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WO2011016664A2 - Procédé et appareil de reconnaissance d'entrée tactile - Google Patents

Procédé et appareil de reconnaissance d'entrée tactile Download PDF

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Publication number
WO2011016664A2
WO2011016664A2 PCT/KR2010/005094 KR2010005094W WO2011016664A2 WO 2011016664 A2 WO2011016664 A2 WO 2011016664A2 KR 2010005094 W KR2010005094 W KR 2010005094W WO 2011016664 A2 WO2011016664 A2 WO 2011016664A2
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WIPO (PCT)
Prior art keywords
touch
touch input
signal
conductive pad
input
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Ceased
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PCT/KR2010/005094
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English (en)
Korean (ko)
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WO2011016664A3 (fr
Inventor
이성호
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Individual
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Individual
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Publication of WO2011016664A3 publication Critical patent/WO2011016664A3/fr
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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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • 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
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures

Definitions

  • the present invention relates to a touch input recognition method and apparatus, and more particularly, to a touch input recognition method and apparatus capable of recognizing a GUI object desired by a user even when a plurality of adjacent GUI objects are touched together.
  • the touch panel is attached to a display device such as an LCD, and is an input device that generates a signal corresponding thereto at a contact position when an object such as a finger or a pen contacts.
  • the touch panel may be divided into a resistive type and a capacitive type according to a driving method.
  • the resistive touch panel is a touch panel that detects contact of the conductive layers of the upper and lower substrates with a change in resistance value when an object such as a pen contacts the upper surface of the touch panel.
  • a capacitive type is a touch panel that detects the approach of a finger or a touch means having similar conductivity characteristics using capacitance.
  • various types of touch panels, such as optical and ultrasonic are disclosed. Recently, a multi-touch technology for recognizing a plurality of touch points and a technology for embedding a touch input device in a display device have been developed.
  • a touch input recognition device such as a touch input device additionally installed in the display device or a display device with a built-in touch input device, should have various touch input interfaces.
  • the touch input recognizing apparatus must recognize a touch input corresponding to a graphical user interface (GUI) object.
  • GUI graphical user interface
  • the touch input recognition device must accurately select or activate a GUI object input by the user. do.
  • Conventional resistive touch panels support stylus pen inputs, but the user often does not use the stylus pen or the stylus pen is lost.
  • Conventional capacitive touch panels do not detect narrow cross-sectional areas such as stylus pens. As such, when a GUI object is selected by a finger without using a stylus pen, a contact area of a finger is generally larger than a GUI object, and a plurality of adjacent GUI objects are simultaneously touched.
  • the conventional touch input recognition device has a problem of not correctly recognizing a GUI object desired by the user or malfunctioning.
  • the present invention has been proposed to solve the above problems, and when a plurality of adjacent GUI objects are touched together, the user can select a desired GUI object by recognizing the GUI object with the largest area input as a valid input. It is an object of the present invention to provide a method and apparatus for recognizing a touch input.
  • a touch input recognition method for recognizing a touch input at 200 comprising: (a) receiving a coordinate value of a touch cell 60 in which a touch is made; (b) extracting the GUI object 210 selected by the touch input by reading touch coordinates corresponding to the coordinates of the GUI object 210; (c) determining whether a plurality of adjacent GUI objects 210 are selected; And (d) if a plurality of adjacent GUI objects 210 are selected in step (c), recognizes a touch input to the GUI object 210 in which touch coordinates of the touch cell 60 are detected the most as a valid input signal. It comprises; a.
  • step (d) if the same number of touch coordinates of the touch cell 60 is detected with respect to two or more adjacent GUI objects 210 in step (d), a touch on the GUI object 210 having a higher predetermined priority is detected. Recognize the input as a valid input signal.
  • the priority is determined by the frequency of use of the GUI object 210.
  • the priority is determined by the positional relationship of the GUI object 210.
