WO2014134863A1 - 触摸检测方法以及触摸检测装置 - Google Patents

触摸检测方法以及触摸检测装置 Download PDF

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Publication number
WO2014134863A1
WO2014134863A1 PCT/CN2013/075076 CN2013075076W WO2014134863A1 WO 2014134863 A1 WO2014134863 A1 WO 2014134863A1 CN 2013075076 W CN2013075076 W CN 2013075076W WO 2014134863 A1 WO2014134863 A1 WO 2014134863A1
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Prior art keywords
detection
row
touch
pixel
row group
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PCT/CN2013/075076
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English (en)
French (fr)
Inventor
徐帅
于尧
张郑欣
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北京京东方光电科技有限公司
京东方科技集团股份有限公司
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Priority to US14/345,788 priority Critical patent/US9274665B2/en
Publication of WO2014134863A1 publication Critical patent/WO2014134863A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • 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

Definitions

  • Embodiments of the present invention relate to a touch detection method and a touch detection device. Background technique
  • the touch screen detection methods include: resistive touch detection method, capacitive touch detection method, infrared touch detection method, surface acoustic wave touch detection method, electromagnetic touch detection method, and the like.
  • Touch screens for mobile devices such as mobile phones and tablets typically use resistive and capacitive technologies.
  • resistive technology the touch panel is coated with two layers of Indium Tin Oxides (ITO). When the touch panel using resistive technology is touched, the two layers are in contact such that a switch corresponding to the touched position is closed and the corresponding information is sent to the processor for further processing.
  • ITO Indium Tin Oxides
  • the touch panel is coated with a material that is capable of storing electrical charge. When a touch panel using capacitive technology is touched, a small amount of charge is drawn to the contact point, and circuitry in the touch panel measures the charge attracted to the contact point and sends the corresponding information to the processor for processing.
  • the touch screen technology adopts a progressive scan method to detect a touch, and stores a change of the touch sensor (ie, a touch panel) into the processor, and the processor converts the change of the touch sensor into a corresponding coordinate on the display screen, and the system is based on The user operation is performed at the position corresponding to the coordinates.
  • a change of the touch sensor ie, a touch panel
  • the processor converts the change of the touch sensor into a corresponding coordinate on the display screen, and the system is based on The user operation is performed at the position corresponding to the coordinates.
  • Figure 1 is a block diagram of a capacitive touch screen system.
  • 2 is a schematic view of a mutual capacitance circuit including a sensing line 111, a driving line 112, and a capacitive coupling node 113 (ie, detecting unit Co), wherein the sensing line 111 and the driving line 112 are spatially separated.
  • a drive line 112 is coupled between the voltage source 120 and the capacitive coupling node 113 for transmitting a drive signal to the capacitive coupling node 113.
  • the sensing line 111 is connected between the capacitive coupling node 113 and the capacitance detecting circuit 130, and transmits a detection signal of the capacitive coupling node 113 to the capacitance detecting circuit 130.
  • 114 and 115 are parasitic capacitances generated between the coatings of the touch panel.
  • the touch detection process will be described below by taking the capacitive coupling node 113 as an example.
  • the capacitive coupling node 113 When the capacitive coupling node 113 is not touched, the charge on the capacitive coupling node 113 remains constant. When the capacitive coupling node 113 is touched, the unit C is detected. The carried charge changes, at this time, A detection signal for changing the charge is transmitted to the capacitance detecting circuit 130 through the sensing line 111. The capacitance detecting circuit records the position information of the capacitive coupling node 113 where the charge change occurs, and transmits the recording result to the processor to cause the processor to perform the corresponding operation.
  • FIG. 3 is a schematic diagram of a conventional touch screen detection method.
  • a touch scan is performed on each pixel in each row in turn, and the processor detects and records the scan result.
  • MXN that is, in the touch screen, the total number of rows of pixels is N, the total number of columns is M, where M and N are positive integers
  • MXN inspection is required.
  • Figure 4 is a diagram showing the driving signals input by the voltage source 120 through the respective driving lines to the capacitance coupling nodes in the respective rows when the method corresponding to Figure 3 is employed.
  • the drive signal is input to the first row, so that the detection circuit sequentially detects each pixel point (i.e., each capacitive coupling node) in the first row.
  • the second period arrives, a drive signal is input to each of the capacitive coupling nodes in the second row, and the detection circuit sequentially detects each of the capacitive coupling nodes in the second row.
  • Nth cycle arrives, each capacitive coupling node in the Nth row is detected, where N is the number of rows of the touch screen.
  • the embodiments of the present invention provide a touch detection method and a touch detection device that can reduce the number of detections, thereby solving the problem that the device response is too slow, paused, or unresponsive due to excessive number of touch detections in the prior art.
