0080] Next, a remote control device according to an embodiment of the present disclosure will be described with reference to FIGS. 2 and 3.

[0081] FIG. 2 is a block diagram of a remote control device according to an embodiment of the present disclosure, and FIG. 3 shows an example of an actual configuration of a remote control device according to an embodiment of the present disclosure.

[0082] First, referring to FIG. 2, the remote control device (200) may include a fingerprint recognition unit (210), a wireless communication unit (220), a user input unit (230), a sensor unit (240), an output unit (250), a power supply unit (260), a storage unit (270), a control unit (280), and a voice acquisition unit (290).

[0083] Referring to FIG. 2, the wireless communication unit (220) transmits and receives signals with any one of the display devices according to the embodiments of the present disclosure described above.

[0084] The remote control device (200) may be equipped with an RF module (221) capable of transmitting and receiving signals with the display device (100) according to RF communication standards, and may be equipped with an IR module (223) capable of transmitting and receiving signals with the display device (100) according to IR communication standards. In addition, the remote control device (200) may be equipped with a Bluetooth module (225) capable of transmitting and receiving signals with the display device (100) according to Bluetooth communication standards. In addition, the remote control device (200) may be equipped with an NFC module (227) capable of transmitting and receiving signals with the display device (100) according to NFC (Near Field Communication) communication standards, and may be equipped with a WLAN module (229) capable of transmitting and receiving signals with the display device (100) according to WLAN (Wireless LAN) communication standards.

[0085] Additionally, the remote control device (200) transmits a signal containing information about the movement of the remote control device (200) to the display device (100) through the wireless communication unit (220).

[0086] Meanwhile, the remote control device (200) can receive a signal transmitted by the display device (100) through the RF module (221), and, if necessary, can transmit commands for turning the power on / off, changing the channel, changing the volume, etc. to the display device (100) through the IR module (223).

[0087] The user input unit (230) may be configured as a keypad, buttons, a touch pad, or a touch screen. The user can input commands related to the display device (100) to the remote control device (200) by operating the user input unit (230). If the user input unit (230) is equipped with a hard key button, the user can input commands related to the display device (100) to the remote control device (200) by pushing the hard key button. This will be described with reference to FIG. 3.

[0088] Referring to FIG. 3, the remote control device (200) may include a plurality of buttons. The plurality of buttons may include a fingerprint recognition button (212), a power button (231), a home button (232), a live button (233), an external input button (234), a volume control button (235), a voice recognition button (236), a channel change button (237), a confirmation button (238), and a back button (239).

[0089] The fingerprint recognition button (212) may be a button for recognizing a user's fingerprint. In one embodiment, the fingerprint recognition button (212) may be capable of a push operation, and thus may receive a push operation and a fingerprint recognition operation. The power button (231) may be a button for turning the display device (100) on / off. The home button (232) may be a button for moving to the home screen of the display device (100). The live button (233) may be a button for displaying a real-time broadcast program. The external input button (234) may be a button for receiving an external input connected to the display device (100). The volume control button (235) may be a button for adjusting the volume output by the display device (100). The voice recognition button (236) may be a button for receiving a user's voice and recognizing the received voice. The channel change button (237) may be a button for receiving a broadcast signal of a specific broadcast channel. The confirmation button (238) may be a button for selecting a specific function, and the back button (239) may be a button for returning to the previous screen.

[0090] Let's explain Figure 2 again.

[0091] When the user input unit (230) is equipped with a touch screen, the user can input commands related to the display device (100) using the remote control device (200) by touching the soft keys of the touch screen. In addition, the user input unit (230) may be equipped with various types of input devices that can be operated by the user, such as a scroll key or a jog key, and the present embodiment does not limit the scope of the present disclosure.

[0092] The sensor unit (240) may be equipped with a gyro sensor (241) or an acceleration sensor (243), and the gyro sensor (241) may sense information about the movement of the remote control device (200).

[0093] For example, the gyro sensor (241) can sense information about the operation of the remote control device (200) based on the x, y, and z axes, and the acceleration sensor (243) can sense information about the movement speed of the remote control device (200). Meanwhile, the remote control device (200) can further include a distance measuring sensor, so as to sense the distance to the display unit (180) of the display device (100).

[0094] The output unit (250) can output a video or audio signal corresponding to the operation of the user input unit (230) or to a signal transmitted from the display device (100). Through the output unit (250), the user can recognize whether the user input unit (230) is being operated or whether the display device (100) is being controlled.

[0095] For example, the output unit (250) may be equipped with an LED module (251) that lights up when the user input unit (230) is operated or a signal is transmitted and received with the display device (100) through the wireless communication unit (220), a vibration module (253) that generates vibration, a sound output module (255) that outputs sound, or a display module (257) that outputs an image.

[0096] In addition, the power supply unit (260) supplies power to the remote control device (200), and can reduce power waste by stopping the power supply when the remote control device (200) is not moved for a predetermined period of time. The power supply unit (260) can resume the power supply when a predetermined key provided in the remote control device (200) is operated.

[0097] The storage unit (270) can store various types of programs, application data, etc. required for the control or operation of the remote control device (200). If the remote control device (200) wirelessly transmits and receives signals through the display device (100) and the RF module (221), the remote control device (200) and the display device (100) transmit and receive signals through a predetermined frequency band.

[0098] The control unit (280) of the remote control device (200) can store and reference information regarding the frequency band, etc., that can wirelessly transmit and receive signals with the display device (100) paired with the remote control device (200), in the storage unit (270).