  • the touch input device 100 is a pressure type touch input device for detecting that one substrate is refracted to the other substrate side facing each other, each of the touch cells 60 is formed on the same substrate A conductor having a pair of conductive pads of the first conductive pad 12 and the second conductive pad 14 spaced apart from each other, and a substrate facing the substrate on which the conductive pad pair is formed is provided with a conductor for mutually conducting the pair of conductive pads. .
  • the touch cell 60 further includes at least one three-terminal switching element 18 for switching energization between the first conductive pad 12 and the second conductive pad 14.
  • the switching device 18 is a thin film transistor (TFT).
  • TFT thin film transistor
  • the switching device 18 is installed in the invisible region 110.
  • the touch input device 100 is a capacitive touch input device for detecting a non-contact touch input of a finger 25 of the body or a touch means having similar electrical characteristics
  • the touch cell 60 is The conductive pad 50 is partitioned and a gate terminal is connected to the conductive pad 50, and includes a three-terminal signal detection switching element 44 for detecting a signal from the conductive pad.
  • the touch cell 60 further includes a three-terminal charge signal switching device 42 for switching and applying a charging signal to the conductive pad 50.
  • the signal detection switching element 44 and the charge signal switching element 42 is a thin film transistor (TFT).
  • TFT thin film transistor
  • the signal detection switching element 44 and the charge signal switching element 42 is provided in the invisible region (110).
  • step (d) if the same number of touch coordinates of the touch cell 60 is detected with respect to two or more adjacent GUI objects 210 in step (d), (d-1) a touch corresponding to the selected GUI object 210. Calculating the size of a capacitor formed between the conductive pad (50) and the touch means in the cell (60); (d-2) comparing the size of the capacitor between the GUI objects 210; And (d-3) recognizing a touch input to the GUI object 210 having the largest capacitor as a valid input signal.
  • the touch input recognition device of the present invention for achieving the above object, the touch input device 100 in which a plurality of touch cells 60 are arranged in a matrix form or a display device having such a touch input device 100
  • a touch input recognition device such as 200 comprising: a touch coordinate receiver 82 for receiving touch coordinates from each touch cell 60 when a touch input is generated for the touch cell 60; An input selector 84 that reads touch coordinates corresponding to the coordinates of the GUI object 210 and extracts the GUI object 210 selected by the touch input; And a valid input selector 86 that recognizes a touch input to the GUI object 210 in which the touch coordinates of the touch cell 60 are detected the most as a valid input signal when a plurality of adjacent GUI objects 210 are selected. It is configured to include.
  • the valid input selector 86 detects the same number of touch coordinates of the touch cell 60 with respect to two or more adjacent GUI objects 210, the GUI object 210 having a predetermined high priority. Recognizes a touch input to as a valid input signal
  • the priority is determined by the frequency of use of the GUI object 210.
  • the priority is determined by the positional relationship of the GUI object 210.
  • the touch cell 60 further includes a touch controller 80 that sequentially drives the column or row direction and detects a touch input from each touch cell 60.
  • the touch input device 100 is a pressure type touch input device for detecting that one substrate is refracted to the other substrate side facing each other, each of the touch cells 60 is formed on the same substrate A conductor having a pair of conductive pads of the first conductive pad 12 and the second conductive pad 14 spaced apart from each other, and a substrate facing the substrate on which the conductive pad pair is formed is provided with a conductor for mutually conducting the pair of conductive pads. .
  • the touch cell 60 further includes at least one three-terminal switching element 18 for switching energization between the first conductive pad 12 and the second conductive pad 14.
  • the switching device 18 is a thin film transistor (TFT).
  • TFT thin film transistor
  • the switching device 18 is installed in the invisible region 110.
  • the touch input device 100 is a capacitive touch input device for detecting a non-contact touch input of a finger 25 of the body or a touch means having similar electrical characteristics
  • the touch cell 60 is And a three-terminal signal detection switching element 44 for detecting a signal from the conductive pad 50 and having a gate terminal connected to the conductive pad 50 formed as a partition and the conductive pad 50.
  • the touch cell 60 further includes a three-terminal charge signal switching device 42 for switching and applying a charging signal to the conductive pad 50.