  • the embodiment of the invention provides a touch detection method, including:
  • the embodiment of the invention further provides a touch detection device, including:
  • a dividing module performing row group division on multiple detection lines in the touch screen
  • the detecting module performs main touch detection on each pixel in each detection row of each row group, wherein the touch detection for the pixel points in the same pixel column in the same row group is synchronous; and when in any row When a pixel column having touch feedback is detected in the group, sub-touch detection is performed on the pixel points in the selected detection row in the pixel column to determine the touch pixel point.
  • the touch detection method and the touch detection device reduce the number of detections, effectively reduce the calculation rate requirement for the touch screen processor, and shorten the touch detection.
  • the total time increases the response rate and solves the problem of slow, paused or unresponsive devices caused by excessive touch detection.
  • Figure 1 is a block diagram of a capacitive touch screen system
  • FIG. 2 is a schematic view of a cylinder of a mutual capacitance circuit
  • FIG. 3 is a schematic diagram of a conventional touch screen detection method; a schematic diagram of a driving signal input to a node;
  • FIG. 5 is a schematic diagram of a touch detection method according to an embodiment of the invention.
  • each row group includes two detection lines
  • 6B is a schematic diagram of a result of performing main detection in an embodiment of the present invention.
  • 6C is a schematic diagram of performing secondary detection in an embodiment of the present invention.
  • each row group includes two detection lines
  • each row group includes a different number of detecting lines according to another embodiment of the present invention
  • FIG. 9 is a timing diagram of driving signals of a touch detecting method in which each row group includes a different number of detecting lines, and according to another embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a touch detecting device according to another embodiment of the present invention. detailed description
  • row detection is performed on a plurality of detection lines in the touch screen, and each detection line in each row group is synchronously touch-detected, and in determining a certain row group
  • a pixel column of touch feedback that is, when a pixel is touched, a charge carried by a capacitor at the position or a resistance of the resistor at the position changes, and a feedback signal is generated
  • the pixel column is located in the selected detection line.
  • the pixel points are touch-detected to determine the touch pixel point.
  • the touch detection method and the touch detection device can reduce the number of detections, thereby effectively reducing the operation rate requirement of the touch screen processor, and shortening the total of the touch detection. Time, increase the reaction rate, and solve the problem that the device responds too slowly, pauses or does not respond due to too many touch detections.
  • the embodiment of the present invention provides a touch detection method. As shown in FIG. 5, the method may include: Step 501: Perform row group division on multiple detection lines in the touch screen.
  • the touch screen has N detection lines.
  • line group division the following division manners may be adopted but are not limited thereto:
  • Step 502 Determine the selected detection line from each of the row groups.
  • the selected detection line is determined from each row group according to requirements, and other detection lines except the selected detection line are regarded as non-selected detection lines, wherein:
  • the detection line can be directly regarded as a non-selected detection line, and at this time, no detection line is selected in the line group;
  • N-1 detection lines are selected as the selected detection lines from the N detection lines, and the remaining one detection line is regarded as the unselected detection line.
  • the number of unselected detection lines in each row group is generally 1, it is also possible to select the remaining detection lines from each of the row groups and determine the remaining detection lines as the determined ones. Select the test line. For example, you can use the first detected row in each row group as a non-selected test Rows, you can also use the last detected row in each row group as a non-selected row. It is also possible to select a detection row having a different relative position as a non-selected detection row for different row groups, for example, the first detection row in the first row group is regarded as a non-selected detection row, and the third detection in the second row group is detected. The row serves as a non-selected detection row, and the first detection row in the third row group is regarded as a non-selected detection row.
  • Step 503 Perform main touch detection on each pixel in each detection row of each row group, wherein the touch detection for the pixel points in the same pixel column in the same row group is performed synchronously, that is, by one detection. Detects all pixels in the same row group that are in the same pixel column.
  • step 503 is a touch detection process in the main detection phase in the embodiment of the present invention, and the process may include:
  • Touch detection is performed on each pixel in each of the detection lines of the line group receiving the drive signal based on the feedback information of the line group receiving the drive signal.
  • the detection circuit may generally generate corresponding feedback information for the row group receiving the driving signal, and the feedback information may include, but is not limited to, information such as the number of packets of the row group receiving the driving signal.
  • Step 504 When a pixel column having a touch detection is detected in any one of the row groups, performing sub-touch detection on the pixel points in the selected detection row in the pixel column to determine the touch pixel point.
  • the processor Since the charge of the capacitor at the position or the resistance of the resistor at the position changes when the pixel is touched, a corresponding feedback signal is generated, and the generated feedback signal is sent to the processor.
  • the processor When performing main detection on any one of the row groups, if the pixel points in a certain row group are touched, the processor will receive a feedback signal from the touched pixel point, because it is in the same pixel column for the same row group.
