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WO2019107889A1 - Dispositif d'entrée tactile pour détecter une pression appliquée à une surface latérale - Google Patents

Dispositif d'entrée tactile pour détecter une pression appliquée à une surface latérale Download PDF

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Publication number
WO2019107889A1
WO2019107889A1 PCT/KR2018/014757 KR2018014757W WO2019107889A1 WO 2019107889 A1 WO2019107889 A1 WO 2019107889A1 KR 2018014757 W KR2018014757 W KR 2018014757W WO 2019107889 A1 WO2019107889 A1 WO 2019107889A1
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WIPO (PCT)
Prior art keywords
touch
display panel
touch input
input device
pressure
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/014757
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English (en)
Korean (ko)
Inventor
김세엽
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Hideep Inc
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Hideep Inc
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Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0447—Position sensing using the local deformation of sensor cells
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present invention relates to a touch input device for sensing a pressure applied to a side surface, and more particularly, to a touch input device for sensing a pressure applied to a side surface by using a pressure sensor for detecting a touch pressure, ≪ / RTI >
  • an input device such as a button, a key, a joystick, and a touch screen is used. Due to the easy and simple operation of the touch screen, the use of the touch screen in the operation of the computing system is increasing.
  • the touch screen may comprise a touch surface of a touch input device including a touch sensor panel, which may be a transparent panel having a touch-sensitive surface.
  • a touch input device may be attached to the front of the display screen such that the touch-sensitive surface covers the visible surface of the display screen.
  • the user simply touches the touch screen with a finger or the like so that the user can operate the computing system.
  • a computing system is able to recognize touch and touch locations on a touch screen and interpret the touch to perform operations accordingly.
  • the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to detect the magnitude of a pressure applied to a side surface of a touch input device using a front sensor without separately providing a side sensor.
  • the touch input device includes at least a cover layer on the front surface, a pressure sensor disposed horizontally with the cover layer for detecting touch pressure, And a control unit for sensing a pressure applied to the side surface.
  • the present invention it is possible to detect the magnitude of the pressure applied to the side surface of the touch input apparatus by using the front sensor without separately providing the side sensor.
  • FIGS. 1A and 1B are schematic diagrams of a capacitive touch sensor included in a touch input device according to an embodiment of the present invention and a configuration thereof for operation thereof.
  • FIG. 2 illustrates a control block for controlling a touch position, a touch pressure, and a display operation in the touch input device according to the embodiment of the present invention.
  • 3A and 3B are conceptual diagrams for explaining a configuration of a display module in a touch input device according to an embodiment of the present invention.
  • FIG. 4A to 4E illustrate an example in which a pressure sensor is formed in a touch input device according to an embodiment of the present invention.
  • 5A to 5C are cross-sectional views illustrating an embodiment of a pressure sensor formed directly on various display panels of a touch input device according to an embodiment of the present invention.
  • 6A to 6F are cross-sectional views of a touch input device showing a layout relationship between a pressure sensor and a light shielding layer according to an embodiment of the present invention.
  • FIG. 7 is a perspective view showing a first embodiment of a touch input device according to the present invention.
  • FIG. 8A to 8F are sectional views of the touch input device of Fig.
  • FIG. 9 is a perspective view showing a second embodiment of the touch input device according to the present invention.
  • 10A to 10I are sectional views of the touch input device of Fig.
  • 11 is a view referred to to show that the shape of the touch input device is changed differently depending on the position of pressing the side surface of the touch input device.
  • 12A to 12D are views illustrating the shape of electrodes included in the touch input device according to the present invention.
  • FIG. 13 is a view showing a case where the pressure sensor according to the embodiment of the present invention is a strain gauge.
  • FIG. 1A is a schematic diagram of a touch sensor 10 of a capacitive type included in a touch input device according to an embodiment of the present invention and a configuration thereof for operation thereof.
  • the touch sensor 10 includes a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm.
  • the touch sensor 10 includes a plurality of driving electrodes And a plurality of receiving electrodes RX1 to RXm for receiving a sensing signal including information on a capacitance change amount that changes in accordance with a touch on a touch surface, And a sensing unit 11 for sensing a touch position.
  • the touch sensor 10 may include a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm.
  • a plurality of driving electrodes TX1 to TXn and a plurality of receiving electrodes RX1 to RXm of the touch sensor 10 are shown as an orthogonal array.
  • the electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm can have any number of dimensions including the diagonal, concentric and three-dimensional random arrangement, and the like and their application arrangements.
  • n and m are positive integers and may be the same or different from each other, and the size may be changed according to the embodiment.
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be arranged to cross each other.
  • the driving electrode TX includes a plurality of driving electrodes TX1 to TXn extending in a first axis direction and a receiving electrode RX includes a plurality of receiving electrodes extending in a second axis direction intersecting the first axis direction RX1 to RXm).
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm are formed in the same layer .
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on a top surface of a display panel 200A to be described later.
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed in different layers.
  • one of the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm may be formed on the upper surface of the display panel 200A and the other may be formed on the lower surface of the cover, (200A).
  • the plurality of driving electrodes TX1 to TXn and the plurality of receiving electrodes RX1 to RXm are formed of ITO (indium tin oxide) or ATO (tin oxide), which is made of a transparent conductive material (for example, tin oxide (SnO2) (Antimony Tin Oxide)) or the like.
  • a transparent conductive material for example, tin oxide (SnO2) (Antimony Tin Oxide)
  • the driving electrode TX and the receiving electrode RX may be formed of another transparent conductive material or an opaque conductive material.
  • the driving electrode TX and the receiving electrode RX may include at least one of silver ink, copper, nano silver, and carbon nanotube (CNT) .
  • the driving electrode TX and the receiving electrode RX may be realized by a metal mesh.
  • the driving unit 12 can apply a driving signal to the driving electrodes TX1 to TXn.
  • the driving signal may be sequentially applied to one driving electrode at a time from the first driving electrode TX1 to the nth driving electrode TXn. This application of the driving signal can be repeated again.
  • driving signals may be simultaneously applied to a plurality of driving electrodes according to an embodiment.
  • the sensing unit 11 acquires information on the electrostatic capacitance Cm generated between the driving electrodes TX1 to TXn and the receiving electrodes RX1 to RXm to which the driving signal is applied through the receiving electrodes RX1 to RXm And the touch position and the touch position can be detected by receiving the sensing signal.