[0099] The control unit (280) controls all matters related to the control of the remote control device (200). The control unit (280) can transmit a signal corresponding to a predetermined key operation of the user input unit (230) or a signal corresponding to the movement of the remote control device (200) sensed by the sensor unit (240) to the display device (100) via the wireless communication unit (220).

[0100] Additionally, the voice acquisition unit (290) of the remote control device (200) can acquire voice.

[0101] The voice acquisition unit (290) may include at least one microphone (291) and may acquire voice through the microphone (291).

[0102] Next, Figure 4 is described.

[0103] FIG. 4 shows an example of utilizing a remote control device according to an embodiment of the present disclosure.

[0104] Fig. 4(a) illustrates that a pointer (205) corresponding to a remote control device (200) is displayed on a display unit (180).

[0105] The user can move or rotate the remote control device (200) up and down, left and right. The pointer (205) displayed on the display unit (180) of the display device (100) corresponds to the movement of the remote control device (200). As shown in the drawing, the pointer (205) moves and is displayed according to the movement in 3D space, so the remote control device (200) can be called a space remote control.

[0106] FIG. 4(b) illustrates that when a user moves the remote control device (200) to the left, the pointer (205) displayed on the display unit (180) of the display device (100) also moves to the left in response.

[0107] Information about the movement of the remote control device (200) detected by the sensor of the remote control device (200) is transmitted to the display device (100). The display device (100) can calculate the coordinates of the pointer (205) from the information about the movement of the remote control device (200). The display device (100) can display the pointer (205) to correspond to the calculated coordinates.

[0108] FIG. 4(c) illustrates a case where a user moves the remote control device (200) away from the display unit (180) while pressing a specific button within the remote control device (200). As a result, a selection area within the display unit (180) corresponding to the pointer (205) can be zoomed in and displayed in an enlarged manner.

[0109] Conversely, when the user moves the remote control device (200) closer to the display unit (180), the selection area within the display unit (180) corresponding to the pointer (205) may be zoomed out and displayed in a reduced size.

[0110] Meanwhile, when the remote control device (200) moves away from the display unit (180), the selection area may be zoomed out, and when the remote control device (200) moves closer to the display unit (180), the selection area may be zoomed in.

[0111] In addition, when a specific button within the remote control device (200) is pressed, recognition of up, down, left, and right movements may be excluded. That is, when the remote control device (200) moves away from or toward the display unit (180), up, down, left, and right movements may not be recognized, and only forward and backward movements may be recognized. When a specific button within the remote control device (200) is not pressed, only the pointer (205) moves in accordance with the up, down, left, and right movements of the remote control device (200).

[0112] Meanwhile, the movement speed or movement direction of the pointer (205) can correspond to the movement speed or movement direction of the remote control device (200).

[0113] Meanwhile, the pointer in this specification refers to an object displayed on the display unit (180) in response to the operation of the remote control device (200). Therefore, objects of various shapes other than the arrow shape illustrated in the drawing can be used as the pointer (205). For example, the pointer may be a concept including a point, a cursor, a prompt, a thick outline, etc. In addition, the pointer (205) may be displayed corresponding to one point on the horizontal or vertical axis on the display unit (180), or may be displayed corresponding to multiple points such as lines or surfaces.

[0114] FIG. 5(a) and FIG. 5(b) are drawings for explaining the horizontal mode and vertical mode of a stand-type display device according to an embodiment of the present disclosure.

[0115] Referring to FIG. 5(a) and FIG. 5(b), a stand-type display device (100) is illustrated.

[0116] A shaft (103) and a stand base (105) can be connected to the display device (100).

[0117] The shaft (103) can connect the display device (100) and the stand base (105). The shaft (103) can extend vertically.

[0118] The lower end of the shaft (103) can be connected to the edge of the stand base (105).

[0119] The lower end of the shaft (103) can be rotatably connected to the periphery of the stand base (105).

[0120] The display device (100) and shaft (103) can rotate around a vertical axis with respect to the stand base (105).

[0121] The upper part of the shaft (103) can be connected to the rear of the display device (100).

[0122] The stand base (105) can serve to support the display device (100).

[0123] The display device (100) may be configured to include a shaft (103) and a stand base (105).

[0124] The display device (100) can rotate around the point where the upper part of the shaft (103) and the rear part of the display (180) meet.

[0125] FIG. 5(a) shows that the display (180) operates in a landscape mode in which the horizontal length is greater than the vertical length, and FIG. 5(b) shows that the display (180) operates in a landscape mode in which the vertical length is greater than the horizontal length.

[0126] The user can move the stand-type display device (100). That is, unlike a fixed device, the stand-type display device (100) has improved mobility, so the user is not restricted by the placement location.

[0127] Hereinafter, the present specification discloses a method for eliminating the pressure afterimage phenomenon by forming an airflow passage on the surface of a fabric electrode, thereby eliminating the acoustic sync delay between actual footsteps and footsteps on a user interface provided by a display device (100) during continuous motions such as walking and jogging, thereby increasing the convenience of use for customers.

[0128] To this end, a smart pad including a pressure sensor may utilize fabric electrodes on a surface, but may form airflow passages on at least a portion of the surface.

[0129] In addition, according to the present disclosure, it is an object to provide a display system including a pressure sensor capable of more accurate sensing of pressure by minimizing noise, a smart pad including the pressure sensor, and a display device (100) that communicates with and processes the smart pad.

[0130] FIG. 6 is a schematic diagram of a display system according to one embodiment of the present disclosure.

[0131] Figure 7 is a drawing illustrating the types of pressure sensors.

[0132] Traditional display devices simply received broadcast signals and outputted broadcast programs. However, with the advancement of digital technology and the rise of Over-The-Top (OTT) services, display devices with relatively large screens are increasingly being used to connect to various external devices for content viewing. For example, users can enjoy content from display devices while exercising on a smart pad, as described below.

