WO2016076592A1 - Procédé de commande d'un dispositif d'affichage apte à numériser une image - Google Patents

Procédé de commande d'un dispositif d'affichage apte à numériser une image Download PDF

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Publication number
WO2016076592A1
WO2016076592A1 PCT/KR2015/012026 KR2015012026W WO2016076592A1 WO 2016076592 A1 WO2016076592 A1 WO 2016076592A1 KR 2015012026 W KR2015012026 W KR 2015012026W WO 2016076592 A1 WO2016076592 A1 WO 2016076592A1
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WIPO (PCT)
Prior art keywords
contact
touch
touch sensor
display device
transistor
Prior art date
Application number
PCT/KR2015/012026
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English (en)
Korean (ko)
Inventor
김종욱
전호식
Original Assignee
크루셜텍(주)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from KR1020150044067A external-priority patent/KR20160057285A/ko
Application filed by 크루셜텍(주) filed Critical 크루셜텍(주)
Priority to CN201580061784.1A priority Critical patent/CN107111395A/zh
Priority to US15/526,687 priority patent/US20170351364A1/en
Publication of WO2016076592A1 publication Critical patent/WO2016076592A1/fr

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    • 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; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2354/00—Aspects of interface with display user

Definitions

  • the present invention relates to a method of driving an image scanable display device.
  • the touch screen panel is a device for inputting a user's command by touching a character or a figure displayed on a screen of the image display device with a human finger or other contact means, and is attached to the image display device.
  • the touch screen panel converts a contact position touched by a human finger or the like into an electrical signal.
  • the electrical signal is used as an input signal.
  • touch detection methods such as resistive film, optical, capacitive, and ultrasonic methods.
  • the capacitance changes when the touch generating means contacts the screen of the display device. Detects whether a touch occurs using the.
  • the capacitive touch screen panel can detect a touch of a human finger, a conductive touch pen, or the like.
  • biometric information authentication the most commonly used one is fingerprint authentication. Recently, a product using a fingerprint recognition and authentication technology through a smartphone and tablet PC has been released.
  • a device for fingerprint recognition in order for the sensors for fingerprint recognition to be incorporated into a portable device, a device for fingerprint recognition must be installed together with an image display device, thereby increasing the volume of the portable device.
  • An object of the present invention is to design at least one touch sensor to correspond to each unit pixel of a display module so that an image contacted on a display screen can be scanned on at least a portion of the display device.
  • a display module including a plurality of unit pixels disposed in a display area in which an image is displayed, and a sensing area overlapping the display area are formed.
  • a touch sensor module including at least one touch sensor corresponding to each of the unit pixels, the method comprising: a sensing mode determining step of determining a sensing mode of the display device; A contact sensor selection step of selecting activation target contact sensors according to the determined sensing mode; And activating and detecting the selected touch sensors and receiving a detection signal from the activated touch sensors.
  • the sensing mode may include one of the touch sensors included in a plurality of touch sensor sectors including the touch sensors that are disposed in the partitioned area and partition the sensing area of the display device.
  • a touch recognition mode for allowing some touch sensors to be selected so as to recognize whether or not the touch means contacts the display device;
  • a fingerprint recognition mode for scanning an image of a user fingerprint in contact with the display device by allowing more contact sensors to be selected than the touch recognition mode.
  • the touch sensor may be connected to a scan line to which a scan signal for providing a driving voltage is applied to the touch sensor, and the touch sensor module may include a plurality of touch sensor blocks including two or more touch sensor sectors.
  • the sensing mode may further include: a non-contact recognition mode for allowing contact sensors of some of the touch sensors included in the touch sensor blocks to be selected, and recognizing whether the contact means is close to the sensing area; Further, when the non-contact sensing mode is selected, the magnitude of the voltage of the scan signal applied to the touch sensor may be larger than when either the touch recognition mode or the fingerprint recognition mode is selected.
  • the detection signal generated by the touch sensor may be used.
  • the reference voltage determination step of determining whether or not the voltage value exceeds the non-contact recognition reference voltage, and further comprising, when the voltage value of the detection signal is less than the reference voltage in the reference voltage exceeding determination step, the plurality of The touch recognition block in which the detection signal is generated among the touch sensor blocks is determined as the non-contact recognition center, and in the determination of exceeding the reference voltage, when the voltage value of the detection signal exceeds the reference voltage, the touch recognition mode.
  • the touch sensor can be activated and detected.
  • the fingerprint recognition mode may further include: an entire fingerprint recognition mode for allowing all the touch sensors of the display device to be selected; An icon fingerprint recognition mode for selecting a plurality of touch sensors overlapping at least one icon among a plurality of icons displayed on the display device; And an input window fingerprint recognition mode in which a plurality of touch sensors overlapping the input window displayed in a partial region of the display device are selected.
  • an area except an area where the touch sensors overlapping the icon or the input window are arranged may be further selected.
  • the touch sensors of the selected touch sensor sectors may be arranged at an edge of the touch sensor sector or randomly disposed in the touch sensor sector.
  • the method may further include: a contact point determining step of determining a contact point based on sensing information received from the touch sensors in which contact of the contact means overlapping the plurality of touch sensors is sensed.
  • the determining step may comprise: 1) the center of the touch sensor sector comprising the largest number of the touch sensors of which touch has been detected or 2) the center of the touch sensor sectors comprising the touch sensors having detected a touch.
  • the computational center spaced apart from each other by the weighted average of the number of touch sensors in which the touch is included in each of the touch sensor sectors may be determined as the center of the contact point.
  • any one of the plurality of touch sensor sectors and another contact sensor sector adjacent thereto may share at least one or more touch sensors.
  • the contact sensor which is not included in any contact sensor sector, may be disposed between the contact sensor sector of any one of the contact sensor sectors and another contact sensor sector adjacent thereto.
  • the touch sensor may include a pixel electrode formed of a transparent material and forming a contact capacitance by contact with the contact means; And a transistor unit including at least one transistor connected to the pixel electrode, wherein the pixel electrode overlaps the unit pixel of the display module, and light for displaying an image is from the unit pixel. Can penetrate.
  • the transistor unit may further include: a reset transistor having a drain electrode connected to the pixel electrode and at least one of a gate electrode and a source electrode connected to a first scan line to which a first selection signal is applied or a data line to provide a data signal; A gate electrode is connected to a drain electrode of the reset transistor, and a source electrode is connected to any one of the first scan line, the data line, and a second scan line to which a second selection signal different from the first selection signal is applied.
  • a reset transistor having a drain electrode connected to the pixel electrode and at least one of a gate electrode and a source electrode connected to a first scan line to which a first selection signal is applied or a data line to provide a data signal
  • a gate electrode is connected to a drain electrode of the reset transistor, and a source electrode is connected to any one of the first scan line, the data line, and a second scan line to which a second selection signal different from the first selection signal is applied.
  • a drain electrode is connected to a drain electrode of the amplifying transistor, a gate electrode is connected to a second scan line to which a second selection signal is applied, and a source electrode is connected to a readout line for detecting a current corresponding to the contact capacitance; And a detection transistor connected thereto.
  • the activating and detecting of the touch sensor may include: charging a contact capacitance formed between the pixel electrode and the contact means through the reset transistor that is turned on in response to the first selection signal; Generating a current varying with the voltage charged in the contact capacitance through the amplifying transistor; And detecting the generated current through the detection transistor turned on by receiving the second selection signal, and determining whether or not the contact is made with the upper portion of the touch sensor.
  • the pixel electrode may be disposed above the reset transistor, the amplifying transistor, the detection transistor, the first scan line, the second scan line, the data line, and the read out line.
  • the pixel electrode may include at least one of the reset transistor, the amplifying transistor, the detection transistor, a portion of the first scan line, a portion of the second scan line, a portion of the data line, and a portion of the read out line. Can cover.
  • the reset transistor, the amplifying transistor, and the detection transistor may be disposed not to cover the unit color pixels of the color filter layer of the display module, and the pixel electrode may be disposed to cover at least a portion of the unit color pixels.
  • any one of the plurality of touch sensors and another touch sensor adjacent thereto are connected to one data line, and the touch sensor and another touch sensor adjacent to the data line are connected to each other.
  • the data line is formed of a plurality of data lines to which the data signals, which are independently formed, are respectively input, and are sequentially arranged in the plurality of scan lines including the first scan line and the second scan line.
  • Each of the scan signals formed to be input is input, and the touch sensor to which the scan signal and the data signal are simultaneously input is activated.
  • the pixel electrode of the touch sensor is in contact with one surface
  • the back surface further comprises a protective layer for contacting the user fingerprint, and different values according to the contact capacity of the ridge and the valley of the user fingerprint in contact with the protective layer.
