WO2017206545A1 - 电容值校准装置、方法和触摸显示设备 - Google Patents

电容值校准装置、方法和触摸显示设备 Download PDF

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Publication number
WO2017206545A1
WO2017206545A1 PCT/CN2017/073557 CN2017073557W WO2017206545A1 WO 2017206545 A1 WO2017206545 A1 WO 2017206545A1 CN 2017073557 W CN2017073557 W CN 2017073557W WO 2017206545 A1 WO2017206545 A1 WO 2017206545A1
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Prior art keywords
capacitance value
touch
coupling capacitor
electrode layer
touch display
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PCT/CN2017/073557
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English (en)
French (fr)
Inventor
张言萍
张大宇
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei Xinsheng Optoelectronics Technology Co Ltd
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Priority to US15/553,400 priority Critical patent/US20180173366A1/en
Publication of WO2017206545A1 publication Critical patent/WO2017206545A1/zh
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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
    • G06F3/044—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
    • G06F3/0416—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2605—Measuring capacitance
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—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
    • G06F3/048—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/0035—User-machine interface; Control console
    • H04N1/00405—Output means
    • H04N1/00408—Display of information to the user, e.g. menus
    • H04N1/00411—Display of information to the user, e.g. menus the display also being used for user input, e.g. touch screen