[0133] Referring to FIG. 6, a display system according to at least one of the various embodiments of the present disclosure may include a smart pad (400) and a display device (100) including a display that processes and outputs a signal obtained from the smart pad (400).

[0134] At this time, the display system may be configured to further include at least one of an image acquisition device (300) and a server (500) depending on the embodiment. However, the image acquisition device (300) and the server (500) may not be essential components.

[0135] The server (500) can replace all or part of the operation or processing of the display device (100).

[0136] The server (500) can obtain a user's pressure signal (or / and a movement signal according to such pressure) from the smart pad (400). The server (500) can transmit the user's pressure signal thus obtained to the display device (100).

[0137] In the above transmission process, the user's pressure signal may be transmitted as raw data to the display device (100). Alternatively, the user's pressure signal may be transmitted to the display device (100) after being preprocessed by the server (500).

[0138] In the above processing process, the server (500) may process the acquired user's pressure signal, analyze the processed signal, and transmit the analysis result or / and additional information (e.g., motion control information, etc.) according to the analysis to the display device (100). In the latter case, the server (500) may transmit a control command generated based on the analyzed result to the display device (100) to control its operation.

[0139] For convenience of explanation, the display system will be described below with a focus on the display device (100) and the smart pad (400).

[0140] Here, the display device (100) can provide content through the screen.

[0141] At this time, the content may include an application, and the application may include an intelligent fit application that provides various functions such as health-related posture measurement and diagnosis.

[0142] In one embodiment, the display device (100) may be, for example, in a state where an intelligent fit application is running in the foreground or background, but is not limited thereto.

[0143] As described above, when an intelligent fit application is running in the foreground or background, the display device (100) can be paired or / and connected with the smart pad (400) and obtain signals containing various information therefrom.

[0144] At least some of the various pieces of information generated or output by the display device (100) and / or server (500) may be transmitted to a terminal (not shown) owned by the user and made available to the user. In this case, it is preferable that the terminal also has the Intelligent Fit application installed, but this is not a limitation.

[0145] From the above perspective, the terminal may also be included as a component of the display system.

[0146] Meanwhile, it is desirable that each component constituting the system be a device that is pre-registered with another component, for example, or at least belongs to the same network and can be connected via a wired / wireless communication protocol.

[0147] In Fig. 6, for convenience, one smart pad (400) is illustrated, but multiple smart pads may be simultaneously connected to one display device (100) to form a display system. In this case, the configuration, performance, version, etc. of each smart pad (400) may or may not be identical.

[0148] The smart pad (400) can sense a pressure signal generated by the user's contact.

[0149] The smart pad (400) may include a pressure sensor to sense a pressure signal.

[0150] Referring to Fig. 7, the pressure sensor may include a resistive pressure sensor and a capacitive pressure sensor, but is not limited thereto.

[0151] Looking at the structure of the resistive pressure sensor, conductive ink may be formed between PEP films, and silver ink may be formed at the bottom of the conductive ink. Meanwhile, spacers may be formed at each of the bottom ends of the conductive ink.

[0152] However, in the case of a resistive pressure sensor, as shown in the graph of Fig. 7, the resistance generated by pressure is dependent on the thickness (R ∝ d), but the thickness of the pressure sensor is thin (typically less than 1 mm) and there is a nonlinear pressure section, making it difficult to accurately sense and derive meaningful data from it.

[0153] Referring to Fig. 7, the structure of the capacitive pressure sensor can sense pressure by obtaining a change in capacitance according to the pressure by using a dielectric material such as foam between an electrode that directly receives pressure and a signal electrode that senses a signal according to the pressure.

[0154] Referring to the graph in Fig. 7, the capacitance can be calculated by dividing the product of the permittivity (ε) of the dielectric material and the area (A) between the electrodes by the spacing (d) between the electrodes (C = εA / d). This capacitance (C) can depend on three-dimensional deformation (volume) due to, for example, pressure.

[0155] However, compared to resistive pressure sensors, these capacitive pressure sensors have the advantage of relatively high sensing accuracy according to pressure because the entire pressure range is linear, and high-resolution imaging (matrix) is possible.

[0156] The pressure sensor of the capacitive structure illustrated in Fig. 7 may include electrodes formed at the upper and lower portions based on the dielectric layer.

[0157] In Fig. 7, when pressure is applied from top to bottom as shown, the upper electrode can be formed as a ground electrode and the lower electrode can be formed as a signal electrode.

[0158] In the case of the pressure sensor of the capacitive structure of Fig. 7, noise approaching from above, that is, in the direction of pressing, can be shielded. However, the pressure sensor of the capacitive structure of Fig. 7 can also sense signals approaching from the side of the pressure sensor (that is, in a direction that does not match the direction of pressing) or noise signals formed from the bottom surface (for example, in the direction opposite to the direction of pressing). Therefore, it may not be easy to obtain only a pure pressure signal by separating it from the signal sensed by the pressure sensor.

[0159] In the present disclosure, as an example, a pressure sensor is a capacitive pressure sensor rather than a resistive pressure sensor, and a pressure sensor / smart pad (400) having a new structure that is an improvement over the pressure sensor of the capacitive structure shown in FIG. 7 is disclosed.

[0160] Hereinafter, embodiments of a pressure sensor or a smart pad (400) including the same according to the present disclosure will be described in more detail with reference to the attached drawings. Although the term "pressure sensor" is used herein, it may also refer to a smart pad (400) depending on the context.

[0161] FIGS. 8 to 9 are drawings illustrating the structure of a pressure sensor included in a smart pad (400) according to one embodiment of the present disclosure.