  • the sensing signal may be a signal in which a driving signal applied to the driving electrode TX is coupled by a capacitance Cm: 14 generated between the driving electrode TX and the receiving electrode RX.
  • the process of sensing the driving signal applied from the first driving electrode TX1 to the nth driving electrode TXn through the receiving electrodes RX1 to RXm may be referred to as scanning the touch sensor 10 .
  • the sensing unit 11 may include a receiver (not shown) connected to each of the reception electrodes RX1 to RXm through a switch.
  • the switch is turned on during a period of sensing the signal of the corresponding receiving electrode RX so that a sensing signal can be sensed from the receiving electrode RX at the receiver.
  • the receiver may be comprised of an amplifier (not shown) and a feedback capacitor coupled between the negative input of the amplifier and the output of the amplifier, i. E., The feedback path. At this time, the positive input terminal of the amplifier may be connected to the ground.
  • the receiver may further include a reset switch connected in parallel with the feedback capacitor. The reset switch can reset the conversion from current to voltage performed by the receiver.
  • a negative input terminal of the amplifier may be connected to the corresponding receiving electrode RX to receive a current signal including information on the capacitance Cm, and integrate the current signal to convert the voltage into a voltage.
  • the sensing unit 11 may further include an analog-to-digital converter (ADC) for converting the integrated data to digital data through the receiver. The digital data may then be input to a processor (not shown) and processed to obtain touch information for the touch sensor 10.
  • ADC analog-to-digital converter
  • the sensing unit 11 may be configured to include an ADC and a processor together with a receiver.
  • the control unit 13 may perform a function of controlling the operation of the driving unit 12 and the sensing unit 11.
  • the controller 13 may generate a driving control signal and transmit the driving control signal to the driving unit 12 so that the driving signal is applied to the driving electrode TX predetermined at a predetermined time.
  • the control unit 13 generates a sensing control signal and transmits the sensing control signal to the sensing unit 11 so that the sensing unit 11 receives a sensing signal from the sensing electrode RX previously set at a predetermined time to perform a predetermined function can do.
  • the driving unit 12 and the sensing unit 11 may constitute a touch detection device (not shown) capable of detecting whether or not to touch the touch sensor 10 and a touch position.
  • the touch detection apparatus may further include a control section (13).
  • the touch detection device may be integrated on a touch sensing integrated circuit (IC) corresponding to the touch sensor controller 1100 to be described later in the touch input device including the touch sensor 10.
  • the driving electrode TX and the receiving electrode RX included in the touch sensor 10 are included in the touch sensing IC through a conductive trace and / or a conductive pattern printed on a circuit board And may be connected to the driving unit 12 and the sensing unit 11.
  • the touch sensing IC may be placed on a circuit board on which a conductive pattern is printed, for example, a touch circuit board (hereinafter referred to as a touch PCB) in Figs. 6A to 6F.
  • a touch PCB a touch circuit board
  • the touch sensing IC may be mounted on a main board for operating the touch input device.
  • a capacitance Cm of a predetermined value is generated at each intersection of the driving electrode TX and the reception electrode RX.
  • the capacitance may represent mutual capacitance (Cm).
  • the sensing unit 11 senses such electrical characteristics and can detect whether the touch sensor 10 is touched and / or touched. For example, it is possible to detect the touch and / or the position of the touch on the surface of the touch sensor 10 having the two-dimensional plane including the first axis and the second axis.
  • the position of the touch in the second axial direction can be detected by detecting the drive electrode TX to which the drive signal is applied when a touch to the touch sensor 10 occurs.
  • the position of the touch in the first axis direction can be detected by detecting the capacitance change from the received signal received through the receiving electrode RX when touching the touch sensor 10.
  • the operation of the touch sensor 10 for sensing the touch position has been described based on the amount of mutual capacitance change between the driving electrode TX and the receiving electrode RX, but the present invention is not limited to this. That is, as shown in FIG. 1B, it is also possible to sense the touch position based on the amount of change in the self-capacitance.
  • FIG. 1B is a schematic view for explaining still another capacitive touch sensor 10 included in the touch input device according to another embodiment of the present invention and its operation.
  • a plurality of touch electrodes 30 are provided in the touch sensor 10 shown in FIG.
  • the plurality of touch electrodes 30 may be arranged in a lattice pattern at regular intervals as shown in FIG. 12D, but the present invention is not limited thereto.
  • the drive control signal generated by the control unit 13 is transmitted to the drive unit 12 and the drive unit 12 applies a drive signal to the touch electrode 30 preset at a predetermined time based on the drive control signal.
  • the sensing control signal generated by the control unit 13 is transmitted to the sensing unit 11.
  • the sensing unit 11 senses the sensing signal from the touch electrode 30 preset at a predetermined time Receive input. At this time, the sensing signal may be a signal for the amount of change in self-capacitance formed on the touch electrode 30.
  • the driving unit 12 and the sensing unit 11 are divided into separate blocks for the sake of convenience, the operation of applying the driving signal to the touch electrode 30 and the sensing signal from the touch electrode 30 May be performed by one driving and sensing unit.
  • the touch sensor 10 for detecting whether or not the touch input device 1000 touches the touch input device 1000 A surface acoustic wave (SAW), an infrared (IR) system, an optical imaging system, a dispersion signal system, A dispersive signal technology, and an acoustic pulse recognition method.
  • SAW surface acoustic wave
  • IR infrared
  • optical imaging system a dispersion signal system
  • dispersive signal technology A acoustic pulse recognition method.
  • FIG. 2 illustrates a control block for controlling a touch position, a touch pressure, and a display operation in the touch input device according to the embodiment of the present invention.
  • the control block includes a touch sensor controller 1100 for detecting the touch position, a display controller (not shown) for driving the display panel And a pressure sensor controller 1300 for detecting the pressure.
  • the display controller 1200 receives input from a central processing unit (CPU) or an application processor (CPU), which is a central processing unit on the main board for operating the touch input apparatus 1000, And a control circuit for displaying desired contents.
  • CPU central processing unit
  • CPU application processor
  • Such a control circuit can be mounted on a display circuit board (hereinafter referred to as a display PCB).