  • a separation space is formed between the pixel electrode of one of the plurality of touch sensors and the pixel electrode of the other touch sensor, and the one space adjacent to the pixel electrode of the one touch sensor.
  • the space forms one sensing pitch, and the width of the sensing pitch may be formed in any one of a range of 5 um to 200 um.
  • the magnitude of the detected signal may be increased by using a coupling phenomenon caused by parasitic capacitance included in the transistor and the peripheral circuit configuration.
  • the visibility of the display device can be increased.
  • the touch sensor may be designed in a display unit pixel size so that an image contacting the display screen may be sensed on the display device.
  • the touch sensor of the minute unit is disposed on the display device, there is an advantage in that it is possible to scan the fingerprint image of the user or detect whether the contact means having a minute diameter such as a pin or a brush is in contact.
  • FIG. 1 is a diagram illustrating a state of an electronic device according to an embodiment of the present invention.
  • FIGS. 2A to 2D are cross-sectional views illustrating a configuration of a display device having an image sensing function according to an exemplary embodiment of the present invention.
  • FIG. 3 is a plan view illustrating a configuration of a display device according to an exemplary embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a configuration of a sensor array layer implementing an image sensing function according to an embodiment of the present invention.
  • FIG. 5 is a circuit diagram illustrating an embodiment of a contact sensor disposed on a sensor array.
  • FIG. 6 is a circuit diagram illustrating a configuration of a capacitive touch sensor applicable to a display device according to an exemplary embodiment of the present invention.
  • FIGS. 7 to 9 are circuit diagrams illustrating a configuration of a capacitive touch sensor according to another exemplary embodiment of the present invention.
  • FIG. 10 is a timing diagram for describing an operation of a touch sensor according to an exemplary embodiment of the present invention.
  • FIG. 11 is a plan view of a touch sensor according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating a plan view of a sensor array in which a plurality of contact sensors are arranged according to another exemplary embodiment.
  • FIG. 13 is an enlarged plan view of the touch sensor of the unit pixel illustrated in FIG. 12.
  • FIG. 14 is a cross-sectional view taken along line AA ′ of the touch sensor of the unit pixel illustrated in FIG. 12.
  • FIG. 15 is a cross-sectional view taken along line B-B 'of the touch sensor of the unit pixel illustrated in FIG. 12.
  • FIG. 16 is a cross-sectional view taken along line C-C 'of the touch sensor of the unit pixel shown in FIG.
  • 17 is a sectional view showing a touch sensor according to another embodiment of the present invention.
  • FIG. 18 is a plan view of a sensor array in which a plurality of touch sensors according to another embodiment of the present invention is arranged.
  • FIG. 19 is an enlarged plan view of the touch sensor of the unit pixel illustrated in FIG. 18.
  • 20 is a view showing a plan view of a touch sensor according to another embodiment of the present invention.
  • 20 is a plan view of a touch sensor according to another embodiment of the present invention.
  • 21 is a simplified exploded perspective view of a display device including a touch sensor according to another exemplary embodiment of the present invention.
  • FIG. 22 is a diagram illustrating a schematic arrangement of a touch sensor of the display device of FIG. 21.
  • FIG. 23 is a view illustrating a schematic arrangement of a touch sensor according to another embodiment of the present invention.
  • FIG. 24 is a top view of the contact sensor of FIG. 23.
  • FIG. 25 is a view illustrating a state in which a display device including a touch sensor is driven in a touch recognition mode according to another exemplary embodiment of the present invention.
  • FIG. 26 is a diagram illustrating a driving state of a touch sensor array in the display device of FIG. 25.
  • FIG. 27 is a timing diagram for describing an operation of the touch sensor of FIG. 26.
  • FIG. 28 is a view illustrating a state in which contact means is in contact while the display device of FIG. 27 is driven in the touch recognition mode.
  • 29 to 31 are views illustrating a state in which a display device is driven in a contact recognition mode according to another exemplary embodiment of the present invention.
  • FIG. 32 is a diagram illustrating a state in which the display device of FIG. 25 is driven in a full fingerprint recognition mode.
  • FIG. 33 is a diagram illustrating a state in which the display device of FIG. 25 is driven in an icon fingerprint recognition mode.
  • FIG. 34 is a diagram illustrating a state in which the display device of FIG. 25 is driven in an input window fingerprint recognition mode.
  • 35 is a diagram illustrating a state in which the display device of FIG. 25 is driven in a non-contact recognition mode.
  • 36 is a schematic block diagram illustrating a configuration of the display device of FIG. 25.
  • FIG. 37 is a flowchart illustrating a driving process of the display device of FIG. 25.
  • contact recognition means a function of recognizing an object in contact with a surface, and encompasses both fingerprint or touch recognition of a human finger and touch recognition by other touch generating means. It must be understood in the sense.
  • FIG. 1 is a diagram illustrating a state of an electronic device according to an embodiment of the present invention.
  • the electronic device 10 includes a display device DP.
  • the electronic device 10 may be a digital device including a wired / wireless communication function or another function.
  • a digital device having a computing capability by mounting a microprocessor and having a memory means such as a mobile phone, navigation, web pad, PDA, workstation, personal computer (for example, notebook computer, etc.), preferably Will be described assuming a smartphone as an example, but is not necessarily limited thereto.
  • the display device DP is formed on one surface of the electronic device 10.
  • the display device DP is formed on the front surface of the electronic device 10 and implemented as a touch screen panel which simultaneously performs a function as an input device. Can be.
  • the display device DP performs not only the touch generating means (for example, a finger or the like) contact and the contact location but also a recognition function for the fingerprint of the finger.
  • the touch generating means for example, a finger or the like
  • the display device DP may function as a touch screen for driving a specific function
  • the fingerprint input window FP is displayed through the display device DP.
  • the fingerprint recognition function may be implemented in the area of or the entire area of the display device DP.
  • the touch by the touch generating means or the ridge of the finger fingerprint and the valley (valley) contact is made by a plurality of rows and columns of sensors, for the fingerprint fingerprint recognition of the ridge and the valley You must be able to distinguish between contacts. Therefore, the resolution of the touch sensing related to the number of sensors included in the display device DP should be formed to distinguish the ridges of the fingerprint and the contact of the valleys.
  • 2A to 2D are cross-sectional views illustrating a configuration of a display device having an image sensing function according to an exemplary embodiment of the present invention.
  • 2A to 2D illustrate an example in which an image sensing function is integrated in a liquid crystal display (LCD).
  • LCD liquid crystal display
  • the liquid crystal display includes a first substrate 210, a thin film transistor layer 220, a liquid crystal layer 230, a color filter layer 240, a second substrate 250, and the like, which are sequentially stacked. It consists of a cover window 260.
  • liquid crystal display In the liquid crystal display, light emitted from a back light unit (BLU) disposed below the first substrate 210 passes through the liquid crystal layer 230, and then extracts color in pixel units to implement color. While passing through the color filter layer 240 operates on the principle that the desired color and image are implemented.
  • the thin film transistor layer 220 functions to transmit or control an electrical signal, and the liquid crystal present in the liquid crystal layer 230 controls light transmission by changing a molecular structure according to an applied electrical signal.
  • the sensor array layer 300 which performs a touch sensing or fingerprint recognition function, that is, an image sensing function of the touch generating means may be disposed in a portion of the liquid crystal display.
  • the sensor array layer 300 may be disposed in close proximity to the color filter layer 240.
  • the sensor array layer 300 may be disposed in the lower region of the color filter layer 240 or in the region between the color filter layer 240 and the second substrate 250.
  • the sensor array layer 300 may be disposed between the second substrate 250 and the cover window 260, as shown in FIG. 2C,
  • the cover window 260 may be disposed on the cover window 260 to protect the display device.
  • a separate protective layer 270 for protecting the sensor array layer 300 should be further formed thereon. will be.
  • the sensor array layer 300 may be formed on the same layer as the thin film transistor layer 220 in which circuits for driving the display device are implemented.
  • a display device is implemented as a liquid crystal display device.
  • the display device may be an organic light emitting diode (OLED) display device or an electrophoretic display (EPD). Of course, it may be implemented.
  • OLED organic light emitting diode
  • EPD electrophoretic display
  • the organic light emitting diode display has a structure in which an organic light emitting diode device having electrode layers formed on both sides thereof is disposed on a substrate.
  • the sensor array layer 300 having an image sensing function according to an embodiment of the present invention is a substrate. It may be formed on top, or on top of the organic light emitting diode element.
  • FIG. 3 is a plan view illustrating a configuration of a display device according to an exemplary embodiment of the present invention.
  • FIG 3 shows a color filter layer 240 and a sensor array layer 300.