[0162] FIG. 10 is a graph illustrating the characteristics of a pressure sensor according to an embodiment of the present disclosure.

[0163] FIG. 11 is a drawing illustrating an operation method in a display system according to an embodiment of the present disclosure.

[0164] A pressure sensor (800) constituting a smart pad (400) according to one embodiment of the present disclosure may be configured to include, for example, a plurality of electrodes. Here, the plurality of electrodes may refer to a number greater than the two electrodes of FIG. 7 described above.

[0165] Fig. 8(a) is a cross-sectional view of a pressure sensor (800), and Fig. 8(b) is a perspective view of the pressure sensor (800).

[0166] Referring to FIG. 8(a), a plurality of electrodes included in a pressure sensor (800) according to the present disclosure may include, for example, a first electrode (810), a second electrode (850) formed at a position corresponding to the first electrode (810), and a third electrode (830) formed between the first electrode (810) and the second electrode (850).

[0167] Additionally, the plurality of electrodes included in the pressure sensor (800) according to the present disclosure may further include a fourth electrode (880) formed at one end of the third electrode (830).

[0168] Among the plurality of electrodes included in the pressure sensor (800), a fifth electrode (860, 870) may be further formed to connect one end of the first electrode (810) and one end of the second electrode (850).

[0169] A first dielectric (820) may be included between the first electrode (810) and the third electrode (830). Additionally, a second dielectric (840) may be included between the third electrode (830) and the second electrode (850).

[0170] In the above, the third electrode (830) may be a multi-channel signal electrode. However, the present disclosure is not limited thereto.

[0171] Additionally, in the above, the fourth electrode (880) may be a ground electrode.

[0172] And the fifth electrode (860, 870) can each be brought into contact with the fourth electrode (880) according to the pressure direction.

[0173] At least one of the first electrode (810), the second electrode (850), and the fifth electrode (860, 870) can be formed using an adhesive tape.

[0174] At least one of the first electrode (810), the second electrode (850), and the fifth electrode (860, 870) can be connected to the fourth electrode (880) on the flexible printed circuit board (FPCB).

[0175] Since the fifth electrode (860, 870) is connected to the fourth electrode (880), i.e., the ground, according to the pressure direction, noise unrelated to the pressure direction, for example, a signal formed from the side or bottom, can be eliminated or minimized because it is input to the ground.

[0176] Meanwhile, if the first electrode (810), second electrode (850), and fifth electrode (860, 870) are formed through conductive fabric, they may be integrated electrodes rather than individual electrodes. In this case, the smart pad (400) may be configured to include the pressure sensor of FIG. 8 and other areas that do not include the pressure sensor.

[0177] Alternatively, the smart pad (400) may be formed on the first electrode (810) and the second electrode (850).

[0178] The first electrode (810) is formed of an electrode or conductive fabric, and may be a surface that directly contacts the subject of pressure or a surface to which pressure is initially applied. The first electrode (810) may block noise that may be input from the outside and serve as an electrode in a capacitive structure. This first electrode (810) may be a ground electrode.

[0179] For convenience of explanation in this specification, the first electrode (810), the second electrode (850), and the fifth electrode (860, 870) are described as electrodes that are distinguished according to their positions, but as described above, they may be implemented as an integral body, and for this purpose, a conductive fabric is used, and the conductive fabric may be in a form that entirely wraps the elastic dielectrics (820, 840) and the third electrode (830).

[0180] In the above, even if the conductive fabric is an electrode that entirely wraps around the elastic dielectrics (820, 840) and the third electrode (830) or is in the form of an individual electrode, they can each be a ground electrode or connected to each other through the fourth electrode (880) to prevent noise from entering the third electrode (830) described later.

[0181] The third electrode (830) is a signal electrode and may be a multi-channel signal electrode.

[0182] Additionally, a fourth electrode (880) may be formed at one end of the third electrode (830).

[0183] In this case, as described above, the arrangement relationship between the third electrode (830) and the fourth electrode (880) can be configured in various ways.

[0184] For example, referring to FIG. 8(b), the fourth electrode (880) can be formed between one surface of the third electrode (830) and the first elastic dielectric (820).

[0185] Alternatively, depending on the embodiment, the fourth electrode (880) may be formed between one surface of the third electrode (830) and the second elastic dielectric (840).

[0186] In addition, depending on the embodiment, the fourth electrode (880) may be arranged in parallel with the third electrode (830) as shown in FIG. 9(b) described below.

[0187] Alternatively, depending on the embodiment, it may be configured to be connected to a ground (not shown) formed separately through a conductor from one side of the elastic dielectrics (820, 840) or the third electrode (830).

[0188] Referring to FIG. 9(b), according to one embodiment, a sensing channel may be formed on the third electrode (830) or between the third electrode (830) and the ground, i.e., the fourth electrode (880).

[0189] According to one embodiment of the present disclosure, a plurality of sensing channels may be formed on the third electrode (830). The sensing channels may be formed at predetermined intervals so as not to cause problems in sensing signals according to the expected pressure position or pressure.

[0190] Referring to Fig. 9(b), the sensing channel may be formed at a position corresponding to a position where the distance value changes the most in the first elastic dielectric (820) when pressurized. However, the present invention is not limited thereto.

[0191] The first elastic dielectric (820) is a layer formed of a dielectric material such as foam, and can be formed to have a predetermined distance between the first electrode (810) and the third electrode (or FPCB (Flexible Printed Circuit Board) electrode) (830), i.e., a predetermined thickness or volume.

[0192] The first elastic dielectric (820) can also serve as a kind of spacer.

