WO2015085721A1 - 触控装置及其驱动方法 - Google Patents

触控装置及其驱动方法 Download PDF

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Publication number
WO2015085721A1
WO2015085721A1 PCT/CN2014/078521 CN2014078521W WO2015085721A1 WO 2015085721 A1 WO2015085721 A1 WO 2015085721A1 CN 2014078521 W CN2014078521 W CN 2014078521W WO 2015085721 A1 WO2015085721 A1 WO 2015085721A1
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WIPO (PCT)
Prior art keywords
electrode array
signal line
touch
electrode
switch
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Ceased
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PCT/CN2014/078521
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English (en)
French (fr)
Inventor
程鸿飞
张玉欣
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to US14/423,962 priority Critical patent/US9996183B2/en
Priority to EP14861136.1A priority patent/EP2921941B1/en
Publication of WO2015085721A1 publication Critical patent/WO2015085721A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • 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
    • G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • 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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
    • 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices

Definitions

  • the present invention relates to the field of touch technologies, and in particular, to a touch device and a driving method thereof. Background technique
  • the rise of capacitive touch technology has brought great convenience to people's production and life.
  • the technology first divides the touch detection area into a number of grid points that intersect horizontally and vertically, and then obtains the change rule of the capacitance value of the grid point. Touch the location information of the point.
  • the current touch device is a single-sided touch, as shown in FIGS. 1 and 1b, which is a schematic diagram of a single-sided touch structure in the technology known to the inventors.
  • the single-sided touch device includes: a touch-bearing panel 110 and a touch
  • the driving electrode 120, the insulating layer 140, and the sensing electrode 130 are sequentially formed on one side of the carrier layer 110.
  • a plurality of driving electrodes 120 and sensing electrodes 130 form an interleaved array.
  • Each row of sensing electrodes 130 is connected to the touch circuit through a sensing signal line 160.
  • Each column of driving electrodes 120 is connected through a driving signal line 150. Control circuit.
  • the driving electrode 120 and the sensing electrode 130 There is a mutual inductance between the driving electrode 120 and the sensing electrode 130, and a driving signal is applied to the driving electrode 120. After the coupling of the mutual inductance capacitor, an induction signal is obtained on the sensing electrode 130. When the touch occurs, the electric field is affected by the human body. The size of the mutual inductance is changed, and the size of the sensing signal on the sensing electrode 130 is changed. The sensing signal on the sensing electrode 130 is measured to determine whether the touch occurs, and the touch point can be determined on the touch bearing panel 110. s position.
  • the technical problem solved by the present invention is: How to implement a touch device with double-sided touch.
  • the present invention provides a touch device including: a touch bearing panel; a driving signal line and an inductive signal line; a touch circuit, wherein the touch circuit connects the driving signal line and the sensing signal line a first electrode array and a second electrode array on the touch bearing panel; a first transfer switch, one end of the first transfer switch is connected to the first electrode array, and the other end of the first transfer switch Connected to the corresponding driving signal line and the sensing signal line; and a second switching switch, the second switching switch is connected to the second electrode array at one end, and the other end of the second switching switch is connected to the corresponding driving signal line And an inductive signal line, wherein the first transfer switch and the second transfer switch are adapted to switch between respective driving signal lines and sensing signal lines to connect the first electrode array to the sensing signal lines And one of the driving signal lines, and correspondingly, the second electrode array is connected to the other of the driving signal line and the sensing signal line.
  • the first electrode array and the second electrode array are respectively located on opposite sides of the touch bearing panel.
  • the first electrode array and the second electrode array are both located on the same side of the touch-bearing carrying panel, and an insulating layer is spaced between the first electrode array and the second electrode array.
  • each row of first electrodes is respectively connected to one of the first transfer switches, and each column of second electrodes is respectively connected to one of the second transfer switches; or each column of first electrodes is respectively connected to one of the
  • the first transfer switch has a second electrode connected to each of the second transfer switches.