  • a control circuit may include a display panel control IC, a graphic controller IC, and other circuits necessary for operation of the display panel 200A.
  • the pressure sensor controller 1300 for detecting the pressure through the pressure sensing unit may be configured similar to the touch sensor controller 1100 to operate similar to the touch sensor controller 1100.
  • the pressure sensor controller 1300 includes a driving unit, a sensing unit, and a control unit, as shown in FIGS. 1A and 1B, and can detect the magnitude of pressure by sensing signals sensed by the sensing unit.
  • the pressure sensor controller 1300 may be mounted on the touch PCB on which the touch sensor controller 1100 is mounted or on the display PCB on which the display controller 1200 is mounted.
  • the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300 may be included in the touch input device 1000 as different components.
  • the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300 may be formed of different chips.
  • the processor 1500 of the touch input apparatus 1000 may function as a host processor for the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300.
  • the touch input device 1000 may be applied to various devices such as a cell phone, a PDA (Personal Data Assistant), a smartphone, a tablet PC, an MP3 player, a notebook, An electronic device including the same display screen and / or a touch screen.
  • a cell phone a PDA (Personal Data Assistant)
  • a smartphone a tablet PC
  • an MP3 player a notebook
  • An electronic device including the same display screen and / or a touch screen.
  • the touch sensor controller 1100, the display controller 1200, and the pressure sensor controller 1300 which are separately configured as described above, to make the touch input apparatus 1000 thin and light weight, May be integrated into one or more configurations in accordance with an embodiment. In addition, it is also possible that these respective controllers are integrated in the processor 1500. In addition, according to the embodiment, the touch sensor 10 and / or the pressure sensing unit may be incorporated in the display panel 200A.
  • the touch sensor 10 for detecting a touch position in the touch input apparatus 1000 according to the embodiment may be located outside or inside the display panel 200A.
  • the display panel 200A of the touch input device 1000 according to the embodiment may be a display device including a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED) Display panel. Accordingly, the user can perform an input action by touching the touch surface while visually checking the screen displayed on the display panel.
  • LCD liquid crystal display
  • PDP plasma display panel
  • OLED organic light emitting diode
  • 3A and 3B are conceptual diagrams for explaining the configuration of the display module 200 in the touch input device 1000 according to the present invention.
  • 3A a configuration of a display module 200 including a display panel 200A using an LCD panel will be described.
  • the display module 200 includes a display panel 200A as an LCD panel, a first polarizing layer 271 disposed on the display panel 200A, and a first polarizing layer 271 disposed below the display panel 200A.
  • the display panel 200A as an LCD panel includes a liquid crystal layer 250 including a liquid crystal cell, a first substrate layer 261 disposed above the liquid crystal layer 250, and a liquid crystal layer 250, And a second substrate layer 262 disposed under the first substrate layer 262.
  • the first substrate layer 261 may be a color filter glass
  • the second substrate layer 262 may be a TFT glass.
  • the first substrate layer 261 and the second substrate layer 262 may be formed of a bendable material such as a plastic according to an embodiment.
  • the second substrate layer 262 may include various layers including a data line, a gate line, a TFT, a common electrode (Vcom), and a pixel electrode. Lt; / RTI > These electrical components can operate to generate a controlled electric field to orient the liquid crystals located in the liquid crystal layer 250.
  • the display module 200 may include a display panel 200A, which is an OLED panel, and a first polarizing layer 282, which is disposed on the display panel 200A.
  • the display panel 200A as an OLED panel includes an organic layer 280 including an organic light emitting diode (OLED), a first substrate layer 281 disposed over the organic layer 280, And a second substrate layer 283 disposed thereon.
  • the first substrate layer 281 may be an encapsulation glass
  • the second substrate layer 283 may be a TFT glass.
  • at least one of the first substrate layer 281 and the second substrate layer 283 may be formed of a bendable material such as a plastic.
  • an electrode used for driving a display panel 200A such as a gate line, a data line, a first power supply line (ELVDD), a second power supply line (ELVSS) .
  • OLED (Organic Light-Emitting Diode) panel is a self-luminous display panel that uses the principle that light is generated when electrons and holes are combined in an organic layer when current is applied to a fluorescent or phosphorescent organic thin film. Determine the color.
  • OLEDs utilize the principle that organic matter emits light when organic matter is placed on glass or plastic and electricity is passed through it. That is, when holes and electrons are injected into the anode and the cathode of the organic material, respectively, and then recombined with the light emitting layer, excitons having a high energy state are formed. When excitons fall into a state of low energy, energy is emitted, And to use the generated principle. At this time, the color of the light changes depending on the organic material of the light emitting layer.
  • a line-driven PM-OLED Passive-matrix Organic Light-Emitting Diode
  • an AM-OLED Active-matrix Organic Light-Emitting Diode
  • the display module can be made very thin, the contrast ratio is constant according to the angle, and color reproducibility according to temperature is good.
  • un-driven pixels are very economical in that they do not consume power.
  • the PM-OLED emits light only for a scanning time with a high current
  • the AM-OLED maintains a light emission state for a frame time with a low current. Therefore, AM-OLED has better resolution than PM-OLED, it is advantageous to drive a large-area display panel and has low power consumption.
  • each element can be individually controlled by incorporating a thin film transistor (TFT), it is easy to realize a sophisticated screen.
  • TFT thin film transistor
  • the organic material layer 280 may include a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EIL), an electron transfer layer (ETL) (Electron Injection Layer, light emitting layer).
  • HIL hole injection layer
  • HTL hole transport layer
  • EIL emission layer
  • ETL electron transfer layer
  • the HIL injects holes, and uses a material such as CuPc.
  • the HTL functions to transfer injected holes, and mainly uses materials having good hole mobility.
  • HTL may be arylamine, TPD, or the like.
  • EIL and ETL are layers for electron injection and transport, and injected electrons and holes are combined in EML to emit light.
  • EML is a material that expresses the emitted color, and is composed of a host that determines the lifetime of the organic material, and a dopant that determines color and efficiency. This is only a description of the basic structure of the organic material layer 280 included in the OLED panel, and the present invention is not limited to the layer structure or material of the organic material layer 280. [
  • the organic layer 280 is inserted between an anode (not shown) and a cathode (not shown).