[0193] When the first elastic dielectric (820) is pressurized, a change in distance may occur between the first electrode (810) and the third electrode (830) depending on the physical change of the foam.

[0194] In this way, the change in distance between the first electrode (810) and the third electrode (830) due to the physical change of the first elastic dielectric (820) may ultimately cause a change in capacitance (C).

[0195] As the distance between the first electrode (810) and the third electrode (830) decreases, the capacitance (C) increases.

[0196] The quantitative analysis principle based on the change in capacitance based on this change in distance can ultimately be replaced by a pressure signal.

[0197] As described above, the pressure signal produced in this way is a pressure signal according to pure pressure or is close to it because noise is removed from the first electrode (810) by insulation, i.e., ground.

[0198] Meanwhile, the second elastic dielectric (840) may also be composed of a dielectric material such as foam, and may form a distance between the second electrode (850) and the third electrode (830), and may allow the formed distance to be maintained.

[0199] In other words, the second elastic dielectric (840) may be configured so that a physical change occurs only when the pressure is above a threshold pressure. Here, the threshold pressure may be set according to a setting. For example, the threshold pressure may be set to about 3 kgf / cm² or more. However, the present disclosure is not limited to the above value.

[0200] The first elastic dielectric (820) and the second elastic dielectric (840) may or may not be formed of the same material.

[0201] The thicknesses of the first elastic dielectric (820) and the second elastic dielectric (840) may be the same or different.

[0202] The elastic or physical change rates of the first elastic dielectric (820) and the second elastic dielectric (840) may be the same or different.

[0203] According to an embodiment, the first elastic dielectric (820) formed between the third electrode (830) and the first electrode (810) may be formed in multiple layers.

[0204] According to an embodiment, the second elastic dielectric (840) formed between the third electrode (830) and the second electrode (850) may be formed in multiple layers.

[0205] According to an embodiment, both the first elastic dielectric (820) and the second elastic dielectric (840) may be formed of multiple layers.

[0206] In the above, when formed in multiple layers, the materials of each layer may or may not be the same.

[0207] The first elastic dielectric (820) may not form a single layer as a whole, but may form a single layer with a plurality of distinct sections.

[0208] The second elastic dielectric (840) may not form a single layer as a whole, but may form a single layer with a plurality of distinct sections.

[0209] The third electrode (830) may form one layer with one electrode, but may also be separated and multiple third electrodes may form one electrode layer.

[0210] Fig. 9(a) illustrates the basic structure of a capacitor, and Fig. 9(b) illustrates the structure according to the present disclosure.

[0211] Referring to Fig. 9(a), a dielectric (insulator) is placed between the electrodes, and in this case, the capacitance is determined as the product of the dielectric constant and the area (A) divided by the distance (d) ((C = ε*(A / d)).

[0212] On the other hand, referring to FIG. 9(b), the structure of the third electrode (830) may be such that a signal electrode (xN) is placed in the first region and a ground electrode is placed in the second region.

[0213] At this time, a region with a separate insulating material applied thereto may be formed between the first region and the second region. This region may enable the first region and the second region to be electrically isolated.

[0214] Referring to Fig. 9(b), the first electrode layer (810) and the first elastic dielectric (820), which were flat before pressurization, move by a distance (Δd) in the pressurization direction.

[0215] Referring to Fig. 9(b), the distance (Δd) that the first electrode layer (810) and the first elastic dielectric (820) move in the pressing direction may differ depending on the pressing strength.

[0216] In this case, the distance value adopted by the sensing channel may differ depending on the location of the sensing channel.

[0217] Alternatively, the value with the largest distance change value (Δd) may be adopted regardless of the location of the sensing channel.

[0218] As described above, this distance change value (Δd) ultimately results in a change in capacitance between the signal electrodes (xN), and a pressure signal can be generated or extracted based on this change in capacitance.

[0219] FIG. 10 is a graph illustrating the characteristics of a pressure sensor (800), particularly a first elastic dielectric (820) and a second elastic dielectric (840), in relation to the present disclosure.

[0220] In the present disclosure, the elastic dielectric may be of the polyurethane foam type. However, the present disclosure is not limited thereto.

[0221] In the present disclosure, it is preferable that the first elastic dielectric (820) be formed as a soft type so as to well reflect the change in distance according to pressure.

[0222] Examples of such soft-type elastic dielectrics include GMC-S, which has low density and low elastic modulus, excellent softness and sealing properties, low deformation, and good shock absorption. However, this is merely an example, and the present disclosure is not limited thereto.

[0223] In the present disclosure, the second elastic dielectric (840) can be formed as a hard type.

[0224] Examples of such hard-type elastic dielectrics include GMC-HH, a hard-type material with excellent physical strength and vibration absorption properties and excellent elastic resilience. However, this is merely an example, and the present disclosure is not limited thereto.

[0225] In relation to the selection of the material sensitivity range of the elastic dielectric, the first elastic dielectric (820) is, for example, 0.2 g / cm 3 It is desirable to select a soft type material of less than 0.4 g / cm. And the second elastic dielectric (840) is, for example, 0.4 g / cm 3 It is desirable to select a hard type material that is excessive. However, the present disclosure is not limited to the above-mentioned values.

[0226] The thickness of the first elastic dielectric (820) and the second elastic dielectric (840) may or may not be the same. However, the thickness may be about 50 μm, but this is only an example and is not limited thereto.

[0227] Referring to the graph of FIG. 10, the second elastic dielectric (840) in particular can prevent saturation of the pressure curve by starting to experience physical changes upon pressurization from the aforementioned critical pressure. In other words, the second elastic dielectric (840) can expand the pressure range.