  • the touch bearing panel is a display panel.
  • the display panel includes: a first substrate and a second substrate opposite thereto, wherein the first electrode array is located on the first substrate, and the second electrode array is located on the second substrate.
  • first electrode array is located on a side of the first substrate facing away from the second substrate
  • second electrode array is located on a side of the second substrate facing away from the first substrate
  • the display panel includes: a first substrate and a second substrate opposite thereto, wherein the first electrode array and the second electrode array are both located on the first substrate; or The first electrode array and the second electrode array are both located on the second substrate.
  • the area corresponds to N pixel units of the display panel; or the area between the adjacent two columns of first electrodes and the adjacent two rows of second electrodes corresponds to N pixel units of the display panel, and N is a natural number.
  • N 3 to 15.
  • tl t2.
  • the touch receiving panel is a display panel
  • the time for displaying one frame of the screen is T
  • the front T1 time period is a display time period
  • the last T2 time period is a touch time period
  • T1 + T2 T
  • Tl > ⁇ 2 st, s ⁇ l.
  • the present invention also provides a driving method for driving any of the above-described touch devices, comprising the steps of: operating a first changeover switch such that the first electrode array is connected to a driving signal line, and operating the second switching switch The second electrode array is connected to the sensing signal line; and after continuing for a predetermined time, operating the first switching switch to connect the first electrode array to the sensing signal line, and correspondingly operating the second switching switch The second electrode array is connected to the driving signal line.
  • the signal conversion is performed by the changeover switch, so that the first electrode and the second electrode are switched between the sensing signal line and the driving signal line, thereby realizing double-sided touch.
  • Figure la is a schematic cross-sectional view of a touch device of the technology known to the inventors.
  • FIG. 3 is a schematic diagram of a layout of a touch electrode and a pixel unit in a touch display device according to an embodiment of the invention
  • FIG. 4 is a schematic diagram of another layout of a touch electrode and a pixel unit in a touch display device according to an embodiment of the invention.
  • FIG. 5 is a schematic diagram showing the planar structure of another touch device according to an embodiment of the present invention. detailed description
  • the touch device of the present invention includes: a touch bearing panel, a touch circuit, a driving signal line, a sensing signal line, and a first electrode array and a second electrode array on the touch carrying panel, wherein the touch circuit is connected The driving signal line and the sensing signal line.
  • the first switch is connected to the first electrode array, and the other end of the first switch is connected to the corresponding driving signal line and the sensing signal line.
  • the second transfer switch is connected to the second electrode array at one end, and the other end of the second transfer switch is connected to a corresponding drive signal line and an induction signal line, wherein the first switch
  • the transfer switch and the second transfer switch are adapted to switch between respective driving signal lines and sensing signal lines, such that the first electrode array is connected to one of the sensing signal lines and the driving signal lines, and corresponding Grounding, the second electrode array is connected to the other of the driving signal line and the sensing signal line.
  • the first electrode in the first electrode array is a sensing electrode
  • the second electrode in the second electrode array is a driving electrode
  • the outer surface of the touch device on the side of the second electrode array facing away from the second electrode array is a touch surface; when the second electrode array is connected to the sensing signal line, and the first electrode array is connected to the driving signal line, the second electrode array
  • the second electrode in the induction The first electrode of the first electrode array is a driving electrode, and the outer surface of the second electrode array facing away from the first electrode array is a touch surface, thereby realizing double-sided touch .
  • the first electrode 220 and the second electrode 230 are formed in an array on the touch-bearing carrying panel 210, and the first electrode 220 and the second electrode 230 are both diamond-shaped.
  • the switching switch and the touch control circuit can be located on the non-touch area of the touch-bearing panel 210 or other carrier, which is not limited in this embodiment.
  • the first electrode 220 and the second electrode 230 may be located on the same side or opposite sides of the touch-substrate panel 210. When the first electrode 220 and the second electrode 230 are located on the same side of the touch-bearing panel 210, the first electrode array 220 An insulating layer is spaced apart from the second electrode array 230.