  • the touch detection of the pixel is performed synchronously. Therefore, at this time, the record recorded in the processor is detecting a certain column of a certain row group, so it is not determined that the feedback signal is specifically the column of the row group being detected. Which pixel in the feedback is fed back, at this time, it is necessary to enter the secondary detection phase to determine the touch pixel point.
  • Step 504 is a touch detection process in the sub-detection phase in the embodiment of the present invention.
  • the specific process of performing touch detection on the pixel points in the selected detection row in the pixel column is as follows:
  • the selected detection line to any one of the above line groups is within a preset time length after inputting the drive signal to each detection line in any one of the above line groups.
  • Input drive signal (optionally, input to each detection line in any one of the above line groups)
  • the ratio of the length of the driving signal to the preset length of time may be the same as the number of selected detection lines in any one of the above-mentioned row groups, for example, starting at 10:00:00 for 1 second to detect each of the above-mentioned row groups Line input drive signal, within 1 second thereafter, input drive signal to selected detection lines of any one of the above line groups);
  • each of the above-mentioned row groups is sequentially selected within a preset time length after inputting a driving signal to each detection row in any one of the above-described row groups.
  • the detection line input drive signal (for example, when there are 3 detection lines in any one of the above line groups, starting at 10:00:00, for 1 second, inputting a drive signal to each detection line in any one of the above line groups, at 10 :00:01 to 10:00:02, input the drive signal to one of the selected detection lines in any of the above line groups, at 10:00:02 to 10:00:03, to another of the above-mentioned line groups a selected detection line input drive signal);
  • Touch detection is performed on the pixels in the selected detection line of the received pixel signal in the pixel column in sequence.
  • the specific process of determining the touch pixel point according to the detection result of the sub-detection stage may be as follows: determining that the pixel point is a touch pixel point when determining that there is touch feedback on a pixel point in any one of the selected detection rows;
  • the pixel point in the pixel column of the row group may be temporarily stored, that is, the processor records
  • the main detection result of the pixel points in the pixel column of the currently detected row group is that there is a touch, and then enters the sub-detection phase, and the pixel points located in the selected detection row in the pixel column of the row group are sequentially detected.
  • the touch detection method used in the embodiment of the present invention may adopt any one of the following modes, but is not limited thereto: a resistive touch detection method, a capacitive touch detection method, an infrared touch detection method, a surface acoustic wave touch detection method, and Electromagnetic touch detection method.
  • the touch screen is divided into 2500 line groups, where the first line and the second line are one
  • the row group, the third row and the fourth row are a row group, ... the 4999th row and the 5000th row are a row group.
  • the number of tests (10000 x 5000) was reduced by nearly half.
  • the touch screen will be 2000 line groups, where the first line, the second line, and the third line are one line group, the fourth line, the first line 5 lines and 6th line a line group, ..., line 5995, line 5996, and line 5997 behave one line group, line 5998 and line 5999 behave one line group, at this time if the pixel is touched In the last row group, the number of touch detections is 10000 x 2000+1 times. If the touch pixel is in other row groups, the number of touch detections is 10000 x 2000+2 times. Obviously, this is more than the touch of the traditional touch detection method. The number of inspections (10000 5999) is reduced by about two-thirds, which can greatly shorten the inspection time.
  • Fig. 6A is a timing chart of driving signals in a touch detecting method in which two detection behaviors are grouped in a row in accordance with an embodiment of the present invention.
  • touch detection is performed on pixels in the same pixel column in the first row and the second row, and pixels in the same pixel column among the pixels in the third row and the fourth row are detected.
  • Point synchronization performs touch detection, and touch detection is performed on pixels in the same pixel column among the pixels in the 5th row and the 6th row, and the touch detection is performed on the entire touch screen.
  • the voltage source can input the main detection driving signal for the first row and the second row in the first period, and the sub-detection driving signal for the second row in the second period. .., input the main detection drive signal for the N-1th line and the Nth line in the N-1th cycle, and input the secondary detection drive signal to the Nth line in the Nth cycle.
  • the detection circuit can be in the first cycle to the first line. Synchronous main detection is performed with each pixel in the second row. If the main detection result indicates that there is a touch at the pixel in the Mth column, the pixel in the second row and the Mth column is detected in the second period, where M Is a positive integer greater than zero.
  • the detection circuit can perform main detection on the points in the same pixel column in each row, for example, synchronizing the pixels in the first row and the first column and the pixels in the second row and the first column.
  • Touch detection performs touch detection or the like on the pixel points of the first row and the second column and the pixels of the second row and the second column.