Definitions

  • the present disclosure relates to the field of touch display technologies, and in particular, to a capacitance value calibration apparatus, method, and touch display apparatus.
  • the projected capacitive touch display panel is provided with an X-axis electrode layer and a Y-axis electrode layer stacked on each other and insulated from each other.
  • Fig. 1 schematically shows the arrangement of an X-axis electrode layer and a Y-axis electrode layer in a projected capacitive touch display panel.
  • a plurality of X-axis touch electrodes 10 are arranged in an array on the X-axis electrode layer, and the X-axis touch electrodes of the same are connected in series to form a touch electrode row.
  • the plurality of Y-axis touch electrodes 20 are arranged in an array on the Y-axis electrode layer, and the Y-axis touch electrodes in the same column are connected in series to form a touch electrode column.
  • a coupling capacitor C M is formed between the touch electrode row and the touch electrode column (eg, at the intersection thereof), and the capacitance value of the capacitor C M is referred to as a base capacitance value.
  • the capacitance value of the coupling capacitor C M will change.
  • the touch position of the finger or other conductive object on the touch display panel can be determined by measuring the change in the capacitance value of each of the coupling capacitors CM.
  • the capacitance value of the coupling capacitor is measured only when the touch display panel is powered up and the measurement result is set as the base capacitance value of the coupling capacitor.
  • the base capacitance value is then not updated.
  • the base capacitance value may change over time or depending on the screen displayed on the touch display panel. Changes in the base capacitance value may cause misidentification of touch operations, such as false positives.
  • Embodiments of the present disclosure provide a capacitance value calibration apparatus, method, and touch display apparatus that can alleviate, mitigate, or eliminate at least one of the above problems.
  • an apparatus for calibrating a base capacitance value of a touch display panel is provided.
  • the touch display panel is provided with a first electrode layer and a second electrode layer stacked on each other and insulated from each other.
  • the first electrode layer includes at least one row of touch electrodes.
  • the second electrode layer includes at least one column of touch electrodes.
  • the at least one row of touch electrodes and at least one The column touch electrodes form at least one coupling capacitor.
  • the apparatus includes: a detecting unit configured to measure a capacitance value of the coupling capacitor in each of a plurality of non-touch periods; and a calibration unit configured to be based on the measured capacitance at each measurement The value calibrates the base capacitance value of the coupling capacitor.
  • the plurality of non-touch time periods are periodic.
  • each of the plurality of non-touch time periods is inserted between a respective display time period allocated for the touch display panel and a corresponding touch time period.
  • the plurality of non-touch time periods are aperiodic.
  • the detecting unit includes: a charging and discharging module configured to charge the touch electrode to a voltage across the coupling capacitor to a predetermined voltage, and then discharge the coupling capacitor to detect the coupling The amount of charge stored by the capacitor; and a capacitance value calculation module configured to calculate a capacitance value of the coupling capacitor based on the predetermined voltage and the amount of charge.
  • the apparatus further includes a comparison unit configured to compare the measured capacitance value to the original capacitance value for each measurement.
  • the calibration unit is further configured to set the base capacitance value to the measured capacitance value in response to the comparison unit indicating that an absolute value of a difference between the measured capacitance value and the original capacitance value is greater than a predetermined value .
  • a method for calibrating a base capacitance value of a touch display panel is provided.
  • the touch display panel is provided with a first electrode layer and a second electrode layer stacked on each other and insulated from each other.
  • the first electrode layer includes at least one row of touch electrodes.
  • the second electrode layer includes at least one column of touch electrodes.
  • the at least one row of touch electrodes and the at least one column of touch electrodes form at least one coupling capacitor.
  • the method includes measuring a capacitance value of the coupling capacitor in each of a plurality of non-touch periods; and calibrating a base capacitance value of the coupling capacitor based on the measured capacitance value at each measurement.
  • the plurality of non-touch time periods are periodic.
  • each of the plurality of non-touch time periods is inserted between a respective display time period allocated for the touch display panel and a corresponding touch time period.
  • the plurality of non-touch time periods are aperiodic.
  • the measuring comprises: charging the touch electrode to a voltage across the coupling capacitor to a predetermined voltage; discharging the coupling capacitor to detect an amount of charge stored by the coupling capacitor; A capacitance value of the coupling capacitor is calculated based on the predetermined voltage and the amount of charge.
  • the step of calibrating comprises: comparing the measured capacitance value to an original capacitance value; and responsive to the absolute value of the difference between the measured capacitance value and the original capacitance value being greater than a predetermined value The base capacitance value is set to the measured capacitance value.
  • a touch display device comprising: a touch display panel provided with a first electrode layer and a second electrode layer stacked on each other and insulated from each other, the first electrode layer including at least a row of touch electrodes, the second electrode layer comprising at least one column of touch electrodes, the at least one row of touch electrodes and the at least one column of touch electrodes forming at least one coupling capacitor; the detecting unit configured to measure in each of the plurality of non-touch periods a capacitance value of the coupling capacitor; and a calibration unit configured to calibrate a base capacitance value of the coupling capacitor based on the measured capacitance value at each measurement.
  • FIG. 1 schematically shows an arrangement of an X-axis electrode layer and a Y-axis electrode layer in a projected capacitive touch display panel
  • FIG. 2 is a block diagram of a capacitance value calibration device in accordance with an embodiment of the present disclosure
  • FIG. 3 is a block diagram of one implementation of a capacitance value calibration device in accordance with an embodiment of the present disclosure
  • FIG. 4 is a block diagram of another implementation of a capacitance value calibration device in accordance with an embodiment of the present disclosure.