  • the first electrode 220 and the second electrode 230 are respectively located on opposite sides of the touch-bearing bearing panel 210.
  • the arrangement is omitted from the first side 220 with respect to the same side.
  • the insulating layer between the second electrode 230 and the second electrode 230 saves material and reduces the thickness of the touch device.
  • the changeover switch may specifically include: a first changeover switch 270 and a second changeover switch 280.
  • each column of the first electrodes 220 is connected to a first transfer switch 270
  • each row of second electrodes 230 is connected to a second transfer switch 280.
  • the first electrode 220 may also be connected in a row to the first transfer switch 270, and the second electrode 230 may also be
  • the touch panel 7 can be a display panel, as shown in FIG. 2c, and the liquid crystal display panel will be described below.
  • the touch-bearing panel 210 includes a first substrate 211, a second substrate 212, and a liquid crystal 213 therebetween.
  • the first electrode 220 and the second electrode 230 may both be located on the first substrate 211. They are all located on the second substrate 212 or on the first substrate 211 and the second substrate 212, respectively.
  • the first electrode 220 and the second electrode 230 are disposed on the first substrate 211 and the second substrate 212, respectively.
  • the array of the first electrodes 220 may be located on a side of the first substrate 211 facing away from the second substrate 212, and the array of the second electrodes 230 may be located on a side of the second substrate 212 facing away from the first substrate 211. That is, the first electrode 220 and the second electrode 230 are respectively located on opposite outer surfaces of the display panel, and a protective layer is also formed on the surfaces of the first electrode 220 and the second electrode 230, respectively.
  • the in-line structure may be used, that is, the first electrode 220 and the second electrode 230 are respectively located in a hierarchical structure of the side of the first substrate 211 and the second substrate 212 facing the liquid crystal 213; One of the second electrodes 230 and the second electrode 230 are in an in-line structure, and the other is located on the outer surface of the display panel.
  • the area between the adjacent two columns of the first electrodes 220 and the adjacent two rows of second electrodes 230 corresponds to the N pixel units of the display panel.
  • N is a natural number.
  • the first electrodes 220 may also be connected in a row, and the second electrodes 230 may also be connected in a column form.
  • the N value is 3 to 15. The smaller the N value is, the higher the touch precision is. The more difficult the manufacturing process (the higher the density of the first electrode and the second electrode), the higher the N value is, which can ensure the touch precision and make the production. The process difficulty is relatively low.
  • the first electrode and the second electrode may be strip-shaped or arrays of other shapes.
  • the present invention also provides a driving method for driving the touch device.
  • a driving signal is applied to the first electrode array and detected in a touch period with a predetermined time t as a touch period.
  • the mutual conversion between the driving signal and the sensing signal is performed by the first electrode array and the second electrode array through the touch circuit and the changeover switch.
  • the touch-bearing panel is a display panel, as shown in FIG. 2c, since the first electrode 220 and the second electrode 230 are respectively located on the first substrate 211 and the second substrate 212, between the first electrode and the second electrode
  • the electric field affects the display effect (such as affecting the deflection of liquid crystal molecules in the liquid crystal panel).
  • T1 > T2 can make Tl/T2 ⁇ 2, and the larger the T1/T2 value, the less flickering, for example
  • the display panel displays the time of one frame as 16.7ms, selects 4ms as the touch time period, and the other 12.7ms as the display time period, or adjusts the length of the two according to the processing capability of the IC chip. limited.
  • the present invention also relates to a driving method for driving the above touch device, comprising the steps of: operating a first transfer switch 270 such that the first electrode array is connected to a driving signal line, and operating a second transfer switch 280 connecting the second electrode array to the sensing signal line; and after continuing for a predetermined time, operating the first transfer switch 270 to connect the first electrode array to the sensing signal line, and operate the corresponding The second transfer switch 280 connects the second electrode array to the drive signal line.