  • the pixel point in the selected detection row in the pixel column is subjected to secondary detection, and it is determined that the pixel column is located in the selected detection. Whether the pixel in the row is touched, and if so, it is determined that the pixel column is selected The pixel points in the detection line are touched, otherwise, it is determined that the pixel points in the non-selected detection line in the pixel column are touched.
  • the main detection is performed on the first line and the second line at the same time. If the detection result indicates that the pixel in the second column is touched, that is, both P12 and P22 may be touched, the P22 in the second line is detected. If the detection result of P22 indicates that it is touched, it is determined that P22 is a touch pixel point, and if the detection result of P22 indicates that it is not touched, it is determined that P12 is a touch pixel point.
  • FIG. 6B is a schematic diagram showing the result of performing main detection in the embodiment of the present invention
  • FIG. 6C is a schematic diagram of performing sub-detection in the embodiment of the present invention.
  • the voltage source can input the main detection driving signal to the first row and the second row in the first period, and the sub-detection driving signal to the first row in the second period, and the third row to the third row and
  • the fourth line inputs the main detection drive signal, and the fourth detection input drive signal is input to the third line in the fourth period, and the main detection drive is input to the N-1th line and the Nth line in the N-1th cycle.
  • the signal inputs a secondary detection driving signal to the N-1th line in the Nth cycle, and so on, and performs touch detection on the entire touch screen.
  • the voltage source can input the main detection driving signal to the first line in the first period, the main detection driving signal to the second line and the third line in the second period, and the second line input in the third period.
  • the detection drive signal is input, the main detection drive signal is input to the 4th line and the 5th line in the fourth period, the sub-detection drive signal is input to the 4th line in the fifth period, and so on, and the entire touch screen is touch-detected.
  • the voltage source can input the main detection driving signal to the first row in the first cycle, the main detection driving signal to the second row and the third row in the second cycle, and the third row input in the third cycle.
  • the sub-detection drive signal is input to the main detection drive signal in the fourth and fifth rows in the fourth cycle, the sub-detection drive signal is input to the fifth row in the fifth cycle, and so on, and the entire touch screen is touch-detected.
  • the touch screen may be detected by the touch detection method in the above embodiment, but the present invention is not limited thereto.
  • the touch detection methods in the above embodiments can be combined.
  • the touch detection may be divided into two detection stages: a primary detection and a secondary detection (auxiliary detection); in the main detection phase, a main detection is performed for each detection line in each row group in turn, Synchronous touch detection is performed on pixels in the same pixel group in the same row group; in the sub-detection phase, if there is a pixel column in the any row group, the selected detection in the pixel column is sequentially performed. Touch detection is performed on the pixels in the line to determine the touch pixel point. In this way, the number and total time of the touch detection are shortened, and the problem that the device has responded to the 'fman, pause or no response caused by the excessive number of touch detections in the prior art is solved.
  • auxiliary detection auxiliary detection
  • the embodiment of the present invention further provides a touch detection device.
  • the touch detection device may include:
  • Dividing module 1001 performing row group division on multiple detection lines in the touch screen
  • the pants selection module 1002 selects a detection line from each line group
  • the detecting module 1003 performs touch detection on each pixel in each detection row in each row group, wherein the touch detection for the pixel points in the same pixel column in the same row group is performed synchronously; and when in any row When a pixel column having touch feedback is detected in the group, touch detection is performed on the pixel points in the selected detection row in the pixel column in turn to determine the touch pixel point.
  • the foregoing detecting module 1003 can be specifically configured to:
  • the selected detection line to any one of the above line groups is within a preset time length after inputting the drive signal to each detection line in any one of the above line groups.
  • Inputting a driving signal if the number of selected detection lines of any one of the above-mentioned row groups is greater than 1, then sequentially to any one of the above-mentioned row groups within a preset time length after inputting a driving signal to each detection line in any one of the above-mentioned row groups
  • Each of the selected detection lines inputs a drive signal; and sequentially performs pixel detection on the pixel points in the selected detection line of the received pixel signal in the pixel column.
  • the ratio of the length of time to the input of the driving signal to the detection line of any one of the above-mentioned row groups and the preset time length may be the same as the number of selected detection lines in any one of the above-mentioned row groups.
  • the above detection module 1003 can also be used to:
  • the detection module 1003 can perform touch detection on the pixel points by using any one of the following methods: a resistive touch detection method, a capacitive touch detection method, an infrared touch detection method, and a surface acoustic wave touch detection method. And electromagnetic touch detection method.
  • a resistive touch detection method a capacitive touch detection method
  • an infrared touch detection method a capacitive touch detection method
  • a surface acoustic wave touch detection method a surface acoustic wave touch detection method.
  • electromagnetic touch detection method electromagnetic touch detection method.
  • the touch detection device described above may correspond to the flow of the above touch detection method, and details are not described herein again.