  • the signal detection switching element 44 and the charge signal switching element 42 is a thin film transistor (TFT).
  • TFT thin film transistor
  • the signal detection switching element 44 and the charge signal switching element 42 is provided in the invisible region (110).
  • the effective input selector 86 detects the same number of touch coordinates of the touch cell 60 with respect to two or more adjacent GUI objects 210, and provides a conductive pad 50 between the GUI objects 210.
  • the touch input to the GUI object 210 having the largest capacitor is recognized as a valid input signal by comparing the size of the capacitor detected from the same.
  • the touch coordinates of the touch cells corresponding to the coordinates of the GUI object are read to extract the GUI object selected by the touch, and when the plurality of adjacent GUI objects is selected, the touch coordinate is most input.
  • the present invention if the number of touch coordinates for the adjacent GUI object is the same, it is not recognized as an error, and the user convenience is improved by selecting the GUI object according to priority such as frequency of use or positional relationship.
  • the size of a capacitor acting on each touch cell is summed for each GUI object, and when the number of touch coordinates for adjacent GUI objects is the same, By selecting a valid GUI object by comparing the sizes, the user can more accurately select the GUI object to be touch input.
  • FIG. 1 is a block diagram showing an example of a touch input recognition device according to the present invention.
  • FIG. 2 is a block diagram showing another example of a touch input recognition device according to the present invention.
  • FIG. 3 is a flowchart showing a touch input recognition method according to the present invention.
  • FIG. 4 is a plan view for explaining a touch input recognition method according to the present invention.
  • FIG. 5 is a plan view illustrating an arrangement of touch cells corresponding to GUI objects
  • FIG. 6 is a circuit diagram showing an example of a pressure type touch panel
  • FIG. 7 is a circuit diagram showing another example of the pressure touch panel
  • FIG. 9 is a circuit diagram illustrating an example of a capacitive touch panel
  • FIG. 10 is a circuit diagram showing another example of a capacitive touch panel
  • 11 illustrates another example of selecting a valid touch input
  • touch input recognition device refers to a touch input device such as a pressure type, capacitive type, optical type, or a display device in which a touch input device is built.
  • the “touch input device” is an input device that replaces a keyboard or a mouse. When a touch input is generated by a stylus pen or a human finger, the “touch input device” is a device that recognizes it as an input signal.
  • the "display device with a built-in touch input device” is a display device in which the above “touch input device” is integrated in the display device.
  • electrodes for sensing a touch may be formed on a color filter or an array substrate (or “TFT substrate”) of an LCD.
  • the LCD with a touch input device may be integrated into an LCD drive IC in which the touch drive IC controls an image display of the LCD.
  • a main CPU such as a mobile terminal may directly process a touch input signal.
  • GUI object refers to an object displayed on an image by a graphic user interface.
  • the GUI object includes an object such as a key object of the keyboard, an execution icon, text, an input button, and the like.
  • a “GUI object” means a unit graphic image which can be touch input by a user.
  • the method and apparatus for recognizing touch input according to the present invention are related to a method and apparatus for accurately selecting a GUI object that a user wants to input when a plurality of GUI objects are simultaneously touched.
  • touch input devices will be illustrated to help understanding of the present invention.
  • the technical idea of the present invention is not limited to the embodiments described below, but may be applied to other types of touch input devices.
  • the following describes a pressure type touch input device and a capacitive touch input device in which touch cells are arranged in a matrix form, but the present invention is applicable to an optical or other type of touch input device.
  • the pressure and capacitive touch input devices referred to as embodiments may be variously changed within the technical spirit of the present invention.
  • the switching element may be replaced with “TFT”, and the same reference numerals will be used for the switching element and the TFT.
  • FIG. 1 and 2 are block diagrams schematically illustrating a touch input recognition device according to the present invention.
  • 1 illustrates a touch input device
  • FIG. 2 illustrates a display device with a built-in touch input device.
  • the touch input device 100 includes a touch panel 100a and a touch signal processor 100b for processing a touch signal.