  • the method of sensing the touch and positioning is basically the same as the prior art, and details are not described herein again.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触控装置，包括：触控承载面板；驱动信号线和感应信号线；触控电路，连接到驱动信号线和感应信号线；位于触控承载面板上的第一、第二电极阵列；第一转换开关，一端连接到第一电极阵列，另一端连接到对应的驱动信号线和感应信号线；以及第二转换开关，一端连接到所述第二电极阵列，另一端连接到对应的驱动信号线和感应信号线，其中，第一、第二转换开关适于在各自的驱动信号线与感应信号线之间切换，使第一电极阵列连接到感应信号线和驱动信号线中的一种，且相应地，使第二电极阵列连接到驱动信号线和所述感应信号线中的另一种。本发明还公开了一种上述触控装置的驱动方法。本发明通过转换开关进行信号转换，使得第一电极和第二电极在感应信号线和驱动信号线之间进行连接切换，从而实现了双面触控。

Description

触控装置及其驱动方法 技术领域
本发明涉及触控技术领域， 特别涉及一种触控装置及其驱动方法。 背景技术
电容触摸技术的兴起， 给人们的生产和生活带来了巨大的便利， 该技术首 先将触控检测区域划分为若干横竖相交的格点， 再通过检测格点电容值的变化 规律， 得出的触摸点的位置信息。
目前的触控装置为单面触控， 如图 la和 lb所示为发明人所知的技术中的 单面触控结构示意图， 该单面触控装置包括： 触控承载面板 110以及在触控承 载面板 110的一侧依次形成的驱动电极 120、 绝缘层 140和感应电极 130。 如 图 lb所示， 若干驱动电极 120和感应电极 130形成交错的阵列， 每行感应电 极 130分别通过一条感应信号线 160连接触控电路，每列驱动电极 120分别通 过一条驱动信号线 150连接触控电路。
驱动电极 120和感应电极 130之间存在互感电容，在驱动电极 120上施加 一个驱动信号， 经过互感电容的耦合， 感应电极 130上会相应的得到一个感应 信号， 触摸发生时， 由于人体电场的影响， 互感电容的大小会发生变化， 感应 电极 130上的感应信号的大小会变化，对感应电极 130上的感应信号进行测量， 可知触控是否发生， 并能够确定触摸点在触控承载面板 110上的位置。
上述的触控装置， 只能单面触控， 无法实现双面触控。 发明内容
(一）解决的技术问题
本发明解决的技术问题是： 如何实现双面触控的触控装置。
(二）技术方案 为解决上述技术问题，本发明提供了一种触控装置，包括：触控承载面板； 驱动信号线和感应信号线； 触控电路， 所述触控电路连接所述驱动信号线和感 应信号线； 位于所述触控承载面板上的第一电极阵列和第二电极阵列； 第一转 换开关， 所述第一转换开关一端连接到所述第一电极阵列， 所述第一转换开关 的另一端连接到对应的驱动信号线和感应信号线； 以及第二转换开关， 所述第 二转换开关一端连接到所述第二电极阵列， 所述第二转换开关的另一端连接到 对应的驱动信号线和感应信号线， 其中， 所述第一转换开关和所述第二转换开 关适于在各自的驱动信号线与感应信号线之间切换，使所述第一电极阵列连接 到所述感应信号线和驱动信号线中的一种， 且相应地， 使所述第二电极阵列连 接到所述驱动信号线和所述感应信号线中的另一种。
在本发明的一个实施例中， 所述第一电极阵列和第二电极阵列分别位于所 述触控承载面板的相对的两侧。
在本发明的一个实施例中， 所述第一电极阵列和第二电极阵列均位于所述 触控承载面板同一侧， 且第一电极阵列和第二电极阵列之间间隔有绝缘层。