[0228] The pressure sensor (800) according to the present disclosure is intended to improve pressure accuracy through noise blocking on at least two sides.

[0229] The capacitive pressure sensor (800) according to the present disclosure described above can generate a signal when a person physically touches or approaches the sensor. However, the pressure sensor (800) according to the present disclosure is configured so that the sensor responds only to physical pressure to ensure stable operation.

[0230] In this way, even when the sensor is made to respond only to physical pressure, the contact / proximity noise signal, etc. can be excluded to sense only the desired pressure signal, for example, the pure pressure signal value.

[0231] For example, a signal may already be generated at the moment when a user's hand approaches and touches the sensor before applying pressure to the pressure sensor (800). In this case, since two or more signals (e.g., proximity + contact + pressure) are received together, it may not be easy to distinguish and extract a pure pressure signal therefrom.

[0232] Accordingly, according to the above-described disclosure, even when contact / proximity noise of the user's body or electrical noise (EMI (Electromagnetic Interference), ESD (Electro Static Discharge), etc.) applied sporadically from the outside occurs, it is possible to resolve the problem.

[0233] Additionally, according to at least one of the various embodiments of the present disclosure, the sensing pressure range of the pressure sensor can be variously adjusted or expanded through a density combination of the elastic dielectrics of the first elastic dielectric (820) and the second elastic dielectric (840).

[0234] The pressure sensor (800) according to the present disclosure can form a single electrode on the entire upper surface (810) and lower surface (820). It is preferable that the pressure sensor (800) according to the present disclosure has electrodes formed on at least two surfaces.

[0235] And as mentioned above, an additional electrode, i.e., a fifth electrode (860, 870), can be formed on the side as well. At this time, the fifth electrode can be configured to be connected to a single ground electrode (880) by shorting the upper and lower electrodes (810, 850) by contacting them with a conductive tape having a predetermined thickness (e.g., about 5 cm or more). However, the present disclosure is not limited to the above figures.

[0236] Through this, according to the present disclosure, the noise signal source can be blocked from the sensor by covering the entire surface with the ground electrode (880) regardless of the input direction, thereby sensing only the pure pressure signal.

[0237] In other words, all or at least one of the first electrode (810), the second electrode (850), and the fifth electrode (860, 870) can be formed as a ground electrode.

[0238] The first elastic dielectric (820) may adopt a low-density, sensitive material so as to be able to cause physical changes, while the second elastic dielectric (840) may adopt a high-density material so as to be relatively insensitive to physical changes.

[0239] Additionally, the second elastic dielectric (840) may function as a spacer between the second electrode (850) and may bring about additional changes in physical properties at high pressures above the critical pressure.

[0240] As described above, according to at least one of the various embodiments of the present disclosure, accurate pressure information with noise removed can be provided to a user, information on accurate pressure distribution can be provided by configuring a multi-channel high-resolution pressure sensor, and the pressure sensor can be protected in response to external events such as static electricity, thereby contributing to improvement of product lifespan and reliability, and a rigid pressure sensor structure can be secured by configuring a smart pad by applying a double-sided conductive fabric on the upper / lower surfaces.

[0241] FIGS. 11 to 13 are drawings illustrating the structure and signal characteristics of a pressure sensor according to an embodiment of the present disclosure.

[0242] FIGS. 14 and 15 are drawings illustrating the structure and signal characteristics of a pressure sensor according to another embodiment of the present disclosure.

[0243] FIG. 16 is a drawing illustrating an example of an air flow passage formed in a pressure sensor according to one embodiment of the present disclosure.

[0244] Fig. 17 is a drawing illustrating an example of a planar circuit diagram of the pressure sensor of Fig. 14.

[0245] Fig. 18 is a graph illustrating signal characteristics according to the pressure sensor of Fig. 11.

[0246] Fig. 19 is a graph illustrating signal characteristics according to the pressure sensor of Fig. 14.

[0247] In Fig. 11, only a part of the pressure sensor (800), for example, the first electrode (810), the third electrode (830), and the first elastic dielectric (820) are shown.

[0248] FIG. 14 illustrates the surface of a pressure sensor (800) or a smart pad (400), i.e., the surface of the first electrode, and is an example in which the first electrode (810') uses a fabric electrode.

[0249] Meanwhile, Fig. 13 is a graph of the signal characteristics of the pressure sensor (800) of Fig. 11, showing the signal characteristics at a point in time (t) when the applied pressure is removed after pressurization and after the point in time t. Referring to Fig. 13, it can be seen that a large amount of residual images (1110) remain at the point in time (t) when the pressure is removed.

[0250] For example, if another pressure signal is input within a critical time after time t, the aforementioned residual signal (1110) may cause an error. For example, referring to FIG. 18, if the pressure is continuous (left foot, right foot, left foot, right foot, etc.), the residual signal (1110) may affect other pressure signals. In this case, there is a concern that at least one of the smart pad (400), the server (500), or the display device (100) may incorrectly recognize the time at which each pressure signal is input.

[0251] Accordingly, in FIG. 14, the structure of a pressure sensor (800) / smart pad (400) according to another embodiment of the present disclosure is disclosed. Although the structure is similar to that of FIG. 11, it can be seen that one or more air flow passages (1210) are formed in the pressure sensor (800) of FIG. 14. This may be for example to improve or accelerate the air flow speed within the air flow passages (1210), particularly within the dielectric, thereby improving the elasticity or recovery speed of the material, thereby eliminating the afterimage phenomenon as illustrated in FIG. 15 or FIG. 19.

[0252] In FIG. 14, for example, two air flow passages (1210) are illustrated.