  • the touch panel 100a includes an active area 105 for sensing a touch input.
  • the active region 105 is divided into a plurality, and each of the divided regions forms the touch cell 60.
  • the touch cells 60 are arranged in a matrix form in the active region 105.
  • the touch panel 100a is made of a light transmissive material and mounted on a display device (not shown). In this case, the active region 105 of the touch panel 100a is positioned to correspond to the active region of the display device.
  • the active region 105 has an appropriate transmittance so that the display device can be seen, and an invisible region 110 is formed around the active region 105.
  • the touch panel 100a may be configured as a separate input means that is not placed on the display device such as a touch pad of a notebook.
  • the display device 200 may include a touch input device.
  • the touch panel may be internalized in the LCD such that the touch panel 100a is installed between the color filter and the polarizing plate of the LCD or on the upper portion of the polarizing plate.
  • the touch panel 100a may be integrated with the array substrate or the color filter of the LCD.
  • the active region 105 of the touch panel 100a is positioned to correspond to the active region of the display device.
  • the touch input recognition device may be provided in various forms as shown in FIGS. 1 and 2.
  • the touch signal processor 100b includes a touch controller 80, a touch coordinate receiver 82, an input selector 84, and an effective input selector 86.
  • Configurations such as “parts” are components that perform certain roles, and refer to software or hardware components such as a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC).
  • FPGA field-programmable gate array
  • ASIC application specific integrated circuit
  • “ ⁇ ” is not meant to be limited to software or hardware.
  • “ ⁇ unit” may be configured in an addressable storage medium, or may be configured to play one or more processors.
  • “ ⁇ part” may include certain processes, functions, properties, subroutines, segments of program code, firmware, microcode, database, variables.
  • “ ⁇ part” may be included in a larger component or “ ⁇ part” or may include smaller components and “ ⁇ part”. Also, the " ⁇ part” may have its own CPU.
  • the touch controller 80 provides an operation signal to each of the touch cells 60 and detects whether a touch input is generated from each touch cell 60.
  • the operation signal and the detection signal may be an electrical signal such as a voltage or a current, an optical signal such as an infrared ray, or some other type of signal.
  • the touch controller 80 may be provided in the form of a drive integrated circuit (IC) or an ASIC, and may include additional circuit components.
  • the touch controller 80 scan-drives the touch cells 60 having a matrix form in a column direction or a row direction. Then, a predetermined signal is received from the touch cells 60 in a direction crossing the scan driving direction depending on whether a touch input is generated. In this manner, signals from each touch cell 60 can be detected independently.
  • the operation of the touch controller 80 will be described in detail with reference to some examples below.
  • the touch coordinate receiver 82, the input selector 84, and the effective input selector 86 are main components for recognizing a valid touch input according to the present invention. These components may be an embedded MCU (Micro Control Unit) embedded in the touch controller 80 or an external MCU installed outside of the touch controller 80. Or it may be included in the CPU of the terminal supporting a mobile phone or other touch interface, or may be separately installed in these terminals.
  • MCU Micro Control Unit
  • FIG. 3 is a schematic view of a touch input recognition method according to the present invention, which shows a process of searching for a GUI object 210 that is validly input when a plurality of GUI objects 210 are touch input.
  • the process starts from the step ST100 in which the touch coordinate receiving unit 82 receives the touch coordinates from the touch controller 80 (ST100).
  • the touch controller 80 sends the touch coordinates to the touch coordinate receiving unit 82 after a single scan is completed or the predetermined number of scans is filled over the entire active area 105.
  • the input selector 84 reads the received touch coordinates and extracts the GUI object 210 in which the touch input has occurred (ST110). To this end, the input selector 84 reads the coordinates of the GUI object 210 from the display screen controller 90 such as an LCD controller. For example, the input selector 84 maps coordinates and touch coordinates of the GUI object 210, and touch coordinates identical to the coordinates of the GUI object 210 or touch coordinates included in the coordinate region of the GUI object 210. Read and extract the touch input GUI object 210.