  • a driving current is applied to the anode to inject holes, Electrons are injected, and holes and electrons move to the organic material layer 280 to emit light.
  • an LCD panel or an OLED panel may further include other configurations for performing the display function and may be modified.
  • the display module 200 of the touch input apparatus 1000 may include a structure for driving the display panel 200A and the display panel 200A.
  • the display module 200 may include a backlight unit (not shown) disposed under the second polarizing layer 272, A display panel control IC, a graphic control IC, and other circuits for operation of the display panel.
  • the display module 200 of the touch input apparatus 1000 may include a structure for driving the display panel 200A and the display panel 200A.
  • the display module 200 may include a backlight unit (not shown) disposed under the second polarizing layer 272, A display panel control IC, a graphic control IC, and other circuits for operation of the display panel.
  • the touch sensor 10 for detecting the touch position in the touch input apparatus 1000 may be located outside or inside the display module 200.
  • a touch sensor panel may be disposed above the display module 200, .
  • the touch surface to the touch input device 1000 may be the surface of the touch sensor panel.
  • the touch sensor 10 When the touch sensor 10 is disposed inside the display module 200 in the touch input device 1000, the touch sensor 10 may be configured to be located outside the display panel 200A. Specifically, the touch sensor 10 may be formed on the upper surfaces of the first substrate layers 261 and 281. At this time, the touch surface for the touch input device 1000 may be the upper surface or the lower surface in FIGS. 3A and 3B as an outer surface of the display module 200. [
  • the touch sensor 10 is disposed inside the display module 200 in the touch input device 1000, at least some of the touch sensors 10 are configured to be positioned in the display panel 200A, At least a remaining part of the display panel 10 may be configured to be located outside the display panel 200A.
  • any one of the driving electrode TX and the receiving electrode RX constituting the touch sensor 10 may be configured to be located outside the display panel 200A, and the remaining electrodes may be disposed inside the display panel 200A As shown in FIG.
  • any one of the driving electrode TX and the receiving electrode RX constituting the touch sensor 10 may be formed on the upper surface of the first substrate layers 261 and 281, and the remaining electrodes may be formed on the first substrate layer 261, 281) or on the upper surface of the second substrate layer 262, 283.
  • the touch sensor 10 When the touch sensor 10 is disposed inside the display module 200 in the touch input device 1000, the touch sensor 10 may be positioned inside the display panel 200A. Specifically, the touch sensor 10 may be formed on the lower surface of the first substrate layers 261 and 281 or on the upper surfaces of the second substrate layers 262 and 283.
  • an electrode for the touch sensor operation may be additionally arranged.
  • various configurations and / or electrodes disposed inside the display panel 200A may perform touch sensing
  • the touch sensor 10 may be used as a touch sensor. More specifically, when the display panel 200A is an LCD panel, at least one of the electrodes included in the touch sensor 10 is a data line, a gate line, a TFT, a common electrode (Vcom: common electrode and a pixel electrode. When the display panel 200A is an OLED panel, at least one of the electrodes included in the touch sensor 10 may include a data line, A gate line, a first power supply line ELVDD, and a second power supply line ELVSS.
  • the touch sensor 10 operates as the driving electrode and the receiving electrode described in FIG. 1A, and can detect the touch position according to the mutual capacitance between the driving electrode and the receiving electrode.
  • the touch sensor 10 may operate as the single electrode 30 described with reference to FIG. 1B to detect the touch position according to the self-capacitance of each of the single electrodes 30.
  • the electrode included in the touch sensor 10 is an electrode used for driving the display panel 200A
  • the display panel 200A is driven in the first time period, and the second time The touch position can be detected in the section.
  • the cover layer 100 formed with the touch sensor for detecting the touch position in the touch input device 1000 of the present invention and the display module 200 including the display panel 200A are bonded with an adhesive such as OCA (Optically Clear Adhesive) Lt; / RTI > Accordingly, display color clarity, visibility, and light transmittance of the display module 200 that can be confirmed through the touch surface of the touch sensor can be improved.
  • OCA Optically Clear Adhesive
  • 4A to 4E illustrate an example in which a pressure sensor is formed in the touch input device according to the present invention.
  • the display panel 200A is shown as being directly laminated and attached to the cover layer 100 in Figure 4A and some of the following drawings, this is for illustrative convenience only and the first polarizing layer 271,
  • the display module 200 located on the upper side may be laminated to the cover layer 100 and the second polarizing layer 272 and the backlight unit are omitted when the LCD panel is the display panel 200A.
  • the cover layer 100 formed with the touch sensor as the touch input device 1000 according to the embodiment of the present invention is mounted on the display module 200 shown in FIGS. 3A and 3B with an adhesive
  • the touch input device 1000 according to the embodiment of the present invention includes a case where the touch sensor 10 is disposed inside the display module 200 shown in FIGS. 3A and 3B .
  • the cover layer 100 on which the touch sensor 10 is formed covers the display module 200 including the display panel 200A
  • a touch input device 1000 that is located inside the display device 200 and in which the display module 200 is covered with a cover layer 100 such as glass can be used as an embodiment of the present invention.
  • the touch input device 1000 may be applied to various devices such as a cell phone, a PDA (Personal Data Assistant), a smartphone, a tablet PC, an MP3 player, a notebook, And electronic devices including the same touch screen.
  • a cell phone a PDA (Personal Data Assistant)
  • PDA Personal Data Assistant
  • smartphone a tablet PC
  • MP3 player a portable music player
  • notebook a notebook
  • electronic devices including the same touch screen.
  • the midframe 300 in the touch input device 1000 includes a housing 320 as an outermost mechanism of the touch input device 1000 and a circuit for operating the touch input device 1000, A mounting space 310 where the substrate and / or the battery can be placed, and the like.
  • a central processing unit (CPU), an application processor (CPU), or the like may be mounted on the circuit board for operating the touch input device 1000 as a main board.
  • the circuit board and / or the battery for the operation of the display module 200 and the touch input device 1000 are separated through the midframe 300 and the electrical noise generated in the display module 200 and the noise generated in the circuit board 200 Can be blocked.
  • the touch sensor 10 or the cover layer 100 may be formed wider than the display module 200, the mid frame 300 and the mounting space 310 in the touch input device 1000,
  • the housing 320 may be formed to enclose the display module 200, the midframe 300, and the circuit board together with the touch sensor 10.