  • row detection is performed on a plurality of detection lines in the touch screen, and pixel detections in the same pixel column in each row group are synchronously detected by touch, and there is a presence of a touch in a certain row group.
  • touch detection is performed on the pixel points in the selected detection row of the pixel column, thereby determining the touch pixel point, which reduces the number of detections compared with the conventional method for sequentially performing touch detection on each pixel point, and is effective.
  • the operation rate requirement of the touch screen processor is reduced, the total time of the touch detection is shortened, the reaction rate is improved, and the problem that the device responds by (man, pause or no response caused by too many touch detection times is solved).

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Abstract

本发明实施例公开了一种触摸检测方法以及触摸检测装置。该触摸检测方法可以包括：对触摸屏中的多个检测行进行行组划分；从每一个行组中确定选定检测行；对每一个行组中每一检测行内的各像素点进行主触摸检测，其中，针对同一行组中位于同一像素列的像素点的触摸检测是同步进行的；在任意一个行组中有存在触摸反馈的像素列时，对所述像素列中的选定检测行内的像素点进行次触摸检测，确定触摸像素点。根据实施例的触摸检测方法和触摸检测装置可以解决现有技术中存在的触摸检测次数过多导致的设备出现响应过慢、停顿或无响应的问题。

Description

触摸检测方法以及触摸检测装置 技术领域
本发明的实施例涉及触摸检测方法以及触摸检测装置。 背景技术
目前已有的触摸屏检测方式包括： 电阻式触摸检测方式、 电容式触摸检 测方式、 红外触摸检测方式、 声表面波触摸检测方式、 电磁触摸检测方式等 等。 手机和平板电脑等移动设备的触摸屏通常采用的是电阻式技术和电容式 技术。 在电阻式技术中， 触摸面板被涂覆了两层铟锡氧化物 （ Indium Tin Oxides, ITO ) 。 当采用电阻式技术的触摸面板被触摸时， 这两个 ΙΤΟ层发 生接触， 使得被触摸位置对应的一个开关闭合， 相应信息被发送到处理器用 于进一步处理。 在电容式技术中， 触摸面板被涂覆了一种能够存储电荷的材 料。 当采用电容式技术的触摸面板被触摸时， 少量电荷被吸引到接触点， 位 于触摸面板中的电路测量被吸引到接触点的电荷， 并把相应信息发送到处理 器用于处理。
上述触摸屏技术均采用逐行扫描的方式来检测触摸， 把触摸敏感器（即 触摸面板） 的变化存储到处理器中， 处理器将触摸敏感器的变化转换成显示 屏上的对应坐标， 系统根据对应坐标的位置执行用户操作。
图 1为电容式触摸屏系统的方框图。 图 2为互电容电路的筒化示意图， 该互电容电路包括传感线 111、驱动线 112和电容耦合节点 113 (即检测单元 Co ) , 其中传感线 111和驱动线 112是空间分离的。 驱动线 112连接在电压 源 120和电容耦合节点 113之间， 用于向电容耦合节点 113传输驱动信号。 传感线 111连接在电容耦合节点 113和电容检测电路 130之间， 向电容检测 电路 130传送电容耦合节点 113的检测信号。 114和 115是触摸面板的涂层 之间产生的寄生电容。
下面以电容耦合节点 113为例说明触摸检测过程。