在本发明的一个实施例中，每一行第一电极分别连接一个所述第一转换开 关， 每一列第二电极分别连接一个所述第二转换开关； 或每一列第一电极分别 连接一个所述第一转换开关，每一行第二电极分别连接一个所述第二转换开关。
在本发明的一个实施例中， 所述触控承载面板为显示面板。
进一步地， 所述显示面板包括： 第一基板及与其对置的第二基板， 所述第 一电极阵列位于所述第一基板上， 所述第二电极阵列位于所述第二基板上。
进一步地， 所述第一电极阵列位于所述第一基板背离所述第二基板一侧， 所述第二电极阵列位于所述第二基板背离所述第一基板一侧。
在本发明的一个实施例中， 所述显示面板包括： 第一基板及与其对置的第 二基板， 所述第一电极阵列和所述第二电极阵列均位于所述第一基板上； 或所 述第一电极阵列和所述第二电极阵列均位于所述第二基板上。
在本发明的一个实施例中，相邻两行第一电极和相邻两列第二电极之间的 区域对应为所述显示面板的 N个像素单元；或相邻两列第一电极和相邻两行第 二电极之间的区域对应为所述显示面板的 N个像素单元， N为自然数。
其中， 所述 N取值为 3 〜 15。
本发明还提供了一种用于驱动上述任一项所述触控装置的驱动方法， 包括 如下步骤： 以预定时间 t为一个触控周期， 在一个触控周期内， 对所述第一电 极阵列施加驱动信号， 并检测所述第二电极阵列的感应信号， 持续预定时间 tl 后，对所述第二电极阵列施加驱动信号，并检测所述第一电极阵列的感应信号， 持续预定时间 t2, 循环每个周期， 以实现双面触控， tl + t2 = t。
在本发明的一个实施例中， tl = t2。
在本发明的一个实施例中， 所述触控承载面板为显示面板时， 且显示一帧 画面的时间为 T, 前 T1时间段为显示时间段， 后 T2时间段为触控时间段， T1 + T2 = T, Tl > Τ2, Τ2 = s t, s≥l。
本发明还提供了一种用于驱动上述任一种触控装置的驱动方法， 包括如下 步骤： 操作第一转换开关使得所述第一电极阵列连接到驱动信号线， 且操作第 二转换开关使得所述第二电极阵列连接到感应信号线； 以及持续预定时间后， 操作所述第一转换开关使得所述第一电极阵列连接到感应信号线，且相应地操 作所述第二转换开关使得所述第二电极阵列连接到驱动信号线。
(三）有益效果
本发明提供的触控装置及其驱动方法中， 通过转换开关进行信号转换， 使 得第一电极和第二电极在感应信号线和驱动信号线之间进行连接切换，从而实 现了双面触控。 附图说明
图 la是发明人所知的技术的触控装置截面结构示意图；
图 lb是发明人所知的技术的触控装置平面结构示意图； 图 2a是才艮据本发明的一个实施例的一种触控装置平面结构示意图； 图 2b是才艮据本发明的一个实施例的一种触控装置截面结构示意图； 图 2c是才艮据本发明的一个实施例的触控显示装置结构示意图；
图 3是根据本发明的一个实施例的触控显示装置中触控电极与像素单元的 布局示意图；
图 4是根据本发明的一个实施例的触控显示装置中触控电极与像素单元的 另一种布局示意图；
图 5是才艮据本发明的一个实施例的另一种触控装置平面结构示意图。 具体实施方式
下面结合附图和实施例， 对本发明的具体实施方式作进一步详细描述。 以 下实施例用于说明本发明， 但不用来限制本发明的范围。