  • the sensor array layer 300 may be formed above or relative to the color filter layer 240.
  • a sensor array including a plurality of touch sensors may be formed on the front of the display, or according to another exemplary embodiment, may be formed on a portion of the display.
  • an area without a touch sensor may be configured such that a step does not occur with an area with the touch sensor through passivation (not shown).
  • the sensor array layer 300 is provided with a plurality of contact sensors SN.
  • the contact sensor SN may be implemented as a capacitive sensor including a plurality of transistors.
  • the color filter layer 240 may include a red pixel R for displaying a red image, a green pixel G for displaying a green image, and a blue pixel B for displaying a blue image.
  • a red pixel (R), one green pixel (G), and one blue pixel (B) form one unit pixel, which may be described as being formed in a matrix form of a plurality of rows and columns. Accordingly, one contact sensor SN may be provided per unit pixel.
  • the contact sensor SN is formed on the layer of the sensor array 300, and the sensing circuit (eg, transistor and wirings) of the contact sensor SN when viewed from the top view includes the color filter layer (
  • the red pixel R, the green pixel G, and the blue pixel B of the 240 are disposed in a non-overlap region, and the pixel electrode of the contact sensor SN is colored as a transparent electrode material such as ITO. It may be disposed in a region covering at least a portion of the pixel R, G, or B or in a region not covering the color pixel.
  • the sensing circuit eg, transistor and wirings
  • the contact sensor SN is provided below the unit pixel, but the contact sensor SN may be provided on the upper side, the side surface, or the like of the unit pixel.
  • the sensing circuit of the contact sensor SN may be positioned at a corresponding position by making the size of one of the red pixel R, the green pixel G, and the blue pixel B relatively small.
  • the contact sensor SN may include the red pixel R and the green of the color filter layer 240 from the sensor array 300 layer to the sensing circuit as well as the pixel electrode when the transparent electrode material for the transistor and the wiring is used. It may be formed to overlap the pixel G and the blue pixel B. According to this, since the contact sensor SN may be formed to cover the unit pixel, two or more contact sensors SN may be disposed per unit pixel to increase the resolution of image sensing, and the unit contact sensor SN may be increased. The sensitivity of image sensing may be improved by increasing the size of.
  • FIG. 4 is a diagram illustrating a configuration of a sensor array layer 300 for implementing an image sensing function according to an embodiment of the present invention.
  • the sensor array layer 300 includes a plurality of scan lines SL1, SL2,, and SLn and a plurality of readout lines RL1, RL2,,, and RL1.
  • Scan signals are sequentially supplied to the plurality of scan lines SL1, SL2, ..., and SLn, and the plurality of readout lines RL1, RL2, ..., RLl receive the signals output from the contact sensor SN and receive the same. Transfer to a readout circuit (not shown) for processing.
  • the scan signals supplied to the plurality of scan lines may be supplied from a scan driver provided in the sensor array layer 300.
  • the scan lines SL1, SL2,..., And SLn and the readout lines RL1, RL2,..., And RLl are arranged to cross each other. At least one contact sensor SN may be formed at each intersection.
  • FIG. 5 is a circuit diagram illustrating a comparative example of the contact sensor SN disposed on the sensor array 300.
  • the touch sensor SN may include a pixel electrode (not shown), a switching transistor T1, and a sensing transistor T2.
  • the contact means contacts the pixel electrode, the contact capacitance C1 may be reduced. Can be formed.
  • the gate electrode and the drain electrode of the switching transistor T1 are connected to the first scan line SL1, and the source electrode is connected to the node where the contact capacitor C1 is formed. Meanwhile, the drain electrode of the sensing transistor T2 is connected to the readout line RL, the source electrode is connected to the source electrode of the switching transistor T1, and the gate electrode is connected to the second scan line SL2.
  • FIG. 5B compared with FIG. 5A, there is a difference in which the drain electrode of the switching transistor T1 is connected to the data line DL instead of the first scan line.
  • the switching transistor T1 When the selection signal of the first scan line SL1 is supplied to the gate electrode of the switching transistor T1, the switching transistor T1 is turned on to charge the contact capacitor C1. When the selection signal is applied to the second scan line SL2, the sensing transistor T2 is turned on and the charges charged in the contact capacitor C1 are parasitic capacitances of the contact capacitor C1 and the readout line RL. Can be shared by
  • a large contact capacitance C1 is formed between the contact means and the contact sensor SN, and when the contact means moves away from the contact sensor SN. The size of the contact capacitance C1 is reduced.
  • the signal voltage of the readout line RL is transferred to a separate IC chip, and it is possible to determine whether the screen is in contact with the corresponding pixel, the contact area, etc. based on the transmitted signal voltage.
  • the readout line RL senses a signal corresponding to the amount of charge charged in the touch sensor SN with a voltage, and the contact state and the contact state can be determined through the magnitude of the sensed voltage.
  • the charge stored in the contact capacitor C1 is transferred to the readout line RL through the sensing transistor T2.
  • the contact sensor SN senses a voltage through charge sharing between the contact capacitance C1 and the parasitic capacitance of the lead-out line RL, the parasitic capacitance of the lead-out line RL is relative to the contact capacitance C1.
  • the sensed voltage becomes very small.
  • FIG. 6 is an equivalent circuit diagram illustrating a configuration of a capacitive touch sensor applicable to a display device according to an exemplary embodiment of the present invention.
  • the touch sensor SN according to the exemplary embodiment of the present invention is provided in at least a portion of the unit pixel formed on the sensor array 300 described with reference to FIG. 3.
  • Each contact sensor SN may include a pixel electrode and three transistors, and each of the three transistors may include a reset transistor T1, an amplifying transistor T2, and a detection transistor T3. Can be.
  • each of the transistors T1 to T3 may include a silicon-based transistor or a channel region such as amorphous silicon (a-Si: H), polycrystalline silicon (Poly Silicon, Poly-Si), or an oxide transistor.
  • An organic compound transistor such as an organic thin film transistor formed of a material may be implemented.
  • Each transistor T1 to T3 may be implemented in a coplanar, staggered, inverted coplanar, or inverted staggered thin film transistor structure.
  • each of the transistors T1 to T3 may be formed of a transparent thin film transistor (TTFT).
  • TTFT transparent thin film transistor
  • the transparent thin film transistor is characterized by passing the wavelength of the visible light region, and thus can be seen even when combined with the display device.
  • the reset transistor T1 constantly resets the remaining charge of the pixel electrode connected to the amplifying transistor T2.
  • the gate electrode of the reset transistor T1 may be connected to the scan line SLn, the source electrode may be connected to the power input terminal Vdd, and the drain electrode may be connected to the pixel electrode.
  • the amplifying transistor T2 receives the voltage V1 applied to the contact capacitance C1 generated between the contact means and the pixel electrode as the gate electrode, and detects the detection transistor T3 as a current signal by the amount of change of the voltage V1. Acts as an amplifier to pass
  • a gate electrode of the amplifying transistor T2 may be connected to a sensing electrode, a source electrode may be connected to a power input terminal Vdd, and a drain electrode may be connected to a drain electrode of the sensing transistor T3.
  • the detection transistor T3 serves to selectively pass the current flowing in the amplifying transistor T2 to the readout line RL.
  • the detection transistor T3 transfers the current flowing through the amplifying transistor T2 to the readout line RL by the selection signal applied from the scan line SLn + 1 applied to the gate electrode.
  • the gate electrode of the detection transistor T3 may be connected to the scan line SLn + 1, the drain electrode may be connected to the drain electrode of the amplifying transistor T2, and the source electrode may be connected to the readout line RL.
  • each of the transistors T1 to T3 is formed of a non-transparent or semi-transparent electrode material
  • an electrode edge is secured to secure display visibility.
  • it may be disposed in an area that does not overlap with the color filter.
  • each of the transistors T1 to T3 when each of the transistors T1 to T3 is formed of a transparent electrode material, the transistors T1 to T3 may be disposed in an area overlapping the color filter.
  • FIG. 7 to 9 are equivalent circuit diagrams showing the configuration of a capacitive touch sensor according to another embodiment of the present invention.
  • the source electrode of the reset transistor T1 may be connected to the gate electrode instead of the power input terminal Vdd, so that when the selection signal is applied from the scan line SLn to the gate electrode, the same selection is made on the source electrode.
  • the signal may be applied so that a separate power input terminal may not be required to drive the contact sensor SN.
  • the connection state of the reset transistor T1 may be changed in the configuration of the contact sensor SN disclosed in FIG. 7.
  • the source electrode and the gate electrode of the reset transistor T1 are tied together and connected to the scan line SLn.