在电容耦合节点 113没有被触摸时， 电容耦合节点 113上的电荷保持恒 定。在电容耦合节点 113被触摸时，检测单元 C。携带的电荷发生变化，此时， 通过传感线 111将电荷发生变化的检测信号传送给电容检测电路 130。 电容 检测电路记录出现电荷变化的电容耦合节点 113的位置信息， 并将记录结果 发送给处理器， 使处理器执行相应操作。
图 3为传统触摸屏检测方法的示意图， 在传统触摸屏检测方法中依次对 每一行中的各像素点进行触摸扫描， 处理器检测并记录下扫描结果。 针对分 辨率为 M X N的触摸屏 (也就是在该触摸屏中， 像素点的总行数为 N, 总列 数为 M, 其中 M和 N为正整数） ， 如果采用常规触摸屏检测方法进行触摸 屏检测， 则一共需要进行 M X N次检测。
图 4为当采用图 3对应的方法时电压源 120通过各驱动线向各行中的电 容耦合节点输入的驱动信号的示意图。 在第一周期到达时， 向第 1行输入驱 动信号， 令检测电路依次对第 1行中的各像素点 （即， 各电容耦合节点）进 行检测。 在第二周期到达时， 向第 2行中的各电容耦合节点输入驱动信号， 令检测电路依次对第 2行中的各电容耦合节点进行检测。 以此类推， 在第 N 周期到达时， 对第 N行中的各电容耦合节点进行检测， 其中， N为触摸屏的 行数。
通过上述分析可知， 随着触摸屏分辨率的上升， 处理器的检测次数成倍 增加， 对处理器的运算速率的要求也更高， 一旦处理器的运算速率无法在短 时间内提高到相应水平， 设备就会出现响应过慢、 停顿或无响应 （例如， 死 机） 的情况。 发明内容
本发明实施例提供了可减少检测次数的触摸检测方法以及触摸检测装 置，从而能够解决现有技术中存在的触摸检测次数过多导致的设备响应过慢、 停顿或无响应的问题。
本发明实施例提供一种触摸检测方法， 包括：
对触摸屏中的多个检测行进行行组划分；
从每一个行组中确定选定检测行；
对每一个行组中每一检测行内的各像素点进行主触摸检测， 其中， 针对 同一行组中位于同一像素列的像素点的触摸检测是同步进行的；
当在任意一个行组中检测到存在触 ¾ ^馈的像素列时， 对上述像素列中 的选定检测行内的像素点进行次触摸检测， 确定触摸像素点。
本发明实施例还提供一种触摸检测装置， 包括：
划分模块， 对触摸屏中的多个检测行进行行组划分；
选择模块， 从每一个行组中确定选定检测行；
检测模块， 对每一个行组中每一检测行内的各像素点进行主触摸检测， 其中， 针对同一行组中位于同一像素列的像素点的触摸检测是同步进行的； 以及当在任意一个行组中检测到存在触摸反馈的像素列时， 对上述像素列中 的选定检测行内的像素点进行次触摸检测， 确定触摸像素点。
与传统方法中对每个像素点依次进行触摸检测相比， 根据本发明实施例 的触摸检测方法以及触摸检测装置减少了检测次数， 有效地降低了对触摸屏 处理器的运算速率要求， 缩短触摸检测的总时间， 提高了反应速率， 解决了 触摸检测次数过多导致的设备响应过慢、 停顿或无响应的问题。 附图说明
图 1为电容式触摸屏系统的方框图；
图 2为互电容电路的筒化示意图；
图 3为传统触摸屏检测方法的示意图； 合节点输入的驱动信号的示意图；
图 5为根据本发明实施例的一种触摸检测方法的示意图；
图 6A为根据本发明实施例的触摸检测方法的驱动信号的时序图， 在该 触摸检测方法中每个行组包括 2个检测行；
图 6B为本发明实施例中进行主检测后的结果的示意图；
图 6C为本发明实施例中进行次检测的示意图；
图 7为根据本发明另一实施例的触 4莫检测方法的驱动信号的时序图， 在 该触摸检测方法中每个行组包括 2个检测行；
图 8为根据本发明另一实施例的触摸检测方法的驱动信号的时序图， 在 该触摸检测方法中各行组包括不同数目的检测行；
图 9为根据本发明另一实施例的触摸检测方法的驱动信号的时序图， 在 该触摸检测方法中各行组包括不同数目的检测行； 以及 图 10为根据本发明另一实施例的触摸检测装置的示意图。 具体实施方式
在本发明实施例提供的触摸检测方法以及触摸检测装置中， 对触摸屏中 的若干检测行进行行组划分,对每一个行组中的各检测行同步进行触摸检测， 在确定某一行组中有存在触摸反馈的像素列 （即有像素点被触摸， 该位置的 电容携带的电荷或该位置的电阻的阻值等发生变化， 产生了反馈信号） 时， 对该像素列中位于选定检测行内的像素点进行触摸检测， 从而确定触摸像素 点。 与传统对每个像素点依次进行触摸检测相比， 根据本发明实施例的触摸 检测方法以及触摸检测装置可以减少检测次数， 从而有效地降低对触摸屏处 理器的运算速率要求， 缩短触摸检测的总时间， 提高反应速率， 解决触摸检 测次数过多导致的设备响应过慢、 停顿或无响应的问题。
下面结合附图说明本发明的优选实施例。
本发明实施例提供了一种触摸检测方法，如图 5所示，该方法可以包括： 步骤 501: 对触摸屏中的多个检测行进行行组划分。