  • the touch input apparatus 1000 detects a touch position through the touch sensor 10 and detects an electrode used for detecting the touch position and a separate sensor So that the touch pressure can be detected.
  • the touch sensor 10 may be located inside or outside the display module 200.
  • the configuration for pressure detection will be collectively referred to as a pressure sensing portion.
  • the pressure sensing part may include pressure sensors 450 and 460.
  • the pressure sensing unit may further include a spacer layer 420 formed of, for example, an air gap, which will be described in detail with reference to FIGS. 4A to 4D.
  • the spacer layer 420 may be implemented with an air gap.
  • the spacer layer may be made of a shock-absorbing material according to an embodiment.
  • the spacer layer 420 may be filled with a dielectric material according to embodiments.
  • the spacer layer 420 may be formed of a material having a resilient force that contracts upon application of pressure and returns to its original shape upon release of pressure.
  • the spacer layer 420 may be formed of an elastic foam. Further, since the spacer layer is disposed under the display module 200, it may be a transparent material or an opaque material.
  • the reference potential layer may be disposed under the display module 200.
  • the reference potential layer may be formed in the mid frame 300 disposed under the display module 200, or the mid frame 300 itself may serve as a reference potential layer.
  • the reference potential layer may be formed on a cover (not shown) disposed on the upper part of the mid frame 300 and disposed under the display module 200 and performing a function of protecting the display module 200, It can serve as a reference potential layer.
  • the display panel 200A may be bent when the pressure is applied to the touch input device 1000 and the distance between the reference potential layer and the pressure sensors 450 and 460 may vary as the display panel 200A is warped.
  • a spacer layer may be disposed between the reference potential layer and the pressure sensors 450 and 460. Specifically, a spacer layer may be disposed between the display module 200 and the midframe 300 where the reference potential layer is disposed, or between the display module 200 and the cover on which the reference potential layer is disposed.
  • the reference potential layer may be disposed inside the display module 200.
  • the reference potential layer may be disposed on the upper surface or the lower surface of the first substrate layer 261, 281 of the display panel 200A, or on the upper surface or the lower surface of the second substrate layer 262, 283.
  • the display panel 200A may be bent when the pressure is applied to the touch input device 1000 and the distance between the reference potential layer and the pressure sensors 450 and 460 may vary as the display panel 200A is warped.
  • a spacer layer may be disposed between the reference potential layer and the pressure sensors 450 and 460. In the case of the touch input device 1000 shown in Figs. 3A and 3B, the spacer layer may be disposed on the top or inside of the display panel 200A.
  • the spacer layer may be implemented with an air gap.
  • the spacer layer may be made of a shock-absorbing material according to an embodiment.
  • the spacer layer may be filled with a dielectric material according to an embodiment.
  • the spacer layer may be formed of an elastic foam.
  • the elastic foam according to the embodiment has elasticity such that it can be changed when the impact is applied, so that the elastic foam can perform the shock absorbing function, but it can provide the uniformity of the performance for pressure detection.
  • the spacer layer since the spacer layer is disposed on or inside the display panel 200A, it may be a transparent material.
  • the elastic foam according to the embodiment may include at least one of polyurethane, polyester, polypropylene, and acrylic.
  • the spacer layer when the spacer layer is disposed inside the display module 200, the spacer layer may be an air gap included in manufacturing the display panel 200A and / or the backlight unit.
  • the one air gap can perform the function of the spacer layer.
  • the display panel 200A and / or the backlight unit include a plurality of air gaps, As a spacer layer.
  • the sensors 450 and 460 for detecting the pressure are referred to as the pressure sensors 450 and 460 so as to be clearly distinguished from the electrodes included in the touch sensor 10.
  • the pressure sensors 450 and 460 since the pressure sensors 450 and 460 are disposed on the rear surface of the display panel 200A rather than on the front surface thereof, the pressure sensors 450 and 460 may be formed of an opaque material as well as a transparent material.
  • the display panel 200A is an LCD panel, light must be transmitted through the backlight unit, so that the pressure sensors 450 and 460 may be made of a transparent material such as ITO.
  • a frame 330 having a predetermined height along the rim of the upper portion of the midframe 300 may be formed to hold the spacer layer 420 on which the pressure sensors 450 and 460 are disposed.
  • the frame 330 may be adhered to the cover layer 100 with an adhesive tape (not shown).
  • the frame 330 is formed on all the edges of the midframe 300 (e.g., four sides of a square), but the frame 330 is formed at least a part of the edges of the midframe 300 Three prismatic surfaces).
  • the frame 330 may be integrally formed with the midframe 300 on the upper surface of the midframe 300.
  • the frame 330 may be constructed of a material that is not elastic.
  • the display panel 200A when the display panel 200A is applied with pressure through the cover layer 100, the display panel 200A may be bent together with the cover layer 100, The magnitude of the touch pressure can be detected even if there is no deformation of the mold.
  • 4C is a cross-sectional view of a touch input device including a pressure sensor according to an embodiment of the present invention.
  • the pressure sensors 450 and 460 according to the embodiment of the present invention may be disposed on the lower surface of the display panel 200A as the spacer layer 420. As shown in FIG.
  • the pressure sensor for pressure detection may include a first sensor 450 and a second sensor 460.
  • one of the first sensor 450 and the second sensor 460 may be a driving sensor and the other may be a receiving sensor.
  • a drive signal may be applied to the drive sensor and a sense signal may be obtained that includes information about the electrical characteristics that change as pressure is applied through the receive sensor. For example, when a voltage is applied, mutual capacitance may be created between the first sensor 450 and the second sensor 460.
  • FIG. 4D is a cross-sectional view of the touch input apparatus 1000 shown in FIG.
  • the upper surface of the midframe 300 may have a ground potential for noise shielding.
  • the cover layer 100 and the display panel 200A may be warped or pressed.
  • the distance d between the ground potential plane and the pressure sensors 450 and 460 can be reduced to d '.
  • the fringing capacitance is absorbed to the upper surface of the midframe 300, so that the mutual capacitance between the first sensor 450 and the second sensor 460 can be reduced have. Accordingly, it is possible to calculate the magnitude of the touch pressure by obtaining a reduction amount of mutual capacitance in the sensing signal obtained through the reception sensor.