本发明的触控装置包括： 触控承载面板、 触控电路、 驱动信号线、 感应信 号线及位于所述触控承载面板上的第一电极阵列和第二电极阵列 , 所述触控电 路连接所述驱动信号线和感应信号线。 为了实现双面触控， 还包括第一转换开 关， 所述第一转换开关一端连接到所述第一电极阵列， 所述第一转换开关的另 一端连接到对应的驱动信号线和感应信号线； 以及第二转换开关， 所述第二转 换开关一端连接到所述第二电极阵列， 所述第二转换开关的另一端连接到对应 的驱动信号线和感应信号线， 其中， 所述第一转换开关和所述第二转换开关适 于在各自的驱动信号线与感应信号线之间切换，使所述第一电极阵列连接到所 述感应信号线和驱动信号线中的一种， 且相应地， 使所述第二电极阵列连接到 所述驱动信号线和所述感应信号线中的另一种。 即， 当第一电极阵列连接感应 信号线、 第二电极阵列连接驱动信号线时， 第一电极阵列中的第一电极为感应 电极， 笫二电极阵列中的笫二电极为驱动电极， 所述触控装置上处于笫一电极 阵列背离所述第二电极阵列一侧的外表面为触控面； 当第二电极阵列连接感应 信号线， 第一电极阵列连接驱动信号线时， 第二电极阵列中的第二电极为感应 电极， 第一电极阵列中的第一电极为驱动电极， 所述触控装置上处于第二电极 阵列背离所述第一电极阵列一侧的外表面为触控面， 从而实现了双面触控。
具体结构如图 2a和 2b所示， 第一电极 220和第二电极 230以阵列的形式 形成在触控承载面板 210上， 第一电极 220和第二电极 230均为菱形。 转换开 关和触控电路可以位于触控承载面板 210上的非触控区域， 或其它承载体上， 本实施例不做限制。 第一电极 220和第二电极 230可以位于触控承载面板 210 的同一侧或相对的两侧， 第一电极 220和第二电极 230位于触控承载面板 210 的同一侧时， 第一电极阵列 220和第二电极阵列 230之间间隔有绝缘层。 为了 使触控更灵敏， 优选地， 第一电极 220和第二电极 230分别位于触控承载面板 210的相对的两侧， 此布置相对于位于同一侧的情况， 还省去了第一电极 220 和第二电极 230之间的绝缘层， 节省了材料， 降低了触控装置的厚度。
本实施例中， 转换开关可以具体包括： 第一转换开关 270和第二转换开关 280。 图 2a中， 每一列第一电极 220分别连接一个第一转换开关 270, 每一行 第二电极 230分别连接一个第二转换开关 280。 第一转换开关 270在触控电路 的控制下使得第一电极 220在感应信号线 Ryi ( i=l,2, ... ,n, Ryi表示第 i条感应 信号线， 用于将感应信号输出至触控电路）和驱动信号线 Tyi ( i=l,2, ... ,n, Tyi 表示第 i条驱动信号线， 使触控电路将驱动信号输入至驱动电极） 间进行连接 切换； 相应地， 第二转换开关 280在触控电路的控制下使得第二电极 230在驱 动信号线 Txj (j=l,2, ... ,m, Txj表示第 j条驱动信号线， 使触控电路将驱动信 号输入至驱动电极）和感应信号线 Rxj (j=l,2, ... ,m, Rxj表示第 j条感应信号 线， 用于将感应信号输出至触控电路） 间进行连接切换。 第一电极 220也可以 行的形式连接第一转换开关 270 , 第二电极 230也可以列的形式连接第二转换 开关 280。
触控 7|ι载面板 210可以是显示面板， 如图 2c所示， 下面以液晶显示面板 为了进行说明。 触控承载面板 210包括： 第一基板 211、 第二基板 212及两者 之间的液晶 213。 第一电极 220和第二电极 230可以均位于第一基板 211上， 或均位于第二基板 212上， 或分别位于第一基板 211和第二基板 212上。 优选 地，使第一电极 220和第二电极 230分别位于第一基板 211和第二基板 212上。