假设触摸屏的分辨率为 Μ χ N, 该触摸屏具有 N个检测行， 在进行行组 划分时， 可以采用下述划分方式但不限于此：
将该触摸屏中每两行分为一个行组， 或者， 将每三行分为一个行组， 或 者， 每四行分为一个行组， 或者采用不同行组的检测行数目并非都相同的划 分方式。 具体的行组划分方式可以根据实际需求选定， 并且可以划分出多个 行组中检测行的数目并不相同的行组。
步骤 502: 从每一个行组中确定选定检测行。
实际应用中， 根据需求从每一行组中确定选定检测行， 将除选定检测行 之外的其它检测行作为非选定检测行， 其中：
在确定划分后的任意一个行组中只有一个检测行时， 可以直接将该检测 行作为非选定检测行， 此时该行组中没有选定检测行；
在确定划分后的任意一个行组中存在 N个检测行时，从这 N个检测行中 选择 N-1个检测行作为选定检测行，将剩余的一个检测行作为非选定检测行。
实际应用中， 由于每一个行组中的非选定检测行的数目一般为 1 , 因此， 也可以从每一个行组中选择出非选定检测行后， 将剩余的检测行作为确定出 的选定检测行。 例如， 可以将每一个行组中的第一个检测行作为非选定检测 行， 也可以将每一个行组中的最后一个检测行作为非选定检测行。 也可以针 对不同行组选择相对位置不同的检测行作为非选定检测行， 例如， 将第一行 组中第一个检测行作为非选定检测行， 第二个行组中第三个检测行作为非选 定检测行， 将第三个行组中的第一个检测行作为非选定检测行。
步骤 503: 对每一个行组中每一检测行内的各像素点进行主触摸检测， 其中， 针对同一行组中位于同一像素列的像素点的触摸检测是同步进行的， 也就是通过一次检测可以检测同一行组中位于同一像素列的所有像素点。
在实际应用中， 步骤 503是本发明实施例中的主检测阶段的触摸检测过 程， 该过程可以包括：
依次向每一个行组中的各检测行输入驱动信号；
根据接收到驱动信号的行组的反馈信息， 对上述接收到驱动信号的行组 中每一个检测行内的各像素点进行触摸检测。
实际应用中， 一般可以由检测电路针对接收到驱动信号的行组生成相应 的反馈信息， 该反馈信息中可以包括但不限于： 接收到驱动信号的行组所包 点数目等信息。
步骤 504: 当在任意一个行组中检测到存在触 ¾ ^馈的像素列时， 对上 述像素列中的选定检测行内的像素点进行次触摸检测， 确定触摸像素点。
由于在像素点被触摸时， 该位置的电容的电荷或者该位置的电阻的阻值 等会发生变化， 进而产生相应的反馈信号， 并且产生的反馈信号被发送到处 理器。在对任意一个行组进行主检测时，如果某一个行组中的像素点被触摸， 此时处理器会接收到来自被触摸的像素点的反馈信号， 由于针对同一行组中 位于同一像素列的像素点的触摸检测是同步进行的， 因此， 此时处理器中记 录的正在检测的是某一行组的某一列， 故而还不能确定该反馈信号具体是由 正在检测的该行组的该列中的哪一个像素点反馈的， 此时， 需要进入次检测 阶段来确定触摸像素点。
步骤 504是本发明实施例中的次检测阶段的触摸检测过程， 对像素列中 的选定检测行内的像素点进行触摸检测的具体过程如下：
若上述任意一个行组的选定检测行数目为 1 , 则在向上述任意一个行组 中的各检测行输入驱动信号之后的预设时间长度内， 向上述任意一个行组的 选定检测行输入驱动信号（可选地， 向上述任意一个行组中的各检测行输入 驱动信号的时间长度和预设时间长度的比值可以与上述任意一个行组中选定 检测行的数目相同， 例如， 10:00:00开始， 持续 1秒向上述任意一个行组中 的各检测行输入驱动信号， 在此后的 1秒内， 向上述任意一个行组的选定检 测行输入驱动信号）；
若上述任意一个行组的选定检测行数目大于 1 , 则在向上述任意一个行 组中的各检测行输入驱动信号之后的预设时间长度内， 依次向上述任意一个 行组中的各选定检测行输入驱动信号（例如， 在上述任意一个行组中有 3个 检测行时， 10:00:00开始， 持续 1秒向上述任意一个行组中的各检测行输入 驱动信号， 在 10:00:01到 10:00:02, 向上述任意一个行组中的一个选定检测 行输入驱动信号， 在 10:00:02到 10:00:03 , 向上述任意一个行组中的另一个 选定检测行输入驱动信号）；
依次对上述像素列中的接收到驱动信号的选定检测行内的像素点进行触 摸检测。
根据次检测阶段的检测结果确定触摸像素点的具体过程可以如下： 在确定上述像素列中任意一个选定检测行内的像素点存在触摸反馈时， 确定上述像素点为触摸像素点；