  • the upper surface of the midframe 300 is the ground potential, that is, the reference potential layer.
  • the reference potential layer may be disposed inside the display module 200.
  • the display panel 200A can be bent or pressed according to a touch to apply pressure.
  • the position where the display panel 200A is deformed when the display panel 200A is bent or pressed may not coincide with the touch position, but the display panel 200A may exhibit warping at least at the touch position.
  • the touch position is close to the edge and the edge of the display panel 200A, the position where the display panel 200A is warped or pressed most greatly may be different from the touch position, It is possible to indicate warping or pressing.
  • the first sensor 450 and the second sensor 460 shown in Figs. 4C and 4D, respectively may be constituted by a plurality of sensors in the form of a rhombus.
  • the plurality of first sensors 450 are mutually connected in the first axis direction
  • the plurality of second sensors 460 are mutually connected in the second axis direction orthogonal to the first axis direction
  • At least one of the first sensor 450 and the second sensor 460 may be in the form of a plurality of diamond-shaped sensors connected through a bridge so that the first sensor 450 and the second sensor 460 are insulated from each other.
  • the first sensor 450 and the second sensor 460 shown in FIG. 5 may be configured as a sensor of the type shown in FIG. 12B.
  • the touch pressure is detected from the change of mutual capacitance between the first sensor 450 and the second sensor 460.
  • the pressure sensing unit may be configured to include only the pressure sensor of either the first sensor 450 or the second sensor 460.
  • one pressure sensor and the ground layer (the mid frame 300 or the display module 460) (I.e., the reference potential layer disposed in the insulating layer 200), that is, the magnitude of the self-capacitance can be detected to detect the magnitude of the touch pressure.
  • a drive signal is applied to the one pressure sensor, and a change in magnetic capacitance between the pressure sensor and the ground layer can be sensed by the pressure sensor.
  • the pressure sensor may include only the first sensor 450 and may include a first sensor 450 and a second sensor 450, which are caused by the distance between the midframe 300 and the first sensor 450, It is possible to detect the magnitude of the touch pressure from the capacitance change between the mid frames 300.
  • the capacitance d between the midframe 300 and the first sensor 450 may increase as the touch pressure increases as the touch pressure increases.
  • the pressure sensor does not need to have a comb-like shape or a triangular shape necessary for increasing mutual capacitance change detection accuracy, and may have a single plate (for example, a rectangular plate shape)
  • a plurality of first sensors 450 may be arranged in a lattice pattern at regular intervals.
  • 4E illustrates a case where the pressure sensors 450 and 460 are formed on the upper surface of the midframe 300 and the lower surface of the display panel 200A in the spacer layer 420.
  • the first sensor 450 is formed on the lower surface of the display panel 200A
  • the second sensor 460 is formed on the first insulating layer 470 such that the second sensor 460 is formed on the lower surface of the display panel 200A
  • 2 insulating layer 471 may be disposed on the upper surface of the midframe 300 in the form of a sensor sheet on which the second sensor 460 is formed.
  • the cover layer 100 and the display panel 200A may be warped or pressed. Accordingly, the distance d between the first sensor 450 and the second sensor 460 can be reduced. In this case, the mutual capacitance between the first sensor 450 and the second sensor 460 may increase as the distance d decreases. Accordingly, it is possible to calculate the magnitude of the touch pressure by acquiring an increase amount of mutual capacitance in the sensing signal obtained through the reception sensor.
  • the first sensor 450 and the second sensor 460 are formed on different layers, so that the first sensor 450 and the second sensor 460 need not have a comb-like shape or a trident shape
  • One of the first sensor 450 and the second sensor 460 may have a single plate (for example, a rectangular plate), and the other may have a plurality of sensors at regular intervals And may be arranged in a lattice pattern.
  • the pressure sensors 450 and 460 may be formed directly on the display panel 200A.
  • 5A to 5C are cross-sectional views illustrating an embodiment of a pressure sensor formed directly on various display panels in a touch input device according to an embodiment of the present invention.
  • 5A shows pressure sensors 450 and 460 formed on a display panel 200A using an LCD panel.
  • the pressure sensors 450 and 460 may be formed on the lower surface of the second substrate layer 262. As shown in FIG. At this time, the pressure sensors 450 and 460 may be formed on the bottom surface of the second polarizing layer 272.
  • a touch pressure is detected based on the amount of mutual capacitance change when a pressure is applied to the touch input apparatus 1000, a drive signal is applied to the drive sensor 450, and a reference potential layer (Not shown) and the pressure sensors 450 and 460 from the receiving sensor 460.
  • the receiving sensor 460 receives the electrical signal from the receiving sensor 460, A driving signal is applied to the pressure sensors 450 and 460 and the distance between the reference potential layer (not shown) and the pressure sensors 450 and 460, which are spaced apart from the pressure sensors 450 and 460, From the pressure sensors 450 and 460, an electrical signal including information on the capacitance that changes with the change.
  • Fig. 5B shows pressure sensors 450 and 460 formed on the lower surface of the display panel 200A using an OLED panel (in particular, an AM-OLED panel). Specifically, the pressure sensors 450 and 460 may be formed on the lower surface of the second substrate layer 283. At this time, the method of detecting the pressure is the same as that described in Fig. 5A.
  • the pressure sensors 450 and 460 formed on the lower surface of the second substrate layer 283 disposed under the organic material layer 280 may be made of an opaque material.
  • the patterns of the pressure sensors 450 and 460 formed on the lower surface of the display panel 200A can be seen by the user, in order to directly form the pressure sensors 450 and 460 on the lower surface of the second substrate layer 283, After arranging a light shielding layer such as black ink on the lower surface of the layer 283, pressure sensors 450 and 460 can be formed on the light shielding layer.
  • pressure sensors 450 and 460 are formed on the lower surface of the second substrate layer 283, but a third substrate layer is disposed below the second substrate layer 283, The pressure sensors 450 and 460 may be formed on the bottom surface.
  • the display panel 200A is a flexible OLED panel
  • the third substrate layer 285, which is not relatively bended at the lower portion of the substrate layer 283, can be disposed.