为了触控更加灵敏， 可以使第一电极 220的阵列位于第一基板 211背离第 二基板 212的一侧， 第二电极 230的阵列位于第二基板 212背离第一基板 211 的一侧。 即第一电极 220和第二电极 230分别位于显示面板的相对的两个外表 面， 通常在第一电极 220和第二电极 230的表面还分别形成保护层。 当然， 也 可以釆用内嵌式结构， 即第一电极 220和第二电极 230分别位于第一基板 211 和第二基板 212面向液晶 213的一侧的层级结构中； 也可以是第一电极 220和 第二电极 230其中之一釆用内嵌式结构， 另一个位于显示面板的外表面。
为了到达一定的触控精度， 如图 3和图 4所示， 相邻两列第一电极 220和 相邻两行第二电极 230之间的区域对应为所述显示面板的 N个像素单元， N 为 自然数。 第一电极 220也可以行的形式连接， 第二电极 230也可以列的形式连 接。 其中， 所述 N取值为 3 ~ 15。 N值越小， 触控精度越高， 相应地制作工艺 (第一电极和第二电极密度越大）的难度也越大， 可以取 N值为 5, 即保证触 控精度， 又能使制作工艺难度相对较低。
如图 5所示， 第一电极和第二电极可以是条状， 也可以是其它形状排成的 阵列。
本发明还提供了一种驱动上述触控装置的驱动方法， 该方法中， 以预定时 间 t为一个触控周期，在一个触控周期内，对所述第一电极阵列施加驱动信号， 并检测所述第二电极阵列的感应信号，持续预定时间 tl后，对所述第二电极阵 列施加驱动信号， 并检测所述第一电极阵列的感应信号， 持续预定时间 t2, 循 环每个周期， 以实现双面触控， tl + t2 = t。 具体通过触控电路和转换开关来实 现第一电极阵列和第二电极阵列在驱动信号和感应信号间的相互转换。
进一步地， 为了是两面都有均等的触控感应几率， 使 tl = t2。
若触控承载面板为显示面板， 如图 2c所示， 由于第一电极 220和第二电 极 230分别位于第一基板 211和第二基板 212上， 第一电极和第二电极之间的 电场会影响显示效果（如在液晶面板中， 影响液晶分子的偏转）。 为了更好地 显示， 将显示时间和触控时间划分在不重叠的时间段。 具体地， 显示一帧画面 的时间为 T, 前 T1时间段为显示时间段，后 T2时间段为触控时间段， Tl + T2 = T, Τ2 = s t, s > 1 , s优选为整数。
由于显示时间不再连续， 之间间隔有触控时间段， 为了避免人眼看到闪烁 现象， 使得 T1 > T2, 可以使 Tl/T2≥ 2, T1/T2值越大， 越不会闪烁， 例如， 显示面板显示一帧的时间为 16.7ms, 选取其中 4ms作为触控时间段， 其他的 12.7ms作为显示时间段， 或根据 IC芯片的处理能力适当的调整两者的时长， 在此不做具体限定。
根据本发明的一个实施例， 本发明还涉及一种用于驱动上述触控装置的驱 动方法， 包括如下步骤： 操作第一转换开关 270使得所述第一电极阵列连接到 驱动信号线，且操作第二转换开关 280使得所述第二电极阵列连接到感应信号 线； 以及持续预定时间后， 操作所述第一转换开关 270使得所述第一电极阵列 连接到感应信号线，且相应地操作所述第二转换开关 280使得所述第二电极阵 列连接到驱动信号线。
本发明中当确定在某一面触控时， 其感应触摸并定位的方法与现有技术基 本相同， 此处不再赘述。
以上实施方式仅用于说明本发明， 而并非对本发明的限制， 有关技术领域 的普通技术人员， 在不脱离本发明的精神和范围的情况下， 还可以做出各种变 化和变型， 因此所有等同的技术方案也属于本发明的范畴， 本发明的专利保护 范围应由权利要求限定。

Claims

权 利 要 求 书
1、 一种触控装置， 包括：
触控承载面板；
驱动信号线和感应信号线；
触控电路， 所述触控电路连接到所述驱动信号线和感应信号线；
位于所述触控承载面板上的第一电极阵列和第二电极阵列；
第一转换开关， 所述第一转换开关一端连接到所述第一电极阵列， 所述第 一转换开关的另一端连接到对应的驱动信号线和感应信号线； 以及