[0253] At this time, the air flow passages (1210) may be formed to extend from the first electrode (810') to the first elastic dielectric (820) in a direction in which pressure is applied to a predefined depth, for example.

[0254] In other words, the air flow passages (1210) can be formed from the first elastic dielectric (820) at a predetermined depth toward the first electrode (810') so that air of the first elastic dielectric (820) can escape in the direction opposite to the direction in which the pressure is applied, for example.

[0255] As described above, the depths of the air flow passages (1210) may be different from each other. By making the depths of the air flow passages (1210) different, the flow of air within the first elastic dielectric (820) can be controlled according to the strength or direction of the pressure.

[0256] Meanwhile, the spacing between the plurality of airflow passages (1210) may or may not be constant. This may be affected, for example, by the location and number of sensing channels formed on the third electrode (830).

[0257] For example, it is preferable that an air flow passage is not formed in an area that overlaps the first electrode (810') in the vertical direction in the sensing channel on the third electrode (830). This is because, if an air flow passage is formed in the vertical direction of the sensing channel, it may affect the strength or direction of the pressure. Therefore, in order to sense more accurate pressure, it is preferable to form an air flow passage in an area that does not overlap the sensing channel.

[0258] Meanwhile, in the case where an area or a sensing channel area that is mainly pressed by the user is preset on the smart pad (400), it is preferable to form at least one air flow passage in an area that does not overlap with the area.

[0259] In Fig. 14, the lines within the first elastic dielectric (820) represent examples of air flow.

[0260] In this way, when at least one air flow passage (1210) is formed within the pressure sensor (800), it can be seen that the residual signal (1220) is significantly reduced compared to FIG. 13 described above after the point in time (t) when the pressure is released, as shown in FIG. 15.

[0261] Accordingly, in the case of a pressure sensor-based smart pad (400) having an air flow passage as shown in Fig. 14, the user's movement (e.g., footwork) can be sensed more accurately.

[0262] FIGS. 16(a) to 16(d) illustrate a method for forming an air flow passage (1210) according to the present disclosure.

[0263] In the case of Fig. 16(a), the first electrode (810') is formed as a porous fabric electrode having a plurality of air flow passages. In this case, depending on the embodiment, the air flow passages may not extend in the direction of the first elastic dielectric (820). However, this is not limited thereto.

[0264] In the case of Fig. 16(b), a first electrode (810') using fabric is shown, and in this case, an air flow passage (1210) formed in a cut manner of a predetermined length at a predetermined position is shown.

[0265] In Fig. 16(b), since the cut is made to a predetermined length, it is advantageous from the perspective of a passage through which air can flow well, but since the cut air flow passage may be contaminated due to the user's movement, it is desirable to select and adopt an optimal length.

[0266] Meanwhile, FIGS. 16(a) and 16(b) may be combined and included within a single smart pad (400). In this case, the arrangement and number of airflow passages according to each method may be appropriately determined. For example, a method such as FIG. 16(a) may be applied to a central area on the smart pad (400) where there is a relatively high probability of pressure or user contact, and a method such as FIG. 16(b) may be adopted as the probability decreases or the area approaches the edge. However, this is merely an example, and the present disclosure is not limited thereto.

[0267] Fig. 16(c) illustrates an example of forming an airflow passage (1210) by removing at least one specific area. In this case, the cut area may be larger than the cutting method of Fig. 16(b) described above, but air can be discharged better. However, if the cut area is too large or close to the sensing channel, there is a possibility of pressure sensing errors due to pressurization. Therefore, it is preferable to determine the area to be cut and the size of the cut by comprehensively considering the distance from the sensing channel, the placement area, etc.

[0268] Meanwhile, FIGS. 16(a) to 16(c) may be combined and included in a single smart pad (400). In this case, the arrangement and number of airflow passages according to each method may be appropriately determined. For example, a method such as FIG. 16(a) may be applied to a central area on the smart pad (400) where there is a relatively high probability of pressure or user contact, and methods such as FIGS. 16(b) to 16(c) may be adopted as the probability decreases or the area approaches the edge. However, this is merely an example, and the present disclosure is not limited thereto.

[0269] In Fig. 16(d), at least one airflow passage (1210) may be formed by a perforation method. At this time, the number, location, size, etc. of the airflow passages (1210) formed by the perforation may be determined experimentally in a manner that allows air to flow smoothly while accurately sensing the pressure intensity. According to an embodiment, the airflow passages (1210) may be arranged such that a sensing channel is positioned between each perforation. However, the present disclosure is not limited thereto.

[0270] In addition, FIGS. 16(a) to 16(d) may be combined and included in a single smart pad (400). In this case, the arrangement, number, etc. of airflow passages according to each method may be appropriately determined. For example, a method such as FIG. 16(a) may be applied to a central area on the smart pad (400) where there is a relatively high probability of pressure or user contact, and methods such as FIGS. 16(b) to 16(d) may be adopted as the probability decreases or the area approaches the edge. However, this is merely an example, and the present disclosure is not limited thereto.

[0271] Although not shown in Figures 16(a) to 16(d), various shapes or materials related to a structure for allowing air of an elastic dielectric to flow out to the outside, such as a strip shape, may be referenced in the present disclosure.

[0272] According to one embodiment, the depth of the airflow passage may be 0.1 to 5 mm, preferably 0.1 to 3 mm. However, the present disclosure is not limited thereto. Meanwhile, the depth may represent the depth from the first electrode (810'). Alternatively, the depth may represent the depth from the first elastic dielectric (820).

[0273] In one embodiment, the size of the airflow passage may be 0.1 to 50 mm, but preferably 0.1 to 20 mm. However, the present disclosure is not limited thereto. In the above, the size of the passage may be determined, for example, with reference to the distance between sensing channels.