  • FIG. 5 is a flowchart of a capacitance value calibration method according to an embodiment of the present disclosure.
  • FIG. 6 is a flow chart showing one implementation of measurement of capacitance values in the method of FIG.
  • the capacitance value calibration device 100 can be a component of a touch display panel or a stand-alone device operatively coupled to the touch display panel.
  • the touch display panel is arranged to be stacked on a first electrode layer and a second electrode layer that are above each other and insulated from each other.
  • the first electrode layer includes at least one row of touch electrodes.
  • the second electrode layer includes at least one column of touch electrodes.
  • the at least one row of touch electrodes and the at least one column of touch electrodes form at least one coupling capacitor.
  • An example arrangement of touch electrodes in a touch display panel is shown in FIG. 1 and will not be described in detail herein.
  • the capacitance value calibration apparatus 100 includes a detection unit 110 and a calibration unit 120.
  • the detecting unit 110 is configured to measure a capacitance value of the coupling capacitor in each of a plurality of non-touch periods.
  • the calibration unit 120 is configured to calibrate the base capacitance value of the coupling capacitor based on the measured capacitance value for each measurement.
  • the base capacitance value is calibrated when the touch display panel is in use, so that the erroneous recognition of the touch operation due to the change in the base capacitance value is reduced, thereby improving the accuracy of the touch operation.
  • a non-touch period as described herein refers to a period of time that is not assigned to a touch display panel for detecting a touch operation. In other words, the non-touch period does not overlap with the touch period.
  • each non-touch period is inserted between a display time period allocated for the touch display panel and a touch time period.
  • the non-touch period can be inserted after the display period and before the touch period.
  • the base capacitance value is updated before each touch period, so that the accuracy of the recognition of the touch operation is improved.
  • the non-touch time period may overlap with the display time period.
  • the detection and calibration of the base capacitance values can be performed at regular intervals without being performed before each touch time period.
  • the plurality of non-touch periods may also be aperiodic.
  • FIG. 3 is a block diagram of one implementation 100A of a capacitance value calibration device in accordance with an embodiment of the present disclosure.
  • the capacitance value detecting unit 110 includes a charging and discharging module 111 and a capacitance value calculating module 112.
  • the charge and discharge module 111 is configured to charge the touch electrode to a voltage across the coupling capacitor to a predetermined voltage, and then detect an amount of charge stored by the coupling capacitor by discharging the coupling capacitor.
  • the capacitance value calculation module 112 is configured to calculate a capacitance value of the coupling capacitor based on the predetermined voltage and the amount of charge.
  • the generated current, t is the discharge time
  • U is the voltage across the coupling capacitor
  • C is the capacitance value of the coupling capacitor.
  • the capacitance value detecting unit The implementation of 110 is not limited to this.
  • FIG. 4 is a block diagram of another implementation 100B of a capacitance value calibration device in accordance with an embodiment of the present disclosure.
  • the capacitance value calibration apparatus 100B further includes a comparison unit 130 as compared with the capacitance value calibration apparatus 100 shown in FIG.
  • Comparison unit 130 is configured to compare the measured capacitance value to the original capacitance value for each measurement.
  • the calibration unit 120 is further configured to set the base capacitance value to the measured value in response to the comparison of the comparison unit 130 indicating that the absolute value of the difference between the measured capacitance value and the original capacitance value is greater than a predetermined value Capacitance value.
  • the so-called original capacitance value may refer to the capacitance value of the coupling capacitor measured by the detection unit 110 at the beginning (in the first non-touch period).
  • the base capacitance value is set to the measured capacitance value only when the absolute value of the difference between the measured capacitance value and the original capacitance value is greater than the threshold. This saves the processing resources of the system.
  • FIG. 5 is a flow diagram of a capacitance value calibration method 200 in accordance with an embodiment of the present disclosure.
  • the method 200 can be used to calibrate a base capacitance value of a touch display panel.
  • the touch display panel is provided with a first electrode layer and a second electrode layer stacked on each other and insulated from each other.
  • the first electrode layer includes at least one row of touch electrodes.
  • the second electrode layer includes at least one column of touch electrodes.
  • the at least one row of touch electrodes and the at least one column of touch electrodes form at least one coupling capacitor.
  • An example arrangement of touch electrodes in a touch display panel is shown in FIG. 1 and will not be described in detail herein.
  • the method 200 includes the following steps.
  • a capacitance value of the coupling capacitor is measured in each of a plurality of non-touch periods.
  • the base capacitance value of the coupling capacitor is calibrated based on the measured capacitance value at each measurement.
  • FIG. 6 is a flow chart showing one implementation of measurement of capacitance values in the method 200 of FIG.
  • the measurement 210 of the capacitance value of the coupling capacitor may include the following steps.
  • the touch electrode is charged to a voltage across the coupling capacitor to a predetermined voltage.
  • the coupling capacitor is discharged to detect the amount of charge stored by the coupling capacitor.
  • a capacitance value of the coupling capacitor is calculated based on the predetermined voltage and the amount of charge.
  • the calibration 220 of the base capacitance value can include: comparing the measured capacitance value to the original capacitance value; and responsive to the absolute value of the difference between the measured capacitance value and the original capacitance value being greater than The base capacitance value is set to the measured capacitance value by a predetermined value.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • FPGAs field programmable gate arrays
  • the hardware components or any combination of these are designed to perform any of the functions described herein to implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein.
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be a conventional processor, controller, microcontroller, or state machine.
  • the processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