  • the source electrode and the gate electrode of the reset transistor T1 are bundled together. It can be connected to the input terminal Vdd.
  • the power input terminal line in which the source electrode and the gate electrode of the reset transistor T1 are bundled and connected together may be replaced with a data line to which a predetermined voltage is applied.
  • the circuit of the contact sensor SN By configuring the circuit of the contact sensor SN as described above, it is possible to reduce the number of scan lines SLn required to drive each contact sensor SN. Overall, the number of scan lines SLn is reduced by one, but the operation of the scan driver can be simplified since the scan lines required to drive each contact sensor SN are reduced from two to one.
  • the power input terminal Vdd may be removed and the driving of the contact sensor SN may be performed only by the scan line SLn.
  • the source electrode of the amplifying transistor T2 is operated by receiving a voltage input from the scan line SLn instead of the power input terminal Vdd.
  • the scan driver transmits a signal at an operation timing of the amplifying transistor T2. Can be driven.
  • the circuit structure of the contact sensor SN can be further simplified by design.
  • the power input terminal Vdd may be a data line DL, and the voltage applied to the data line may be a data signal.
  • FIG. 10 is a timing diagram for describing an operation of the touch sensor SN according to an exemplary embodiment of the present invention.
  • SLn and SLn + 1 denote signals supplied to corresponding scan lines SLn and SLn + 1, respectively, and a selection signal is supplied to scan lines SLn and SLn + 1 during a high period.
  • the specific contact sensor SN is selected by the application of the selection signal, and a signal from the other contact sensor SN is output.
  • SL will be referred to as a scan line signal.
  • RL Reset is a signal for resetting the readout line RL. A reset signal is supplied in a high section, and the readout line RL is reset.
  • V1 represents the potential of the sensing electrode connected to the gate electrode of the amplifying transistor T2, that is, the potential due to the electric charge charged in the contact capacitor C1 generated between the contact means and the pixel electrode, and RL is detected.
  • the amount of current detected in the readout line RL connected to the source electrode of the transistor T3 is shown.
  • the potential V1 according to the amount of charge charged in the contact capacitance C1 depends on whether the ridge or the valley touches the sensing transistor T1 of the contact sensor SN.
  • the current of the readout line RL is changed.
  • the reset transistor T1 When the scan line signal SLn connected to the gate electrode of the reset transistor T1 is switched to the high level (S2), the reset transistor T1 is turned on and connected to the source electrode of the reset transistor T1. A certain amount of charge is charged in the pixel electrode connected to the drain electrode of the reset transistor T1 through the voltage input through the power input terminal Vdd, thereby increasing the voltage V1.
  • the source electrode of the amplifying transistor T2 is also connected to the power input terminal Vdd to receive an input voltage.
  • the relationship between the gate voltage V1 and the source electrode of the amplifying transistor T2 exceeds the threshold voltage of the amplifying transistor T2. Since it is designed so that no current flows from the drain electrode of the amplifying transistor T2 to the detection transistor T3, no current is detected even in the lead-out line RL.
  • a contact capacitance C1 is formed between the contact means and the contact sensor SN, each having a different size when the bone is in contact with the ridge.
  • the contact capacitance C1 of is formed.
  • the reset transistor T1 As the selection signal is applied to the scan line SLn connected to the gate electrode of the reset transistor T1 in the period S2, the reset transistor T1 is turned on so that the signal from the power source input terminal Vdd is reset. ) Is delivered through the drain electrode of the capacitor), thereby charging the contact capacitance C1.
  • the contact capacitance C1 varies depending on the distance between the pixel electrode and the contact means.
  • the contact capacitance formed when the valley of the fingerprint and the pixel electrode are in contact with each other is larger than the contact between the ridge of the fingerprint and the pixel electrode. (C1) is small in size.
  • the detection transistor T3 is turned on.
  • a current flowing from the drain electrode of the amplifying transistor T2 flows through the drain electrode of the detection transistor T3 to the source electrode, and finally the current flows through the readout line RL.
  • the voltage V1 of the contact capacitance C1 is low, the current flowing in the lead-out line RL may be smaller than that of the ridge contact.
  • the detection transistor T3 is turned on, and a current flowing from the drain electrode of the amplifying transistor T2 is sourced from the detection transistor T3. Flow through the electrode to the drain electrode. The current is detected in the readout line RL, but since the coupling due to parasitic capacitance does not occur, the gate electrode potential of the amplifying transistor T2 is kept constant. Will flow.
  • the reset of the circuit is performed by the reset transistor T1 when a signal is applied to the scan line, there is an advantage of not requiring a separate reset line.
  • a separate wiring other than the scan line is not required, and thus the circuit can be simply configured.
  • the selection signal is applied to the scan line connected to the gate electrode of the detection transistor T3
  • the gate electrode of the reset transistor T1 of the other contact sensor SN is also connected to the corresponding scan line, so that one scan It is possible to simultaneously control the signal detection at the lead-out line RL included in one contact sensor SN and the operation of the sensing transistor T1 included in another contact sensor SN.
  • the amplification transistor T2 may operate according to the change of the contact capacitance C1, thereby reducing the disadvantage that the signal detected by the charge sharing circuit becomes small.
  • the transparent thin film transistor and the transparent electrodes are used, and the opening ratio of the display device can be improved by forming an opening in the center of the pixel electrode.
  • FIG. 11 is a plan view of a touch sensor according to an embodiment of the present invention.
  • T1 is a reset TR shown in the upper left of FIG. 10
  • T2 is an amplified TR shown in the lower left
  • T3 is a detection TR shown in the lower right. Read TR) respectively.
  • the gate electrode RG of the reset transistor T1 is connected to the scan line SLn, the source electrode RS is connected to the power input terminal DL, and the drain electrode RD is connected to the pixel electrode Sensing Electode. Can be.
  • the gate electrode AG of the amplifying transistor T2 is connected to the sensing electrode through the contact Con, the source electrode AS is connected to the power input terminal DL, and the drain electrode AD is detected. It may be connected to the source electrode RS of the transistor T3.
  • the gate electrode RG of the detection transistor T3 is connected to the scan line SLn + 1, the source electrode RS is connected to the drain electrode AD of the amplifying transistor T2, and the drain electrode RD is It may be connected to the lead-out line RL.
  • T1 to T3 when T1 to T3 are implemented as an oxide transistor, the characteristics of the oxide may vary according to incident light, and thus may further include a shield electrode SD.
  • the shield electrode SD may be disposed on the T1 to T3 in a state overlapping with the T1 to T3 to block external light.
  • a contact capacitor C1 is formed between the contact means and the pixel electrode Sensing Electrode, and the voltage V1 applied to the contact capacitor C1 is input to the gate electrode AG of the amplifying transistor T2.
  • a current signal that is formed differently according to a change amount of the voltage V1 input to the gate electrode AG of the amplifying transistor T2 may be transmitted to the detection transistor T3.
  • the size of the contact capacitor C1 is larger as the contact area between the finger and the sensing electrode becomes larger.
  • the area occupied by the T1 to T3 can be minimized and the area occupied by the pixel electrodes can be maximized.
  • the T1 to T3 display the color pixels R and G as shown in FIG. 2.
  • B) may be implemented as an area not overlapping with the pixel, and may be implemented as an area overlapping with the color pixel pixel by using the pixel electrode as a transparent electrode. In this case, fingerprint image scanning is possible without compromising the visibility of the display.
  • FIG. 12 is a plan view illustrating a sensor array in which a plurality of touch sensors are arranged according to another exemplary embodiment.
  • FIG. 13 is an enlarged plan view of a touch sensor of a unit pixel illustrated in FIG. 12.
  • the sensor array 400 includes a plurality of contact sensors PA.
  • Each contact sensor PA is connected to one data line DL1, one lead out line RL, and two scan lines SL n and SL n + 1.
  • DL1 data line
  • RL lead out line
  • SL n and SL n + 1 scan lines
  • M M x N array
  • one unit contact sensor is connected to the data line DL, the lead-out line RL, and the scan line SL, and reset transistor.
  • Reset TR, T1 amplifying transistors
  • Amp TR, T2 amplifying transistors
  • Read TR, T3 detection transistors
  • SE pixel electrode
  • the entire surface of the unit contact sensor PA is overlapped with the pixel electrode SE without the shield electrodes overlapping the T1 to T3.
  • the pixel electrode is connected to the drain electrode RD of the reset transistor T1 and the gate electrode AG of the amplifying transistor T2 through a contact.
  • FIG. 14 is a cross-sectional view taken along line AA ′ of the touch sensor of the unit pixel shown in FIG. 12, and FIG. 15 is a cross-sectional view taken along line BB ′ of the touch sensor of the unit pixel shown in FIG. 12. It is sectional drawing along the CC 'diagram of the contact sensor of the unit pixel shown in FIG.