  • a light shielding layer may be disposed under the third substrate layer 285, and a detailed description thereof will be described later.
  • a substrate having a light-shielding function such as a substrate colored in black, may be used as the third substrate layer 285.
  • the pattern of the pressure sensor 450 formed under the display panel 200A may not be visible to the user even if a separate light shielding layer is not disposed.
  • FIG. 5C shows a pressure sensor 450 formed in the display panel 200A using an OLED panel.
  • the pressure sensor 450 may be formed on the upper surface of the second substrate layer 283.
  • the method of detecting the pressure is the same as that described in Fig. 5A.
  • the display panel 200A using the OLED panel has been described.
  • the pressure sensor 450 may be formed on the upper surface of the second substrate layer 272 of the display panel 200A using the LCD panel It is possible.
  • the pressure sensor 450 is formed on the upper surface or the lower surface of the second substrate layer 262 or 283. However, when the pressure sensor 450 is formed on the upper surface or the lower surface of the first substrate layer 261 or 281, As shown in FIG.
  • the pressure sensor 450 when the display panel 200A is an OLED panel, the pressure sensor 450 is disposed on the bottom surface of the display panel 200A according to the embodiment of FIG. 5B, When the pressure sensor 450 formed on the lower surface of the second substrate layer 283 disposed under the organic material layer 280 is made of an opaque material, a pressure sensor (not shown) formed on the lower surface of the display panel 200A 450 can be seen by the user. It is necessary to arrange a separate light shielding layer in order to prevent the pattern of the pressure sensor 450 from being visible.
  • Figs. 6A to 6F show the shape of the display panel 200A due to the arrangement of the light-shielding layer.
  • a light shielding layer 284 such as black ink is disposed under the second substrate layer 283, and a pressure sensor 450 (see FIG. 6A) is disposed on the bottom surface of the light shielding layer 284. In this case, ) Can be formed.
  • the pressure sensor 450 may be formed directly in contact with the lower surface of the second substrate layer 283,
  • the light shielding layer 284 may be disposed under the substrate layer 283.
  • the display panel 200A may arrange a third substrate layer 285 under the second substrate layer 283,
  • the pressure sensor 450 may be formed on the lower surface of the light shielding layer 284 after the light shielding layer 284 such as black ink is disposed under the substrate layer 285.
  • the display panel 200A can arrange the third substrate layer 285 under the second substrate layer 283,
  • the pressure sensor 450 may be first formed in direct contact with the lower surface of the third substrate layer 285 and then the light shielding layer 284 may be disposed under the third substrate layer 285 on which the pressure sensor 450 is formed.
  • the display panel 200A can arrange a third substrate layer 285 below the second substrate layer 283,
  • the pressure sensor 450 may be formed in direct contact with the lower surface of the third substrate layer 285 and the light shielding layer 284 may be disposed between the second substrate layer 283 and the third substrate layer 285 .
  • the display panel 200A may arrange a third substrate layer 285 under the second substrate layer 283,
  • the light shielding layer 284 may be disposed under the third substrate layer 285 and the pressure sensor 450 may be disposed between the second substrate layer 283 and the third substrate layer 285.
  • the light-shielding layer may include black ink, as well as a black film, a black double-adhesive tape (DAT), or a black elastic material that absorbs impact to the touch input device .
  • the elastic material (or the elastic foam) according to the embodiment has a flexibility that the shape of the elastic material (or the elastic foam) can be changed, such as being pressed when the impact is applied, thereby providing the performance uniformity for pressure detection
  • the 'black' may mean a completely black color having no reflection of light, but may also mean black color in which at least one of brightness and saturation is different within a predetermined threshold range.
  • a predetermined threshold range for example, in the case of the former, it means 100% complete black color; in the latter case, the black color with at least one of brightness or saturation in the predetermined threshold range (for example, 30% range) . ≪ / RTI > In the latter case, the pressure sensor 450 can shield the pressure sensor 450 from light, even if the pressure sensor 450 has only about 70 percent brightness or saturation of black.
  • the predetermined threshold range may be such that the pressure sensor 450 can be shielded from light.
  • a touch pressure detecting method applied to the front surface of the touch input apparatus 1000 has been described. 7, when the touch pressure is applied to the front surface 1 of the touch input apparatus 1000, the cover layer 100 is bent and the capacitance of the pressure sensor horizontally arranged with the cover layer 100 The touch pressure was detected using the change. However, it is also necessary to detect the touch pressure applied to the side surface 2 of the touch input apparatus 1000 as shown in Figs. 7 and 9. Therefore, the touch pressure detecting method applied to the side surface 2 of the touch input apparatus 1000 will be described below.
  • the touch input device 1000 may include a cover layer 100 on the front surface 1.
  • 7 is a touch input device in which the cover layer 100 is a flat type
  • FIG. 9 is a touch input device in which the cover layer 100 is an edge type.
  • the flat type means a shape in which the side surface 2 of the touch input device 1000 is cut down at right angles as shown in Fig. 7, and the edge type means the side surface 2 of the touch input device 1000 Means that it is formed in a curved shape in the X-axis direction.
  • the flat type may include a 2.5D glass in which a corner portion of the touch input device 1000 is rounded as shown in FIG.
  • Fig. 8A is a sectional view of Fig. 7, and each component of the touch input device 1000 of Fig. 8A has the same function as each component of Fig. 4A.
  • 10A is a sectional view of FIG. 9, and the role of each component of the touch input device 1000 of FIG. 10A is the same as that of each component of FIG. 8A.
  • the touch input apparatus 1000 of the present invention includes at least a cover layer 100 on a front surface 1 and pressure sensors 450 and 460 disposed horizontally with the cover layer 100 to detect a touch pressure, And a controller 13 for sensing the pressure applied to the side surface 2 of the touch input apparatus 1000 from the electrical signals sensed by the pressure sensors 450 and 460.
  • the application of the pressure to the side surface 2 according to the embodiment of the present invention may include the case where the user holds both sides 2 of the touch input apparatus 1000 by hand.