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Abstract

一种电容值校准装置、校准方法及触摸显示设备，所述电容值校准装置包括：检测单元（110），被配置成在多个非触摸时间段中的每一个中测量耦合电容器的电容值；以及校准单元（120），被配置成在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。

Description

电容值校准装置、方法和触摸显示设备 技术领域
本公开涉及触摸显示技术领域，尤其涉及一种电容值校准装置、方法和触摸显示设备。
背景技术
投射电容触摸显示面板设置有堆叠于彼此之上并且彼此绝缘的X轴电极层和Y轴电极层。图1示意性地示出了投射电容触摸显示面板中X轴电极层和Y轴电极层的布置。多个X轴触摸电极10呈阵列排布于X轴电极层，同行的X轴触摸电极串接以形成触摸电极行。多个Y轴触摸电极20呈阵列排布于Y轴电极层，同列的Y轴触摸电极串接以形成触摸电极列。
当没有导电物体接触所述触摸显示面板时，触摸电极行和触摸电极列之间(例如，在其交叉处)形成耦合电容器CM，该电容器CM的电容值被称为为基础电容值。当手指或其他导电物体触摸所述触摸显示面板时，该耦合电容器CM的电容值将发生变化。可以通过测量各个耦合电容器CM的电容值的变化来确定手指或其他导电物体在触摸显示面板上的触摸位置。
在现有技术中，仅在触摸显示面板上电时测量耦合电容器的电容值并将测量结果设定为该耦合电容器的基础电容值。之后基础电容值不被更新。然而，基础电容值可能随着时间的推移或取决于触摸显示面板上显示的画面而发生变化。基础电容值的变化可能引起触摸操作的错误识别，例如误报(false positives)。
发明内容
本公开的实施例提供一种电容值校准装置、方法和触摸显示设备，其可以缓解、减轻或消除上述问题中的至少一个。
根据本公开的一个方面，提供了一种用于校准触摸显示面板的基础电容值的装置。所述触摸显示面板设置有堆叠于彼此之上且彼此绝缘的第一电极层和第二电极层。第一电极层包括至少一行触摸电极。第二电极层包括至少一列触摸电极。所述至少一行触摸电极和至少一 列触摸电极形成至少一个耦合电容器。所述装置包括：检测单元，被配置成在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值；以及校准单元，被配置成在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
在一些实施例中，所述多个非触摸时间段是周期性的。
在一些实施例中，所述多个非触摸时间段中的每个被插入在分配用于所述触摸显示面板的相应显示时间段与相应触摸时间段之间。
在一些实施例中，所述多个非触摸时间段是非周期性的。
在一些实施例中，所述检测单元包括：充放电模块，被配置成将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压，并且然后使所述耦合电容器放电而检测所述耦合电容器所存储的电荷量；以及电容值计算模块，被配置成基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
在一些实施例中，所述装置还包括比较单元，其被配置成在每次测量时比较所测得的电容值与原始电容值。所述校准单元还被配置成响应于所述比较单元指示所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。
根据本公开的另一方面，提供了一种用于校准触摸显示面板的基础电容值的方法。所述触摸显示面板设置有堆叠于彼此之上且彼此绝缘的第一电极层和第二电极层。第一电极层包括至少一行触摸电极。第二电极层包括至少一列触摸电极。所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器。所述方法包括：在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值；以及在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
在一些实施例中，所述多个非触摸时间段是周期性的。
在一些实施例中，所述多个非触摸时间段中的每个被插入在分配用于所述触摸显示面板的相应显示时间段与相应触摸时间段之间。
在一些实施例中，所述多个非触摸时间段是非周期性的。
在一些实施例中，所述测量的步骤包括：将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压；使所述耦合电容器放电而检测所述耦合电容器所存储的电荷量；以及基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
在一些实施例中，所述校准的步骤包括：比较所测得的电容值与原始电容值；以及响应于所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。
根据本公开的又另一方面，提供了一种触摸显示设备，包括：触摸显示面板，设置有堆叠于彼此之上并且彼此绝缘的第一电极层和第二电极层，第一电极层包括至少一行触摸电极，第二电极层包括至少一列触摸电极，所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器；检测单元，被配置成在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值；以及校准单元，被配置成在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
根据在下文中所描述的实施例，本发明的这些和其它方面将是清楚明白的，并且将参考在下文中所描述的实施例而被阐明。
附图说明
图1示意性地示出了投射电容触摸显示面板中X轴电极层和Y轴电极层的布置；
图2是根据本公开实施例的电容值校准装置的框图；
图3是根据本公开实施例的电容值校准装置的一个实现方式的框图；
图4是根据本公开实施例的电容值校准装置的另一实现方式的框图；
图5是根据本公开实施例的电容值校准方法的流程图；并且