  • each of the transistors forms a gate over the substrate and forms a gate insulating layer.
  • the source / drain electrodes are patterned by a photolithography process.
  • the reset transistor T1 at the lower left includes a source / drain electrode, a gate electrode, a gate insulating layer G / I, and an active layer.
  • the substrate may be a material such as glass, film, plastic (Plastic PI), stainless steel.
  • the source / drain electrode or the gate electrode of the reset transistor T1 may be formed of a single material or a synthetic material such as ITO, IZO, Mo, Al, Cu, Ag, Ti, or the like.
  • the active region between the source / drain electrodes may be oxide based materials such as a-Si: H, low temperature polysilicon (LTPS), indium gallium zinc oxide (IGZO), organic materials, etc. Can be implemented.
  • the gate insulating layer G / I may be implemented with SiO 2 , SiN X, or the like.
  • the reset transistor T1 may further include an edge stopper.
  • An edge stopper (E / S) may be implemented with materials such as SiO 2 and SiN X. The edge stopper protects the active layer previously formed by the chemical during the photolithography process for forming the source-drain electrode, thereby preventing the active region from being damaged.
  • the contact sensor PA Before forming the pixel electrode on the reset transistor T1, the contact sensor PA forms a passivation layer for uniformizing the surface, and the passivation layer includes thin-glass, SiO 2 , and SiN ⁇ . It can be implemented with a transparent material such as.
  • the drain electrode RD is connected to the pixel electrode SE as described with reference to FIG. 12. 11 and 12, the pixel electrode is connected to the drain electrode RD through a contact CON passing through the passivation.
  • the pixel electrode SE may be implemented as a single material or a synthetic material having transparency such as ITO, IZO, Mo, Al, Cu, Ag, Ti, and the like.
  • the amplification transistor T2 at the lower left is formed on a substrate, and includes a source / drain electrode, a gate electrode, a gate insulating layer (G / I), and It includes an active layer.
  • the detection transistor T3 at the lower right is formed on a substrate and includes a source / drain electrode, a gate electrode, a gate insulating layer G / I, and an active layer.
  • the substrate may be a material such as glass, film, plastic (Plastic PI), stainless steel.
  • the reset transistors are formed. It may be the same as the material of (T1).
  • the amplifying transistor T2 and the detection transistor T3 may further include an edge stopper.
  • the edge stopper (E / S) may be implemented with materials such as SiO 2 and SiN ⁇ .
  • the edge stopper protects the active layer previously formed by the chemical during the photolithography process for forming the source-drain electrode, thereby preventing the active region from being damaged.
  • the contact sensor PA forms a passivation layer for making the surface even before forming the pixel electrode on the reset transistor T1, the amplifying transistor T2, and the detection transistor T3, and the passivation layer is a thin film. It can be implemented with a transparent material such as glass (Thin-Glass), SiO 2 , SiN ⁇ .
  • the gate electrode AG of the amplifying transistor and the drain electrode RD of the reset transistor are connected, and as shown in FIGS. 13 and 16, a pixel electrode overlapping the contact sensor is connected with the gate electrode of the amplifying transistor. .
  • FIG. 17 illustrates a side view of a touch sensor according to another embodiment of the present invention. For convenience of explanation, the difference from FIG. 14 will be mainly described.
  • each of the transistors T1 to T3 forms a gate on a substrate and forms a gate insulating layer.
  • the source / drain electrodes are patterned by a photolithography process.
  • the edge stopper region may be further included before the source / drain electrode patterning to protect the active layer.
  • the pixel electrode may be formed on the opposite side of the substrate on which the transistors are formed.
  • the pixel electrode is connected to the drain electrode of the reset transistor and the gate electrode of the amplifying transistor by drilling a via in the substrate.
  • the touch sensor in this embodiment may further include a passivation layer, that is, a protective layer on the pixel electrode, so that the pixel electrode is not damaged by the contact of the contact means.
  • the passivation layer may be formed of a transparent material such as thin glass, ultra-thin glass, SiO 2 , SiN ⁇ , or the like.
  • FIG. 18 is a plan view of a sensor array in which a plurality of touch sensors are arranged according to another exemplary embodiment.
  • FIG. 19 is an enlarged plan view of a touch sensor of a unit pixel illustrated in FIG. 18.
  • the sensor array includes a plurality of contact sensors PBs.
  • the contact sensors PB are symmetrically arranged with other contact sensors in one direction.
  • the first contact sensor PB1 to the third contact sensor PB3 are arranged side by side in one direction, that is, in a row direction.
  • the first contact sensor PB1 is symmetrical with respect to the side contacting the second contact sensor PB, that is, the lead-out line RL or the data line DL.
  • the second contact sensor PB2 and the third contact sensor PB3 are symmetrical with respect to the abutting side.
  • adjacent contact sensors are not arranged symmetrically in the other direction, that is, in the column direction.
  • the first contact sensors PB1 are not arranged symmetrically with respect to the sides contacting the fourth contact sensors PB4, that is, the scan lines.
  • a pair of contact sensors arranged in one direction are symmetrical with respect to the data line DL. That is, the reset transistor, the amplifying transistor, the detection transistor, the pixel electrode, and the signal lines DL, RL, and SL are arranged to be symmetrical with each other.
  • data lines may be separately arranged for each touch sensor, but according to another exemplary embodiment, one data line serving as a symmetric reference line may be arranged in two adjacent contact sensors. Can be shared by. As a result, the number of signal wires is reduced, and the aperture ratio by the touch sensor is larger than that of the display unit pixels, so that display visibility can be improved.
  • 20 is a plan view of a touch sensor according to another embodiment of the present invention.
  • the touch sensor includes a reset transistor, an amplifying transistor, a detection transistor, a pixel electrode SE, and signal lines DL, RL, and SL.
  • the pixel electrode is formed via a contact between the drain electrode of the reset transistor and the gate electrode of the amplifying transistor on a plane different from the transistor.
  • the pixel electrode may be formed to have a maximum area that can cover the unit touch sensor size while being independent of the adjacent contact sensor.
  • the pixel electrode may be implemented as a single material or a synthetic material having permeability such as ITO, IZO, Mo, Al, Cu, Ag, Ti, or the like.
  • the amplifying transistor, the source electrode, the drain electrode, or the gate electrode of the detection transistor when the contact sensor is formed to overlap the display unit pixel, the aperture ratio of the display pixel is lowered. There is a fear that the display visibility is lowered.
  • the light blocking area ie, the black pixel
  • Transistors T1 to T3 may be disposed toward the region.
  • the light blocking area is a region in which driving elements for displaying a display are disposed to transmit light
  • the transistors and signal wirings of the touch sensor may be formed into the light blocking area, thereby preventing visibility of the display.
  • FIG. 21 is a simplified exploded perspective view of a display device including a touch sensor according to another exemplary embodiment of the present invention
  • FIG. 22 is a diagram illustrating a schematic arrangement of the touch sensor of the display device of FIG. 21.
  • the display device DP includes a display module 510, an adhesive layer 520, a contact sensor module 530, and a cover window 540.
  • a display area in which an image is displayed is formed, and the display module 510 is disposed in the display area and includes the plurality of unit pixels for displaying an image.
  • an organic light emitting diode OLED May be a display module or a liquid crystal display (LCD) display module.
  • a sensing region overlapping the display area is formed in the touch sensor module 530, and the touch sensor module 530 includes a transparent substrate 531 and a plurality of touch sensors SN disposed on one surface of the transparent substrate 531. ), An integrated circuit package 532 for transmitting a control signal to the contact sensors SN or receiving a detection signal from the contact sensors SN, and the control signal from the outside to the integrated circuit package 532.
  • Flexible Printed Circuit Board (FPCB) 533 for delivery.
  • the unit pixels of the display module 510 may be overlapped 1: 1 with the contact sensors SN of the touch sensor module 530.
  • the touch sensors SN disposed on the display device DP may include a cover window 540 disposed above the touch sensor module 530, like the touch sensors SN disclosed in FIGS. 6 to 9.
  • a cover window 540 disposed above the touch sensor module 530, like the touch sensors SN disclosed in FIGS. 6 to 9.
  • the touch sensor SN has been described as a configuration disposed on the transparent substrate 531 of the display module 510, the touch sensor SN without the separate transparent substrate 531 may cover the cover window 540. It is also possible to configure the arrangement on one side of).
  • the first contact sensor SN1 and the second contact sensor SN2 adjacent to the first contact sensor SN1 are a ridge and valley of the user fingerprint 9, respectively.