  • the controller 13 determines whether the profile of the electrical signal sensed by the pressure sensors 450 and 460 satisfies a predetermined condition. If the profile satisfies the predetermined condition, the control unit 13 applies the profile to the side surface 2 of the touch input apparatus 1000 It can be judged that a losing pressure has been applied. When the profile of the electrical signal sensed by the pressure sensors 450 and 460 satisfies the predetermined condition, the control unit 130 determines the magnitude of the pressure applied to the side surface 2 based on the magnitude of the sensed electrical signal. Can be determined. That is, the control unit 13 may sense only the pressure applied to the side surface 2 of the touch input apparatus 1000, or may determine the magnitude of the applied pressure.
  • the pressure applied to the side surface (2) is applied and based on the size of the sensed electrical signal
  • the magnitude of the pressure applied to the side surface 2 can be determined.
  • the electrical signal according to the present invention may mean a capacitance change of the pressure sensors 450 and 460 or a resistance change of the strain gauge as shown in FIG.
  • the control unit 13 detects the touch pressure by a change in capacitance due to a change in distance between the pressure sensors 450 and 460 generated according to the pressure applied to the side surface 2 of the touch input apparatus 1000 and the reference potential layer can do. Specifically, the cover layer 100 and the display panel 200A are bent when the touch input apparatus 1000 is applied with pressure, and the reference potential layer and the pressure sensor (not shown) as the cover layer 100 and the display panel 200A are warped 450 and 460 may vary. (d- > d ')
  • the reference potential layer can be disposed on the upper surface of the midframe 300.
  • the reference potential layer is disposed inside the display panel 200A, 200A, or the lower surface of the display panel 200A.
  • the cover layer 100 may be disposed on the front surface 1 of the touch input apparatus 1000 according to the present invention and a portion of the housing 320 may be disposed on the side surface 2 of the touch input apparatus 1000, Or a part of the cover layer 100 may be disposed. 7, at least one of a portion of the housing 320 and a portion of the midframe 300 is formed on the side surface 2 of the touch input apparatus 1000 .
  • the cover layer 100 shown in FIG. 9 is an edge type
  • a part of the housing 320, a part of the midframe 300, and a cover layer 100 may be disposed.
  • the cover layer 100 may be bent in a convex shape as shown in FIGS. 8B and 8E depending on the pressure applied to the side surface 2 of the touch input device 1000, Or the cover layer 100 may be bent in a concave shape as shown in Figs. 8C and 8F.
  • the pressure applied to the side surface 2 of the touch input apparatus 1000 may be applied through at least one of a part of the housing 320 and a part of the mid frame 300, as described above.
  • the display panel 200A may include an OLED, a flexible OLED, an LCD, or the like.
  • the cover layer 100 may be bent in a convex shape as shown in FIGS. 10B and 10G , Or the cover layer 100 may be bent in a concave shape as shown in Figs. 10C and 10H.
  • the pressure applied to the side surface 2 of the touch input apparatus 1000 is, as described above, either the frame 330 that is a part of the midframe 300 of Figs. 10B and 10C, Or may be applied through a portion of the housing 320 of Figure 10E.
  • the display panel 200A may include a flexible OLED.
  • FIG. 8A illustrate that the pressure sensors 450 and 460 are attached to the lower surface of the display panel 200A.
  • the embodiment described in FIGS. 8 to 10 may be applied to the pressure sensors 450 and 460, 460 are implemented in the form of an integral sheet formed between the insulating layers 470, 471, the same or similar can be applied.
  • the cover layer 100 may be bent in a concave shape or may be bent in a convex shape.
  • the pressure patterns detected by the pressure sensors 450 and 460 may be different from each other depending on the position where the user holds the side surface 2.
  • the touch input apparatus 1000 may include a separate memory (not shown) to store data related to the pressure pattern in advance, and may store a pattern of pressure sensed by the pressure sensors 450 and 460, If the condition is satisfied, it can be determined that the pressure is applied to the position of the side surface 2.
  • the pressure sensor numbers (1) to (15) are indicated, and the capacitance values of the respective sensors are also indicated.
  • the capacitance value is (+), it indicates that the sensor and the reference potential layer are close to each other.
  • the capacitance value is (-), the sensor and the reference potential layer are separated from each other. This is also applied to Fig. 12 below.
  • FIG. 11A shows that the upper surface of the side surface 1 of the touch input apparatus 1000 is pressed.
  • the capacitance value indicates (-), And that the dislocation layer is distant. This indicates that the upper surface of the touch input device 100 is warped to a more convex shape than the remaining area.
  • 11B shows a case where the center side of the side surface 1 of the touch input apparatus 1000 is pressed.
  • the capacitance value is negative (-), Respectively. This shows that the center side of the touch input device 100 is warped in a more convex shape than the remaining area.
  • 11C shows a case in which the lower side of the side surface 1 of the touch input apparatus 1000 is pressed and the capacitance value is negative in the peripheral pressure sensors around the pressed position, Respectively. This indicates that the lower surface of the touch input apparatus 100 is warped in a more convex shape than the remaining area.
  • the present invention it is possible to detect the magnitude of the pressure applied to the side surface of the touch input apparatus by using the front sensor without separately providing the side sensor.

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Abstract

L'invention concerne un dispositif d'entrée tactile qui comprend : une couche de couverture disposée sur au moins la surface avant de celle-ci ; des capteurs de pression disposés en parallèle avec la couche de couverture de façon à détecter une pression tactile ; et une unité de commande destinée à détecter une pression appliquée à une surface latérale du dispositif d'entrée tactile à partir de signaux électriques détectés par les capteurs de pression.
PCT/KR2018/014757 2017-12-01 2018-11-28 Dispositif d'entrée tactile pour détecter une pression appliquée à une surface latérale Ceased WO2019107889A1 (fr)

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CN114804660A (zh) * 2022-03-30 2022-07-29 北京京东方传感技术有限公司 一种玻璃结构
EP4177707A3 (fr) * 2021-11-04 2023-08-02 Samsung Display Co., Ltd. Dispositif d'affichage

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KR20210027964A (ko) * 2019-09-03 2021-03-11 삼성전자주식회사 입력 장치를 포함하는 전자 장치
KR102852717B1 (ko) * 2022-12-30 2025-08-28 가천대학교 산학협력단 수직 적층형 유기발광다이오드가 결합되는 센서 및 그 동작 방법

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CN114804660A (zh) * 2022-03-30 2022-07-29 北京京东方传感技术有限公司 一种玻璃结构

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