  • the valid input selector 86 determines whether a plurality of adjacent GUI objects 210 are selected by touch (ST120). If a plurality of adjacent GUI objects 210 are not selected, the GUI objects 210 extracted by the input selector 84 are effectively processed (ST130).
  • GUI object 210 when the QWERTY keyboard is selected as a touch input, the surrounding GUI objects 210 are simultaneously touched even when the user wants to select only one GUI object 210 with a finger 25. This happens. In order to prevent this, the GUI object 210 may be set very large, or sufficient space may be provided between the GUI objects 210. However, in this case, it will be difficult to arrange the full key on the screen of the small mobile terminal.
  • one GUI object includes a plurality of display pixels (ie, has a sufficient size)
  • a plurality of touch cells 60 are allocated to each GUI object 210.
  • the touch cells 60 are arranged as shown in the form of a grid in FIG. 5, approximately 50 or more touch cells 60 are allocated to each GUI object 210.
  • keys of “5”, “R”, “T”, “D”, “F”, and “G” will be simultaneously touched.
  • the person instinctively makes a touch around the GUI object 210 that he or she wishes to input. Therefore, when trying to input “r” of “sir” in FIG. 4, the largest area of the finger is allocated to the “R” key as in FIG. 5.
  • the valid input selector 86 determines that a plurality of adjacent GUI objects 210 are selected in step ST120, the valid input selector 86 has the largest number of touch coordinates ( In other words, the GUI object 210, which has detected the greatest number of touch cells 60, is recognized as a valid input (ST140). For example, the valid input selector 86 calculates the number of touch coordinates for each of the plurality of adjacent GUI objects 210. Then, the GUI object ("R" in FIG. 5) having the most touch coordinates is extracted. The valid input selector 86 processes "R" as a valid input signal and invalidates touch input to the rest of which the number of touch coordinates is small.
  • the valid input selector 86 may recognize that the same touch coordinate is input to two or more adjacent GUI objects 210. For example, suppose that the same number of touch coordinates is detected in FIG. 5 corresponding to “R” and “T” while being larger than other adjacent GUI objects 210.
  • the touch controller 80 reports a touch detection signal at about 100 frames per second. Therefore, when data of approximately 5 to 10 frames is sampled, the GUI object 210 in which the number of touch coordinates is detected can be selected. If the same number of touch coordinates is detected for “R” and “T” even when data of five frames is sampled, all touch inputs may be invalidated while processing the frames.
  • priority is given to the GUI object 210.
  • the priority may be given based on the frequency of use or location relationship of the GUI object 210. For example, if “R” is used more often than "T", and this information is stored in the memory, the valid input selector 86 refers to the memory and inputs "R" to a valid input when the above assumption occurs. Will be able to handle As another example, if priority is given to the GUI object 210 located on the left side, in the above assumption, “R” may be treated as a valid input.
  • the touch input recognition device and the recognition method of the present invention can be applied without being limited to the type of the touch input device.
  • the present invention may be applied to various types of touch input devices such as digital pressure type, capacitive type, optical type, and ultrasonic type.
  • touch input devices such as digital pressure type, capacitive type, optical type, and ultrasonic type.
  • some examples of the touch panel will be described with reference to the inventor's prior patents in order to facilitate understanding of the present invention.
  • examples of the touch panel described below are not intended to limit the technical spirit of the present invention, but are merely to help understanding.
  • the touch cell 60 is composed of a pair of conductive pads of the first conductive pad 12 and the second conductive pad 14 spaced apart from each other.
  • the signal supply line 22 is connected to the first conductive pad 12, and the signal detection line 24 is connected to the second conductive pad 14.
  • the touch controller 80 applies the position detection signal through the signal supply line 22, and receives the position detection signal from the signal detection line 24.
  • a conductor for conducting a pair of conductive pads is formed on the substrate facing the substrate on which the touch cell 60 is formed.
  • the conductor is for example an ITO layer.
  • the structural feature of the above configuration is that a pair of conductive pads are formed on the same plane to form the touch cell 60. Accordingly, it is not necessary to apply any signal to the opposing substrate side.