第二转换开关， 所述第二转换开关一端连接到所述第二电极阵列， 所述第 二转换开关的另一端连接到对应的驱动信号线和感应信号线，
其中，
所述第一转换开关和所述第二转换开关适于在各自的驱动信号线与感应 信号线之间切换，使所述第一电极阵列连接到所述感应信号线和驱动信号线中 的一种， 且相应地， 使所述第二电极阵列连接到所述驱动信号线和所述感应信 号线中的另一种。
2、 如权利要求 1 所述的触控装置， 其中， 所述第一电极阵列和第二电极 阵列分别位于所述触控承载面板的相对的两侧。
3、 如权利要求 1 所述的触控装置， 其中， 所述第一电极阵列和第二电极 阵列均位于所述触控承载面板同一侧， 且第一电极阵列和第二电极阵列之间间 隔有绝缘层。
4、 如权利要求 1所述的触控装置， 其中，
每一行第一电极分别连接一个所述第一转换开关，每一列第二电极分别连 接一个所述第二转换开关； 或每一列第一电极分别连接一个所述第一转换开关， 每一行第二电极分别连接一个所述第二转换开关。
5、 如权利要求 1~4 中任一项所述的触控装置， 其中， 所述触控承载面板 为显示面板。
6、 如权利要求 5所述的触控装置， 其中， 所述显示面板包括： 第一基板 及与其对置的第二基板， 所述第一电极阵列位于所述第一基板上， 所述第二电 极阵列位于所述第二基板上。
7、 如权利要求 6所述的触控装置， 其中， 所述第一电极阵列位于所述第 一基板背离所述第二基板一侧， 所述第二电极阵列位于所述第二基板背离所述 第一基板一侧。
8、 如权利要求 5所述的触控装置， 其中，
所述显示面板包括第一基板及与其对置的第二基板； 且
所述第一电极阵列和所述第二电极阵列均位于所述第一基板上； 或所述第 一电极阵列和所述第二电极阵列均位于所述第二基板上。
9、 如权利要求 5所述的触控装置， 其中， 相邻两行第一电极和相邻两列 第二电极之间的区域对应为所述显示面板的 N个像素单元；或相邻两列第一电 极和相邻两行第二电极之间的区域对应为所述显示面板的 N个像素单元， N 为 自然数。
10、 如权利要求 9所述的触控装置， 其中， 所述 N取值为 3 ~ 15。
11、 一种用于驱动如权利要求 1~10 中任一项所述触控装置的驱动方法， 包括如下步骤：
以预定时间 t为一个触控周期， 在一个触控周期内， 对所述第一电极阵列 施加驱动信号， 并检测所述第二电极阵列的感应信号， 持续预定时间 tl后， 对 所述第二电极阵列施加驱动信号， 并检测所述第一电极阵列的感应信号， 持续 预定时间 t2, 循环每个周期， 以实现双面触控， tl + t2 = t。
12、 如权利要求 11所述的驱动方法， 其中， tl = t2。
13、 如权利要求 11 所述的驱动方法， 其中， 所述触控承载面板为显示面 板时， 且显示一帧画面的时间为 T, 前 T1时间段为显示时间段， 后 T2时间段 为触控时间段， T1 + T2 = T, Tl > Τ2, Τ2 = s t, s≥l。
14、 一种用于驱动如权利要求 1〜10中任一项所述触控装置的驱动方法， 包括如下步骤：
操作第一转换开关使得所述第一电极阵列连接到驱动信号线， 且操作第二 转换开关使得所述第二电极阵列连接到感应信号线； 以及
持续预定时间后，操作所述第一转换开关使得所述第一电极阵列连接到感 应信号线，且相应地操作所述第二转换开关使得所述第二电极阵列连接到驱动 信号线。
PCT/CN2014/078521 2013-12-13 2014-05-27 触控装置及其驱动方法 Ceased WO2015085721A1 (zh)

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