  • the transistor unit TFT1 and the second thin film transistor unit TFT2 are included.
  • the first thin film transistor unit TFT1 and the second thin film transistor unit TFT2 may include at least one of a reset transistor, an amplifying transistor, and a detection transistor of the contact sensor SN1 described with reference to FIGS. 6 to 9.
  • the first thin film transistor unit TFT1 and the second thin film transistor unit TFT2 are formed on the same plane as the first pixel electrode SE1 and the second pixel electrode SE2 and wirings (not shown) for providing a signal. Can be placed in.
  • the first pixel electrode SE1, the second pixel electrode SE2, the first thin film transistor unit TFT1, the second thin film transistor TFT2 unit, and the wirings are thin films of a transparent material having a predetermined light transmittance.
  • a transparent material having a predetermined light transmittance.
  • ITO indium tin oxide
  • CNT silver nano-tube
  • IZO indium zinc oxide
  • a separation space 539 is formed between the first contact sensor SN1 and the second contact sensor SN2, and an insulating material such as resin is disposed in the separation space 539, so that the first contact sensor is disposed.
  • the SN1 and the second contact sensor SN2 may be insulated from each other.
  • the first contact sensor SN1 and the separation space 539 form one sensing pitch Pitch
  • the width W2 of the sensing pitch Pitch is the width W11 of the first contact sensor SN1. It is equal to the sum of the width W12 of the spaced apart space 539.
  • the width W2 of the sensing pitch is in the range of 5 um to 200 um. It is formed as one.
  • FIG. 23 is a view showing a schematic arrangement of a touch sensor according to another embodiment of the present invention
  • FIG. 24 is a plan view of the touch sensor of FIG.
  • the contact sensor SN according to the present embodiment differs in the arrangement of the contact sensor SN, the other configuration is substantially the same as that of the contact sensor SN of FIGS. 21 and 22. It demonstrates centering on the characteristic part of this embodiment.
  • the electrode SE2 is disposed under the lower surface of the cover window 540, and the first thin film transistor unit TFT1 and the first wiring Wi1, and the second thin film transistor unit TFT2 and the second wiring Wi2 are connected to each other.
  • the first pixel electrode SE1 and the second pixel electrode SE2 are disposed below the first pixel electrode SE1 and the second pixel electrode SE2, respectively.
  • the first thin film transistor unit TFT1 and the second thin film transistor unit TFT2 may include at least one of a reset transistor, an amplifying transistor, and a detection transistor of the contact sensor SN described with reference to FIGS. 6 to 9.
  • the first wire Wi1 and the second wire Wi2 may be at least one of a part of a scan line, a part of a data line, and a part of a readout line of the contact sensor SN described with reference to FIGS. 6 to 9. That is, the pixel electrodes SE1 and SE2 are disposed in a shape that covers some or all of the reset transistor, the amplifying transistor, the detection transistor, a part of the scan line, a part of the data line, and a part of the readout line. Can be.
  • the pixel electrodes SE1 and SE2, the reset transistor, the amplifying transistor, the detection transistor, the scan line, the data line, and the readout line are formed of a transparent conductive material such as IZO, ITO, or the like, and thus the contact sensor module 530.
  • Light generated by the display module 520 disposed under the) may pass through the contact sensors SN of the touch sensor module 530 and may be projected to the outside.
  • the pixel electrodes SE1 and SE2 of the contact sensor SN may be formed to be wider than the transistors TFT1 and TFT2 and the wirings Wire1 and Wire2, and thus may be formed to be wider. Interference due to parasitic capacitances formed in the TFT1 and the TFT2 and the wirings Wire1 and Wire2 can be suppressed, so that the contact sensing sensitivity of the user fingerprint can be improved.
  • FIG. 25 is a view illustrating a state in which a display device including a touch sensor is driven in a touch recognition mode according to another exemplary embodiment of the present invention.
  • the display device including the touch sensor according to the present embodiment differs only in the method of driving the touch sensor, the display device is the same as the configuration of the display device including the touch sensor described in FIGS. 1 to 24. In the following description, the characteristic parts of the present embodiment will be described.
  • the touch sensor module 530 of the display device DP may include a plurality of touch sensor sectors including two or more touch sensors SN among the plurality of touch sensors SN. (SS1, SS2, SS3, SS4).
  • the touch sensor module 530 When the touch sensor module 530 is driven in the touch recognition mode, some of the touch sensors SN included in the plurality of touch sensor sectors SS1, SS2, SS3, and SS4 are selected, To be activated.
  • the touch sensor module 530 is basically driven in the touch recognition mode, and when all the touch sensors SN are all selected as only some touch sensors SN are activated. Compared with this, power consumption can be reduced.
  • the contact sensor SN becomes active, that is, the activated is that the scan signal and the data signal are applied to the contact sensor SN, so that the contact sensor SN is selected and placed on the surface of the display device DP. It means a state in which the contact sensor SN can detect whether the contact means is in contact.
  • the contact sensor sectors SS1, SS2, SS3, and SS4 of the touch sensor module 530 may overlap the display area in which the unit pixels of the display device DP are disposed to display an image.
  • the sensing area is partitioned and includes a plurality of contact sensors SN disposed in the partitioned area.
  • the contact sensor sectors SS1, SS2, SS3, and SS4 are formed in a rectangular shape, for example, and any contact sensor sectors SS1, SS2, SS3, and SS4 are interposed between the contact sensor sectors SS1, SS2, SS3, and SS4.
  • Contact sensors SN which are not included in the present invention, are disposed to be spaced apart from each other by the width of at least one contact sensor SN between the contact sensor sectors SS1, SS2, SS3, and SS4.
  • the touch sensor module 530 When the touch sensor module 530 is driven in the touch recognition mode, some of the touch sensors SN included in the touch sensor sectors SS1, SS2, SS3, and SS4 of the touch sensor module 530 may be touched. ) Is activated, and the activated contact sensors SN may detect whether a contact means, for example, a user's finger, is touched on the surface of the display device DP.
  • a contact means for example, a user's finger
  • the touch sensors SN A activated in the touch sensor sectors SS1, SS2, SS3, and SS4 are the contact sensor sectors SS1, SS2,
  • the contact sensors SN I disposed on the edge portions of the SS3 and SS4 and disposed inside the edge are kept in an inactive state.
  • the contact sensor sectors SS1, SS2, SS3, and SS4 of the touch sensor module 530 have been described as being formed in a rectangular shape, the contact sensor sectors SS1, SS2, SS3, and SS4 may be formed. It is also possible to form a polygon or circle other than a square.
  • FIG. 26 is a view illustrating a driving state of the touch sensor array in the display device of FIG. 25, and FIG. 27 is a timing diagram for describing an operation of the touch sensor of FIG. 26.
  • a first scan line DL1 to a fifth data line DL5 for providing a data signal to the contact sensor SN are disposed in one direction and have a first scan for providing a selection signal.
  • the lines SL1 to fourth scan line SL4 are arranged to intersect the first data line DL1 to the fifth data line DL5.
  • Each of the contact sensors SN is disposed at a point where the first data line DL1 to fifth data line DL5 and the first scan line SL1 to fourth scan line SL4 cross each other.
  • the power input line VDD of FIGS. 6 to 9 may correspond to the data line of FIG. 26, and is not limited to the term, and refers to a line to which a constant voltage is applied.
  • the first readout line RL1 to the fourth readout line RL4 are disposed in parallel with the first data line DL1 to the fifth data line DL5, and are respectively connected to the respective contact sensors SN.
  • the readout signal which is a current signal corresponding to the contact capacitance of the contact sensors SN, is detected in the first readout line RL1 to the fourth readout line RL4.
  • the scan signals applied to the first scan line SL1 to the fourth scan line SL4 are sequentially formed, that is, time-series, and are formed on the first data line DL1 to the fifth data line DL5.
  • the applied data signals are formed independently of each other.
  • the touch sensor module 530 is driven in the touch recognition mode to activate the touch sensor SN disposed at the edge of the touch sensor sectors SS1, SS2, SS3, and SS4, and activate the touch sensor SN.
  • the process of detecting the readout signal from these devices will be described in detail. A case where the data signal, the scan signal, and the readout signal are applied or detected is high, and a case where the data signal, the scan signal, and the readout signal is not applied is called low.
  • the first scan signal is applied to the first scan line SL1 from the first reference time t1 to the second reference time t2.
  • the first data signal to the fourth data signal are input to the first data line DL1 to the fourth data line DL4, and the first scan line SL1 and the first data line DL1 to fourth data are input. All of the contact sensors SN A disposed at the intersection with the line DL4 are activated.
  • a second scan signal is applied to the second scan line SL2 from the second reference time t2 to the third reference time t3.