[0274] In Fig. 17, for example, a circuit diagram of a smart pad (400) including a pressure sensor (800) according to Fig. 14 is illustrated.

[0275] In Fig. 17, it can be seen that a signal electrode (830) including sensing channels is arranged according to the design on a smart pad (400), and an air flow passage (1210) is arranged around the signal electrode (830) (or sensing channel).

[0276] Meanwhile, in the circuit design diagram of Fig. 17, the remaining area excluding the area where the signal electrode (830) is placed may represent a ground area.

[0277] As described above, FIG. 18 may be a graph showing the characteristics of a smart pad signal according to FIG. 11.

[0278] Referring to the graph of Fig. 18, signals corresponding to the left foot, right foot, left foot, right foot, etc. can be continuously sensed and acquired according to the pressure signal.

[0279] However, as shown in FIGS. 13 and 18, when a signal is pressed by one of the user's feet, the signal rises to a peak according to the pressure intensity, and when the pressure of the corresponding foot is released and a signal according to the pressure intensity of the next foot is input, if there is a lot of noise (1110) in the signal and the pressure is not sufficient (for example, a pressure of a certain intensity), it is very difficult to distinguish whether this is a signal of a new foot according to the pressure or residual noise of the previous foot.

[0280] Accordingly, as shown in the graph of Fig. 19, by providing an air flow passage (1210) on the smart pad (400) according to the method of Fig. 14, the residual noise (1220) is drastically reduced, and it is possible to sense not only a pressure intensity signal above a preset threshold but also a pressure intensity below the threshold by distinguishing them.

[0281] Therefore, even in cases where the pressure is relatively low, such as in the case of children or the elderly, the footstep signal can be accurately separated and detected, and analysis results can be derived therefrom.

[0282] In addition, because it is possible to sense and distinguish even small pressures, the degree of pressure change can also be analyzed more accurately.

[0283] Comparing FIGS. 18 and 19, it can be seen that the maximum pressure signal level (1610) of FIG. 19 is greater than the maximum pressure signal level (1510) of FIG. 18. This may indicate that the strength of the pressure that can be accommodated in the elastic dielectric can be expanded depending on the provision of the air flow passage (1210).

[0284] Meanwhile, although not illustrated, the airflow passage may not necessarily be limited to the pressure direction, as illustrated in FIG. 14. For example, unlike the example illustrated in FIG. 14, the airflow passage may be provided in an oblique shape with a predetermined incline. In this case, the constraints on its arrangement may be relatively less severe than those illustrated in FIG. 14.

[0285] Alternatively, the air flow passage may be implemented in a form that is aligned with the pressing direction on the first electrode (810') as illustrated in FIG. 14, but is not necessarily a straight line on the first elastic dielectric (820) but has at least one bend. In that case, the air flow passage on the first elastic dielectric (820) may not necessarily have the same size (width) as the air flow passage on the first electrode (810').

[0286] Even if not specifically mentioned, the order of at least some of the operations disclosed in the present disclosure may be performed simultaneously, in a different order than the order described above, or some may be omitted / added.

[0287] According to one embodiment of the present disclosure, the above-described method can be implemented as processor-readable code on a medium in which a program is recorded. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices.

[0288] The display device described above is not limited to the configuration and method of the embodiments described above, and the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

[0289] The present disclosure relates to a display system that accurately senses a user's movement through a smart pad with improved sensing accuracy and provides a service based on the movement. The display system can be utilized in various devices or systems including a pressure sensor, and thus has industrial applicability.

Claims

1. The first electrode, and A second electrode including a sensing channel, A pressure sensor including a first elastic dielectric disposed between the first electrode and the second electrode, The first electrode of the above pressure sensor has at least one air flow passage formed therein. Smart pad.

2. In claim 1, The above pressure sensor, Further comprising a third electrode formed at a position corresponding to the first electrode; Smart pad.

3. In claim 2, The above pressure sensor, Further comprising a second elastic dielectric disposed between the second electrode and the third electrode. Smart pad.

4. In claim 1, At least one of the above airflow passages, formed so as to extend from the first electrode to the first elastic dielectric in the direction of pressure by a predefined depth, Smart pad.

5. In claim 4, Each of the above airflow passages, The above extended depths are different from each other, Smart pad.

6. In claim 1, The first electrode is formed as a porous fabric electrode having at least one air flow passage formed therein. Smart pad.

7. In claim 1, At least one of the above airflow passages, When the first electrode is formed as a fabric electrode, it is formed by cutting, removing a specific area, or punching. Smart pad.

8. The first electrode, and A second electrode including a sensing channel, A smart pad including a pressure sensor including a first elastic dielectric disposed between the first electrode and the second electrode; and Including a display device, The first electrode of the above pressure sensor has at least one air flow passage formed therein. Display system.

9. In claim 8, The above pressure sensor, Further comprising a third electrode formed at a position corresponding to the first electrode; Display system.

10. In claim 9, The above pressure sensor, Further comprising a second elastic dielectric disposed between the second electrode and the third electrode. Display system.

11. In claim 8, At least one of the above airflow passages, formed so as to extend from the first electrode to the first elastic dielectric in the direction of pressure by a predefined depth, Display system.

12. In claim 11, Each of the above airflow passages, The above extended depths are different from each other, Display system.

13. In claim 8, The first electrode is formed as a porous fabric electrode having at least one air flow passage formed therein. Display system.

14. In claim 8, At least one of the above airflow passages, When the first electrode is formed as a fabric electrode, it is formed by cutting, removing a specific area, or punching. Display system.

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