  • the two opposing substrates are in contact with each other. At this time, as the conductive pad pair is energized by the conductor, the position detection signal originated from the transmitting end of the touch controller 80 is obtained by the receiving end of the touch controller 80 via the energized conductive pad pair.
  • the touch controller 80 may calculate the touch coordinates by determining the acquisition timing of Sn according to the scan timing of Dn. For example, if the S3 signal is received at the on timing of D3, the touch controller 80 generates a touch signal having “D3, S3” coordinate information. The signal is transmitted to the touch coordinate receiver 82.
  • a three-terminal switching device 18 for switching the energization between the first conductive pad 12 and the second conductive pad 14 is provided in each touch cell 60. You can see that it is installed more.
  • the switching element 18 is preferably a thin film transistor (TFT).
  • the touch controller 80 applies an on / off control signal to the gate terminal of each TFT 18 through the gate signal line 26.
  • the touch controller 80 sequentially supplies the gate signal Gn to each gate signal line 26. Therefore, in each touch cell 60, the position detection signal is output only while the TFT 18 is turned on.
  • multi-touch recognition can be performed without limiting the number of touch points by preventing reverse flow of the position detection signal when a plurality of points are simultaneously touched.
  • the touch controller 80 if the S3 signal is received at the on timing of G3, the touch controller 80 generates a touch signal having the coordinate information "D3, S3". The signal is transmitted to the touch coordinate receiver 82.
  • FIG. 7 illustrates that the TFTs 18 are disposed between the second conductive pads 14 and the signal detection line 24 in each touch cell 60, but the TFTs 18 may include the first conductive pads. It may be provided between the 12 and the signal supply line 22. In addition, the TFTs 18 in each touch cell 60 may be provided at both positions.
  • FIG. 8 is a diagram conceptually illustrating an example of capacitance formation between the body and the conductive pad.
  • the conductive pad 50 and the finger 25 are spaced apart at an interval of “d”.
  • the capacitance “C” is formed between the finger 25 and the conductive pad 50 as shown in the right equivalent circuit and the equation of FIG. 8.
  • a charge having a magnitude of charge amount “Q” is accumulated by supplying a signal of voltage or current to the conductive pad 50 having the capacitance “C”
  • the body is virtually grounded with respect to the earth.
  • a charge is applied to the capacitance C formed between the conductive pad 50 and the finger 25. Is charged.
  • the gate terminal of the signal detection switching element 44 preferably TFT
  • the conductive pad 50 accumulates at the time when the charge is charged and the capacitance C.
  • the signal detection TFT 44 is turned on for an arbitrary time when the signal is discharged. The magnitude of the discharged signal gradually decreases with time, and when discharged to some extent, the signal detection TFT 44 is turned off.
  • 9 and 10 show a circuit configuration of the touch panel using the above principle.
  • 9 and 10 are views taken from the inventors prior patent registration KR 10-0935403. Portions which are not described below may be referred to in the above patents.
  • the unit touch cell 60 is composed of a conductive pad 50 isolated from the periphery and a signal detection TFT 44 having a gate terminal connected to the conductive pad 50.
  • the touch controller 80 scans and supplies a charging signal to the conductive pads 50 of each touch cell 60 through the charging signal supply line 32.
  • An auxiliary signal line 37 and a touch signal detection line 34 are connected to the input and output terminals of the signal detection TFT 44, respectively.
  • the touch controller 80 applies a charging signal through the charging signal supply line 32, applies an observation signal to the auxiliary signal line 37, and receives a touch detection signal from the touch signal detection line 34.
  • the signal detecting TFT 44 While the charging signal is applied, the signal detecting TFT 44 remains turned on under certain conditions (such as a voltage condition between Auxn and Sn applied to the input / output terminals of the signal detecting TFT 44, respectively).
  • the gate terminal potential of the signal detecting TFT 44 drops rapidly when the charging signal is turned off. The influence of parasitic capacitance is negligible here. In this manner, after the gate terminal potential of the signal detecting TFT 44 falls, no signal is received by the touch signal detection line 34 even when a predetermined signal is applied through the auxiliary signal line 37.