  • the first data signal and the fourth data signal are input to the first data line DL1 and the fourth data line DL4, respectively, and to the second data line DL2 and the third data line DL3.
  • the data signal is not input. Therefore, a contact disposed at a point where the second scan line SL2 intersects the second scan line SL2, the first data line DL1, and the fourth data line DL4 during the second reference time t2 to the third reference time t3. Only sensors SN A are activated.
  • a third scan signal is applied to the third scan line SL3 from the third reference time t3 to the fourth reference time t4.
  • the first data signal and the fourth data signal are input to the first data line DL1 and the fourth data line DL4, respectively, and to the second data line DL2 and the third data line DL3.
  • the data signal is not input. Therefore, during the third reference time t3 to the fourth reference time t4, the third scan line SL3 is disposed at a point where the first scan line SL3 intersects with the first data line DL1 and the fourth data line DL4. Only the contact sensors SN A are activated.
  • a fourth scan signal is applied to the fourth scan line SL4 from the fourth reference time t4 to the fifth reference time t5.
  • the first data signal to the fourth data signal is input to the first data line DL1 to the fourth data line DL4, and the fourth scan line SL4 and the first data line DL1 to fourth data are input.
  • the contact sensors SN A disposed on the edges of the contact sensor sectors SS1, SS2, SS3, and SS4 are sequentially activated, and the edges are sequentially activated.
  • the contact sensors SN I disposed therein remain inactive.
  • the touch sensors SN A to which both the scan signal and the data signal are applied are activated, and any one of the scan signal and the data signal is activated. Unapplied contact sensors SN I are not activated.
  • the gate electrode of the detection transistor included in the contact sensors SN is connected to the reset transistors of the contact sensors SN. It is connected to the next scan line of the scan line.
  • the gate electrode of the detection transistor of the contact sensor SN is connected to the second scan line SL2.
  • the contact detection signal of the contact sensor SN activated for a certain reference time may be output at the next reference time.
  • the contact detection signal of the touch sensor SN connected to the first scan line SL1 may be a third reference from a second reference time t2 at which the second scan signal is applied to the second scan line SL2. It is output through the 1st readout line RL1 at the time t3.
  • the touch sensor module 530 when the touch sensor module 530 is driven in the touch recognition mode, only the contact sensors SN A disposed at the edges of the contact sensor sectors SS1, SS2, SS3, and SS4 are activated. However, some of the contact sensors SN of the contact sensors SN disposed inside the edges of the contact sensor sectors SS1, SS2, SS3, and SS4 are activated randomly or regularly, or the contact sensor sectors SS1, SS2, Configurations in which only one contact sensor SN is activated per SS3 and SS4 are also included in the spirit of the present invention.
  • the contact sensors SN included in the contact sensor sectors SS1, SS2, SS3, and SS4 are described as being different from each other, but at least one of the contact sensor sectors SS1, SS2, SS3, and SS4 is included. It is also possible to share the above-mentioned contact sensor SN. In this case, some of the contact sensor sectors SS1, SS2, SS3, and SS4 may overlap each other.
  • FIG. 28 is a view illustrating a state in which contact means is in contact while the display device of FIG. 25 is driven in the touch recognition mode.
  • the display device DP when a contact means such as the user's finger F is in contact with a plurality of contact sensor sectors SS1, SS2, SS3, and SS4 simultaneously, the display device DP according to the present embodiment may be different.
  • the center (C1) of the center that is, the fourth touch sensor sector (SS4) of touch sensor sector (SS4) that includes the contact sensor (SN a) for the greatest number of the touch sensor (SN a) the contact is detected, Determine as the contact point.
  • the display device (DP) that counts the number of each touch sensor sector of a touch sensor (SN A) of the contact sensor (SN A) contacting the detection of the included in the (SS1, SS2, SS3, SS4), and contact
  • the center C1 of the contact sensor sectors SS1, SS2, SS3, and SS4 including the detected maximum number of contact sensors SN A may be determined as the contact point.
  • the display device DP includes, from the centers of the contact sensor sectors SS1, SS2, SS3, SS4 including contact sensors SN A in which contact is sensed, each of the touch sensor sectors includes: The computing center C2 spaced by a weighted average of the number of touch sensors in which the touch is detected may be determined as the touch point.
  • the display device DP is farthest from the center of the first touch sensor sector SS1 including the fewest touch sensors SN A , and the closest touch sensors SN A are the most.
  • the calculation center C2 closest to the center of the fourth contact sensor sector SS4 that is included in a large amount may be calculated to determine the calculation center C2 as a contact point.
  • the present exemplary embodiment in the case of simply detecting whether the user touches the surface of the display device DP, only some of the touch sensors SN may be activated to detect whether the user touches the display. There is an advantage that can minimize the power consumption of the device (DP).
  • 29 to 31 are views illustrating a state in which a display device is driven in a contact recognition mode according to another exemplary embodiment of the present invention.
  • the display devices according to the present embodiments differ only in the configuration of the contact sensor sector, and other configurations are substantially the same as those of the display device described with reference to FIGS. 25 to 28.
  • the explanation focuses on the part.
  • the contact sensors in the unit touch sensor sector SS may be activated and deactivated in various preset patterns according to the recognition sensitivity and the coordinate detection accuracy of the touch recognition mode. More specifically, referring to FIG. 29, the unit touch sensor sector SS of the display device DP according to the present exemplary embodiment is activated touch sensor SN A randomly disposed in an area of the touch sensor sector SS. And deactivated contact sensors SN I.
  • activated contact sensors SN A and inactivated contact sensors SN I are alternately arranged in a predetermined pattern in alternating regions of the unit contact sensor sector SS.
  • At least one activated contact sensor SN A disposed in an area of the unit contact sensor sector SS and an inactivated contact sensor surrounding the activated contact sensor SN A ( SN I ).
  • the activated contact sensor SN A may be disposed at the center of the contact sensor sector SS.
  • FIG. 32 is a diagram illustrating a state in which the display device of FIG. 25 is driven in a full fingerprint recognition mode.
  • the touch sensor module 530 of the display device DP when the touch sensor module 530 of the display device DP according to the present exemplary embodiment is driven in the full fingerprint recognition mode, all the touch sensors SN included in the touch sensor module 530 are active. In this state, the image of the user fingerprint contacted with the surface of the display device DP may be scanned.
  • FIG. 33 is a diagram illustrating a state in which the display device of FIG. 25 is driven in an icon fingerprint recognition mode.
  • the icon fingerprint recognition mode of the display device DP at least one icon ICON S among the plurality of icons displayed on the display module among the plurality of icons ICON displayed on the display module 510. And a plurality of contact sensors SN overlapping with.
  • the security app for example, overlapping with the security icon (ICON S ) connected to the security app (App), such as a mobile banking app (App), an application that requires biometric authentication, or an app set by the user.
  • App such as a mobile banking app (App)
  • an application that requires biometric authentication or an app set by the user.
  • FIG. 34 is a diagram illustrating a state in which the display device of FIG. 25 is driven in an input window fingerprint recognition mode.
  • a plurality of contact sensors SN overlapping with the input window FP displayed on a portion of the display module 510 may be selected.
  • the display device DP selects and activates a plurality of contact sensors SN overlapping the generated input window FP in a user authentication step such as a fingerprint input step of the electronic device 10. Allow user authentication through scanning.
  • the display device DP When the display device DP according to the present exemplary embodiment is the icon fingerprint recognition mode or the input window fingerprint recognition mode, all of the plurality of touch sensors SN overlapping the security icon ICON S or the input window FP are all present. Other touch sensors SN that are activated but not overlapped with the security icon ICON S and the input window FP may be activated with some contact sensors SN classified by the contact sensor sectors SS.
  • 35 is a diagram illustrating a state in which the display device of FIG. 25 is driven in a non-contact recognition mode.
  • the touch sensor module 530 of the display device DP further includes a plurality of touch sensor blocks HB including a plurality of touch sensor sectors SS.
  • the touch sensor module 530 When the touch sensor module 530 is driven in the non-contact recognition mode, the plurality of touch sensor sectors SS included in the plurality of touch sensor blocks HB are activated. In this case, some of the touch sensors SN of the touch sensors SN included in the respective touch sensor sectors may be selected and activated as described with reference to FIGS. 25 to 31.
  • the plurality of contact sensor blocks HB are activated in a mutually overlapping manner as in the manner in which the plurality of contact sensor sectors SS are activated in FIGS. 25 to 31, and detect the non-contact proximity state or the contact state of the contact means P.
  • FIG. can do.
  • the voltage magnitude of the scan signal applied to the touch sensors SN activated from the scan line is larger than that when the touch sensor module 530 is driven in the touch recognition mode and the fingerprint recognition mode.