图6是示出图5的方法中电容值的测量的一个实现方式的流程图。
具体实施方式
下面将结合附图对本公开的实施例进行详细描述。显然，所描述的实施例仅仅是说明性的，而非限制性的。本领域普通技术人员在没有做出创造性劳动前提下从本公开的实施例导出的所有其他实施例，都落入本公开的范围。
图2是根据本公开实施例的电容值校准装置100的框图。该电容值校准装置100可以是触摸显示面板的组件或者与触摸显示面板可操作地耦合的独立(stand-alone)装置。所述触摸显示面板设置有堆叠于 彼此之上且彼此绝缘的第一电极层和第二电极层。第一电极层包括至少一行触摸电极。第二电极层包括至少一列触摸电极。所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器。触摸显示面板中各触摸电极的示例布置如图1所示，并且在此不作详细描述。
参照图2，电容值校准装置100包括检测单元110和校准单元120。检测单元110被配置成在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值。校准单元120被配置成在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
这样，基础电容值当触摸显示面板在使用中时被校准，使得由于基础电容值发生变化而导致的触摸操作的错误识别被减小，从而提高触摸操作的准确性。
如本文中描述的非触摸时间段是指并非分配给触摸显示面板用于检测触摸操作的时间段。换言之，非触摸时间段与触摸时间段不重叠。
多个非触摸时间段可以是周期性的。在一些实施例中，每个非触摸时间段被插入在分配用于触摸显示面板的显示时间段与触摸时间段之间。例如，非触摸时间段可以插入在显示时间段之后而在触摸时间段之前。这样，基础电容值在每一个触摸时间段之前被更新，使得触摸操作的识别的准确度得以提高。其他实施例是可能的。例如，非触摸时间段可以与显示时间段重叠。又例如，基础电容值的检测和校准可以以固定的间隔执行，而不需要在每个触摸时间段之前都执行。可替换地，多个非触摸时间段还可以是非周期性的。
图3是根据本公开实施例的电容值校准装置的一个实现方式100A的框图。
参照图3，电容值检测单元110包括充放电模块111和电容值计算模块112。充放电模块111被配置成将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压，并且然后通过使所述耦合电容器放电而检测所述所述耦合电容器所存储的电荷量。电容值计算模块112被配置成基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
在该实现方式中，电荷量的检测可以基于公式Q＝I×t，并且电容值的检测可以基于公式C＝Q/U，其中Q为耦合电容器所存储的电荷量，I为通过耦合电容器放电所生成的电流，t为放电时间，U为跨耦合电容器的电压，并且C为耦合电容器的电容值。但是，电容值检测单元 110的实现不限于此。
图4是根据本公开实施例的电容值校准装置的另一实现方式100B的框图。
参照图4，与图2中所示的电容值校准装置100相比，电容值校准装置100B还包括比较单元130。比较单元130被配置成在每次测量时比较所测得的电容值与原始电容值。校准单元120还被配置成响应于所述比较单元130的比较指示所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。所谓原始电容值可以是指由检测单元110最开始(在第一个非触摸时间段中)测得的该耦合电容器的电容值。
在该实现方式中，只有当所测得的电容值与原始电容值之间的差值的绝对值大于阈值时才将基础电容值设置为测得的电容值。这可以节省系统的处理资源。
图5是根据本公开实施例的电容值校准方法200的流程图。该方法200可以用于校准触摸显示面板的基础电容值。所述触摸显示面板设置有堆叠于彼此之上且彼此绝缘的第一电极层和第二电极层。第一电极层包括至少一行触摸电极。第二电极层包括至少一列触摸电极。所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器。触摸显示面板中各触摸电极的示例布置如图1所示，并且在此不作详细描述。
参照图5，该方法200包括以下步骤。
在步骤210，在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值。
在步骤220，在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
图6是示出图5的方法200中电容值的测量的一个实现方式的流程图。
具体地，耦合电容器的电容值的测量210可以包括以下步骤。
在步骤211，将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压。
在步骤212，使所述耦合电容器放电而检测所述耦合电容器所存储的电荷量。
在步骤213，基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
另外，在一些实施例中，基础电容值的校准220可以包括：比较所测得的电容值与原始电容值；以及响应于所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。
以上方法实施例具有与关于图2-4描述的装置实施例相同的优点，并且在此不做详细描述。
将理解的是，可以利用通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件或被设计成执行本文中描述的功能的其任何组合来实现或执行联系本文中公开的实施例而描述的各种说明性逻辑块、模块和电路。通用处理器可以是微处理器，但是在替换方案中，处理器可以是常规处理器、控制器、微控制器或状态机。处理器也可以被实现为计算设备的组合，例如DSP和微处理器的组合、多个微处理器、结合DSP核的一个或多个微处理器或任何其他这样的配置。
以上所述是本公开的特定实施方式。对于本技术领域的普通技术人员来说，可以在不脱离本公开的精神和本质的情况下做出各种修改和变型，这些修改和变型也应视为落入本公开的保护范围。