  • a virtual capacitor will be formed between the finger 25 and the conductive pad 50 as shown in FIG. 8. And this virtual capacitor will be charged by the charging signal. Then, when the charge signal is turned off and the conductive pad 50 is isolated, the signal detection TFT 44 is kept on for a while by the charge charged in the virtual capacitor. This phenomenon persists until the touch input is released, the virtual capacitor is forcibly discharged, or the virtual capacitor is discharged to some extent by leakage or free discharge. Therefore, the non-contact touch input of the body can be detected.
  • the touch controller 80 For example, if the S3 signal is received at the time when the charging signal D3 is turned on, the touch controller 80 generates “D3, S3” coordinate signals. The signal is transmitted to the touch coordinate receiving unit 82.
  • each touch cell 60 further includes a charging signal switching device 42 as compared with the embodiment of FIG. 9.
  • the charging signal switching element 42 is also preferably a TFT.
  • the input terminal of the charging signal TFT 42 is connected to the charging signal supply line 32 and the output terminal is connected to the conductive pad 50.
  • the touch controller 80 supplies an on / off control signal to the gate terminal of the charging signal TFT 42 through the gate signal line 36.
  • the touch controller 80 sequentially scans and drives the gate signal Gn.
  • the charging signal Dn is supplied simultaneously to the entire touch cell 60 or in synchronization with the gate signal Gn.
  • the charging signal supply line 32 is preferably arranged in parallel with the gate signal line 36.
  • the charge signal TFT 42 By adding the charge signal TFT 42 in this manner, it is possible to stably switch supply and cut off the charge signal. Therefore, when a touch input occurs, the signal from the conductive pad 50 can be reliably isolated, and the touch signal is more stable than the embodiment of FIG. 9, and the multi-touch can be easily recognized.
  • the touch controller 80 when the S3 signal is received at the time when the gate signal G3 is applied, the touch controller 80 generates a touch input signal having coordinate information of “D3, S3”. The signal is transmitted to the touch coordinate receiving unit 82.
  • the signal detection TFT 44 may be used to detect whether or not a virtual capacitor is generated between the finger 25 and the conductive pad 50.
  • the detection method is performed by observing a waveform of Sn, detecting a current flowing through an input / output terminal of the signal detecting TFT 44, or detecting a potential difference applied between the gate terminal and the output terminal.
  • the size of the virtual capacitor induced in each touch cell 60 is determined by the opposing area of the conductive pad 50 and the finger 25 of the body. And we can know the size of the virtual capacitor in each touch cell 60 by using the above methods. That is, from the signal observed through the signal detecting TFT 44, it can be known how much area the finger 25 covers the touch cell 60.
  • the effective input selector 86 calculates and compares the size of the capacitor in each touch cell 60 even when the number of touch coordinates of the touch cell 60 is detected with respect to two or more adjacent GUI objects 210. You can select valid input.
  • FIG. 11 illustrates a case in which one touch cell 60 is allocated to one GUI object 210.
  • the keys touched by the finger 25 are four keys “4”, “5”, “R”, and “T”. In this case, only one touch coordinate is received for each of the four key objects.
  • the valid input selector 86 calculates the size of the capacitor corresponding to the selected GUI object 210. Then, the size of the capacitor is compared between the GUI objects 210. Next, the touch input to the GUI object 210 having the largest capacitor is recognized as an effective input signal.
  • the valid input selector 86 selects “4” as the valid input even if all four key objects detect the same number of touch coordinates.
  • the first conductive pad 12, the second conductive pad 14, and the conductive pad 50 may be indium tin oxide (ITO), indium zinc oxide (IZO), or antimony tin oxide (ATO). It is formed by applying a transparent conductive material such as carbon nanotubes (Carbon Nano Tube). 9 and 10, the conductive pad 50 is formed to have the largest area possible in the touch cell 60. As the area of the conductive pad 50 is wider, the virtual capacitance formed between the finger 25 and the conductive pad 50 is increased, so that the touch signal can be more stably obtained.