  • a larger driving voltage is formed in a larger area than the touch recognition mode or the fingerprint recognition mode, a large E-field is formed that can detect proximity even at a predetermined distance from the display device DP. .
  • the display device DP may detect the touch sensor block HB S indicated by the contact means P.
  • the process of detecting the contact means P which is not in contact with the contact sensors SN included in the plurality of contact sensor sectors SS, differs only in the voltage magnitude of the data signal applied thereto. 28, since the touch sensor SN is substantially the same as the configuration of detecting the contact means P, a detailed description thereof will be omitted.
  • the non-contact recognition mode is a hovering mode that detects whether the contact means P is in proximity while the contact means P is not in direct contact with the display area or the sensing area of the display device DP. Can be.
  • FIG. 36 is a schematic block diagram illustrating a configuration of the display device of FIG. 25, and FIG. 37 is a flowchart illustrating a driving process of the display device of FIG. 25.
  • the display device DP transmits a control signal Sc to the touch sensor module 530 and transmits a detection signal SR from the touch sensor module 530.
  • the control unit 700 further includes. Although the control unit 700 according to the present embodiment has been described as a configuration provided separately from the touch sensor module 530, a configuration in which the control unit 700 is included in the touch sensor module 530 is also possible.
  • the control unit 700 of the display apparatus DP determines the sensing mode of the display apparatus DP (S10), and selects activation target contact sensors SN according to the determined sensing mode (S20). Next, the selected touch sensors SN are activated, and a detection signal is transmitted from the activated touch sensors (S30).
  • control unit 70 determines the sensing mode of the display device DP according to the driving state of the electronic device 10 in which the display device DP is installed in the sensing mode determination step S10.
  • some of the touch sensors SN of the touch sensors included in the plurality of touch sensor sectors SS of the display device DP are selected, thereby contacting the display device DP.
  • a touch recognition mode for recognizing whether or not a touch of the touch is performed, a fingerprint recognition mode for scanning an image of a user's fingerprint in contact with the display device SN by allowing more contact sensors SN to be selected than the touch recognition mode, and Some contact sensors SN of the contact sensors SN included in the contact sensor blocks HB may be selected, and a non-contact recognition mode for recognizing whether the contact means is close to the sensing area is further provided.
  • the display device DP When the display device DP is driven in the fingerprint recognition mode, as compared to the case where the display device DP is driven in the touch recognition mode, as the touch device SN is activated, the display device DP is activated. It may have a higher contact recognition resolution to scan a user's fingerprint image.
  • the fingerprint recognition mode may include at least one icon ICON among all the fingerprint recognition modes in which all the contact sensors SN of the display device DP are selected, and a plurality of icons ICON displayed on the display device DP.
  • Icon fingerprint recognition mode for selecting a plurality of touch sensors SN overlapping with S ), and selecting a plurality of touch sensors SN overlapping with the input window FP displayed in a portion of the display device DP.
  • the input window includes a fingerprint recognition mode.
  • the controller 700 determines that the display device DP is in the touch recognition mode, and the electronic device 10 determines the entire area of the display device DP.
  • the controller 700 determines that the display device DP is in the touch recognition mode, and the electronic device 10 determines the entire area of the display device DP.
  • the controller 700 determines that the display device DP is in a non-contact recognition mode. can do.
  • the controller 700 determines that the display device DP is in the icon fingerprint recognition mode.
  • the fingerprint input window FP is formed at 10
  • the controller 700 selects activation target contact sensors SN according to the determined sensing mode (S20).
  • control unit 700 may receive information on the activation target contact sensor SN of each selection mode from a storage provided inside or outside the controller 70 and select the activation target contact sensor SN. have.
  • control unit 70 in the step of activating and detecting the touch sensor S30, through the reset transistor which is turned on by receiving the first selection signal with respect to the selected touch sensor SN, the pixel electrode SE. And a detection capacitor configured to charge a contact capacitance formed between the contact means and the contact means, generate a current varying according to the voltage charged in the contact capacitance through the amplifying transistor, and then turn on to receive the second selection signal.
  • the generated current is detected through the transistor to determine whether the contact means is in contact with the upper portion of the contact sensor SN and whether the contact state is present.
  • the non-contact recognition mode is selected in the sensing mode determination step S10, and the touch sensor activation and detection steps for the contact sensors SN selected according to the non-contact recognition mode are performed, It may be determined whether the voltage value of the detection signal generated by the touch sensor exceeds the non-contact recognition reference voltage V REF .
  • the controller 70 determines that the voltage value V of the detection signal is equal to or lower than the non-contact recognition reference voltage V REF .
  • the touch sensor block HB in which the detection signal is generated is determined as the non-contact recognition center.
  • the controller 70 may activate the touch sensor according to the touch recognition mode when the voltage value V of the detection signal exceeds the non-contact recognition reference voltage V REF in the step of determining whether the non-contact recognition reference voltage is exceeded.
  • the sensing step S30 is performed.
  • the contact means P is close to the display area or the sensing area of the display device DP, the voltage value V of the detection signal detected from the contact sensors SN is determined by the contact means P.
  • the detection signal voltage value V is formed to be smaller than the display area or the sensing area of the display device DP. Therefore, the display device DP according to the present embodiment determines whether the voltage value V of the detection signal exceeds the non-contact recognition reference voltage V REF , so that the contact means P makes the display device DP. It can be determined whether the state is in proximity or contact state with respect to).
  • the fingerprint image of the user may be scanned, or a minute image such as a pin or a brush may be used.
  • a minute image such as a pin or a brush
  • the touch sensor of the display device illustrated in FIGS. 1 to 37 is connected to a power input terminal VDD or a data line to receive a power or data signal.
  • the power input terminal VDD or the data line both refer to a line for applying a voltage having a predetermined magnitude for operating the touch sensor.
  • the power input terminal VDD and the data line are not limited to the term, and are substantially the power input terminal VDD and the data. Lines can be interpreted as concepts corresponding to each other.
  • the present invention relates to a method of driving a display device capable of scanning an image, and is applicable to various display devices, and there is a repeatability, and thus industrial application is possible.

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Abstract

La présente invention porte sur un procédé de commande d'un dispositif d'affichage apte à numériser une image, le dispositif d'affichage comprenant : un module d'affichage comprenant une pluralité de pixels unitaires agencés dans une zone d'affichage dans laquelle une image est affichée ; et un module capteur de contact formant une zone de détection qui chevauche la zone d'affichage, et comprenant au moins un capteur de contact correspondant respectivement aux pixels unitaires, et le procédé comprenant : une étape d'identification de mode de détection consistant à identifier un mode de détection du dispositif d'affichage ; une étape de sélection de capteurs de contact consistant à sélectionner des capteurs de contact à activer, selon le mode de détection identifié ; et une étape d'activation de capteurs de contact et de détection consistant à activer les capteurs de contact sélectionnés et à recevoir des signaux de détection en provenance des capteurs de contact activés.
PCT/KR2015/012026 2014-11-12 2015-11-10 Procédé de commande d'un dispositif d'affichage apte à numériser une image WO2016076592A1 (fr)

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CN201580061784.1A CN107111395A (zh) 2014-11-12 2015-11-10 可扫描图像的显示装置的驱动方法
US15/526,687 US20170351364A1 (en) 2014-11-12 2015-11-10 Method of Driving Display Device Capable of Scanning Image

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KR20140156873 2014-11-12
KR10-2014-0156873 2014-11-12
KR1020150044067A KR20160057285A (ko) 2014-11-12 2015-03-30 이미지 스캔 가능한 표시 장치
KR10-2015-0044067 2015-03-30
KR10-2015-0157052 2015-11-10
KR1020150157052A KR101748123B1 (ko) 2014-11-12 2015-11-10 이미지 스캔이 가능한 표시 장치의 구동 방법

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CN107958193A (zh) * 2017-08-17 2018-04-24 深圳信炜科技有限公司 显示模组及电子设备
US11844236B2 (en) 2019-07-12 2023-12-12 Semiconductor Energy Laboratory Co., Ltd. Functional panel, display device, input/output device, and data processing device
WO2024189360A1 (fr) * 2023-03-14 2024-09-19 Touch Biometrix Limited Capteur et procédé

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CN107958193A (zh) * 2017-08-17 2018-04-24 深圳信炜科技有限公司 显示模组及电子设备
US11844236B2 (en) 2019-07-12 2023-12-12 Semiconductor Energy Laboratory Co., Ltd. Functional panel, display device, input/output device, and data processing device
WO2024189360A1 (fr) * 2023-03-14 2024-09-19 Touch Biometrix Limited Capteur et procédé

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