Claims (18)

  1. 一种用于校准触摸显示面板的基础电容值的装置，所述触摸显示面板设置有堆叠于彼此之上且彼此绝缘的第一电极层和第二电极层，第一电极层包括至少一行触摸电极，第二电极层包括至少一列触摸电极，所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器，所述装置包括：
    检测单元，被配置成在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值；以及
    校准单元，被配置成在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
  2. 如权利要求1所述的装置，其中所述多个非触摸时间段是周期性的。
  3. 如权利要求2所述的装置，其中所述多个非触摸时间段中的每个被插入在分配用于所述触摸显示面板的相应显示时间段与相应触摸时间段之间。
  4. 如权利要求1所述的装置，其中所述多个非触摸时间段是非周期性的。
  5. 如权利要求1所述的装置，其中所述检测单元包括：
    充放电模块，被配置成将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压，并且然后使所述耦合电容器放电而检测所述耦合电容器所存储的电荷量；以及
    电容值计算模块，被配置成基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
  6. 如权利要求1至5中任一项所述的装置，还包括比较单元，其被配置成在每次测量时比较所测得的电容值与原始电容值，其中所述校准单元还被配置成响应于所述比较单元指示所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。
  7. 一种用于校准触摸显示面板的基础电容值的方法，所述触摸显示面板设置有堆叠于彼此之上且彼此绝缘的第一电极层和第二电极层，第一电极层包括至少一行触摸电极，第二电极层包括至少一列触摸电 极，所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器，所述方法包括：
    在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值；以及
    在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
  8. 如权利要求7所述的方法，其中所述多个非触摸时间段是周期性的。
  9. 如权利要求8所述的方法，其中所述多个非触摸时间段中的每个被插入在分配用于所述触摸显示面板的相应显示时间段与相应触摸时间段之间。
  10. 如权利要求7所述的方法，其中所述多个非触摸时间段是非周期性的。
  11. 如权利要求7所述的方法，其中所述测量的步骤包括：
    将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压；
    使所述耦合电容器放电而检测所述耦合电容器所存储的电荷量；以及
    基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
  12. 如权利要求7至11中任一项所述的方法，其中所述校准的步骤包括：
    比较所测得的电容值与原始电容值；以及
    响应于所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。
  13. 一种触摸显示设备，包括：
    触摸显示面板，设置有堆叠于彼此之上并且彼此绝缘的第一电极层和第二电极层，第一电极层包括至少一行触摸电极，第二电极层包括至少一列触摸电极，所述至少一行触摸电极和至少一列触摸电极形成至少一个耦合电容器；
    检测单元，被配置成在多个非触摸时间段中的每一个中测量所述耦合电容器的电容值；以及
    校准单元，被配置成在每次测量时基于所测得的电容值校准所述耦合电容器的基础电容值。
  14. 如权利要求13所述的触摸显示设备，其中所述多个非触摸时间段是周期性的。
  15. 如权利要求14所述的触摸显示设备，其中所述多个非触摸时间段中的每个被插入在分配用于所述触摸显示面板的相应显示时间段与相应触摸时间段之间。
  16. 如权利要求13所述的触摸显示设备，其中所述多个非触摸时间段是非周期性的。
  17. 如权利要求13所述的触摸显示设备，其中所述检测单元包括：
    充放电模块，被配置成将所述触摸电极充电至跨所述耦合电容器的电压达到预定电压，并且然后使所述耦合电容器放电而检测所述耦合电容器所存储的电荷量；以及
    电容值计算模块，被配置成基于所述预定电压和所述电荷量计算所述耦合电容器的电容值。
  18. 如权利要求13至17中任一项所述的触摸显示设备，还包括比较单元，其被配置成在每次测量时比较所测得的电容值与原始电容值，其中所述校准单元还被配置成响应于所述比较单元指示所测得电容值与原始电容值之间的差值的绝对值大于预定值而将所述基础电容值设置为所测得的电容值。
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CN103235672A (zh) * 2013-04-11 2013-08-07 深圳市天微电子有限公司 电容触摸屏自动校准方法与系统
CN104252399A (zh) * 2013-06-27 2014-12-31 中兴通讯股份有限公司 触摸屏校准处理方法、装置、触摸屏及终端
CN106095162A (zh) * 2016-05-30 2016-11-09 京东方科技集团股份有限公司 电容值自校准装置、方法和触控显示装置

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