  • ITO indium tin oxide
  • IZO indium zinc oxide
  • ATO antimony tin oxide
  • a light shielding layer for blocking light may be provided on the upper surface of the TFT 18, the charge signal TFT 42, and the signal detection TFT 44.
  • the light shielding layer may be formed of a metal used for manufacturing a source electrode or a drain electrode of a TFT, a metal used for manufacturing a gate electrode, or an impermeable insulating film.
  • the impermeable insulating film may be formed of an oxide film, a nitride film, an insulating polysilicon film, or the like. This light shielding layer prevents the TFT from malfunctioning in response to light.
  • the TFT 18, the charging signal TFT 42, and the signal detecting TFT 44 can be visually recognized by the user as they are formed of a plurality of metal layers.
  • the TFTs may be provided in the invisible region 110 of the touch panel 100a. 6 to 10 merely illustrate a circuit configuration of the touch cell 60, and TFTs constituting each touch cell 60 may be physically integrated in the invisible region 110. . As such, when the TFTs are installed in the invisible region 110, the light shielding layer may not be necessary.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

La présente invention concerne un procédé et un appareil permettant de reconnaître une entrée tactile, qui peut reconnaître un objet de GUI qui doit être entré par un utilisateur, même lorsqu'une pluralité d'objets de GUI adjacents sont touchés ensemble. Le procédé de reconnaissance d'une entrée tactile conforme à l'invention comprend : (a) une étape de réception de valeurs de coordonnées d'une cellule tactile (60) au cours de laquelle une pression est effectuée ; (b) une étape de lecture de la coordonnée tactile correspondant à la coordonnée d'un objet de GUI (210) afin d'extraire l'objet de GUI (210) sélectionné par l'entrée tactile ; (c) une étape de détermination permettant de savoir si une pluralité d'objets de GUI adjacents (210) est sélectionnée ; et (d) si une pluralité d'objets de GUI adjacents (210) est sélectionnée à l'étape (c), une étape de reconnaissance, comme signal d'entrée efficace, de l'entrée tactile pour l'objet de GUI (210) sur laquelle la plupart des coordonnées tactiles de la cellule tactile (60) sont détectées. Selon le procédé susmentionné de l'invention, l'objet de GUI devant être entré par un utilisateur peut être précisément reconnu, même lorsqu'une pluralité d'objets de GUI adjacents sont touchés ensemble par le doigt de l'utilisateur ou analogue, et une opération erronée ou une reconnaissance erronée est empêchée, même lorsque la pluralité d'objets de GUI est touchée au même moment.
PCT/KR2010/005094 2009-08-04 2010-08-03 Procédé et appareil de reconnaissance d'entrée tactile Ceased WO2011016664A2 (fr)

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WO2015064827A1 (fr) * 2013-11-01 2015-05-07 한국생산기술연구원 Étiquette tactile reconnaissable via un panneau tactile capacitif, procédé de reconnaissance d'informations s'y rapportant et procédé de fourniture d'informations l'utilisant

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WO2014148850A1 (fr) * 2013-03-22 2014-09-25 삼성전자 주식회사 Procédé et appareil d'affichage d'écran dans un dispositif ayant un écran tactile
US10261675B2 (en) 2013-03-22 2019-04-16 Samsung Electronics Co., Ltd. Method and apparatus for displaying screen in device having touch screen
WO2015064827A1 (fr) * 2013-11-01 2015-05-07 한국생산기술연구원 Étiquette tactile reconnaissable via un panneau tactile capacitif, procédé de reconnaissance d'informations s'y rapportant et procédé de fourniture d'informations l'utilisant
US10001890B2 (en) 2013-11-01 2018-06-19 Korea Institute Of Industrial Technology Touch tag recognizable through capacitive touch panel, information recognition method thereof and information providing method using same

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KR20110014114A (ko) 2011-02-10
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KR101071168B1 (ko) 2011-10-10
KR20110014115A (ko) 2011-02-10

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