在确定上述像素列中每一个选定检测行内的像素点都不存在触摸反馈 (即该像素点没有被触摸， 该位置的电容携带的电荷或者该位置的电阻的阻 值等没有发生变化）或上述任意一个行组中不存在选定检测行时， 将上述任 意一个行组中位于上述像素列中非选定检测行内的像素点确定为触摸像素 点。
在实际应用中， 在对某一行组进行主检测时， 如果确定该行组中有存在 触摸反馈的像素列， 可以先将位于该行组该像素列中的像素点暂存， 即处理 器记录当前检测到的该行组该像素列中的像素点的主检测结果为存在触摸， 然后进入次检测阶段， 依次对该行组该像素列中位于选定检测行中的像素点 进行次检测。
本发明实施例所采用的触摸检测方式， 可以采用下述方式中的任意一种 但不限于此： 电阻式触摸检测方式、 电容式触摸检测方式、 红外触摸检测方 式、 声表面波触摸检测方式和电磁触摸检测方式。
在上述实施例中， 如果触摸屏的分辨率为 10000 5000 (即有 10000列，
5000行）， 此时将触摸屏划分为 2500个行组， 其中， 第 1行和第 2行为一个 行组，第 3行和第 4行为一个行组， ……第 4999行和第 5000行为一个行组， 此时， 触摸检测次数为 0.5 10000 5000+1=25000001次， 比传统的检测方 式的触摸检测次数（ 10000 x 5000 )减少近一半。
如果触摸屏的分辨率为 10000 5999 (即有 10000列， 5999行 ), 此时将 触摸屏为 2000个行组， 其中， 第 1行、 第 2行和第 3行为一个行组， 第 4 行、 第 5行和第 6行为一个行组， ... ...， 第 5995行、 第 5996行和第 5997 行为一个行组， 第 5998行和第 5999行为一个行组， 此时如果触摸像素点在 最后一个行组中， 触摸检测次数为 10000 x 2000+1次， 如果触摸像素点在其 它行组中， 触摸检测次数则为 10000 x 2000+2次， 显然， 这比传统的触摸检 测方式的触摸检测次数（ 10000 5999 )减少了大约三分之二， 可以大大缩 短检测时长。
图 6A为根据本发明实施例的触摸检测方法中的驱动信号的时序图， 在 该触摸检测方法中以 2个检测行为一行组。 在图 6A中的主检测阶段中， 对 第 1行和第 2行中位于同一像素列的像素点同步进行触摸检测， 对第 3行和 第 4行中的像素点中位于同一像素列的像素点同步进行触摸检测 , 对第 5行 和第 6行中的像素点中位于同一像素列的像素点同步进行触摸检测 , 以此类 推对整个触摸屏进行触摸检测。
在图 6A中进行触摸检测的过程中， 电压源可以在第一周期对第 1行和 第 2行输入主检测驱动信号，在第二周期对第 2行输入次检测驱动信号， ... ...， 在第 N-1周期对第 N-1行和第 N行输入主检测驱动信号，在第 N周期对第 N 行输入次检测驱动信号， 检测电路可以在第一周期对第 1行和第 2行中的各 像素点进行同步主检测，若主检测结果表明第 M列中的像素点存在触摸， 则 在第二周期对第 2行第 M列像素点进行次检测， 其中， M为大于 0的正整 数。
在对两行同步进行主检测时， 检测电路可以对每行中位于相同像素列的 点同步进行主检测， 例如， 对第 1行第 1列像素点和第 2行第 1列像素点同 步进行触摸检测， 对第 1行第 2列像素点和第 2行第 2列的像素点同步进行 触摸检测等。
如果确定任意一个行组的主检测结果表明某像素列中的像素点被触摸， 则对该像素列中的位于选定检测行中的像素点进行次检测， 判断该像素列中 位于选定检测行中的像素点是否被触摸， 若是， 则判定该像素列中位于选定 检测行中的像素点被触摸， 否则， 判定该像素列中位于非选定检测行中的像 素点被触摸。
例如， 同时对第 1行和第 2行进行主检测， 若检测结果表明第 2列中的 像素点被触摸，即 P12和 P22都可能被触摸，则对第 2行中的 P22进行检测。 若 P22的检测结果表明被触摸， 则确定 P22为触摸像素点， 若 P22的检测结 果表明没有被触摸， 则确定 P12为触摸像素点。 图 6B为本发明实施例中进 行主检测后的结果的示意图， 图 6C为本发明实施例中进行次检测的示意图。
图 7为根据本发明另一实施例的触摸检测方法的驱动信号的时序图， 在 该触摸检测方法中以 2个检测行为一行组。 如图 7所示， 电压源可以在第一 周期对第 1行和第 2行输入主检测驱动信号， 在第二周期对第 1行输入次检 测驱动信号， 在第三周期对第 3行和第 4行输入主检测驱动信号， 在第四周 期对第 3行输入次检测驱动信号， ... ...， 在第 N-1周期对第 N-1行和第 N行 输入主检测驱动信号， 在第 N周期对第 N-1行输入次检测驱动信号， 以此类 推， 对整个触摸屏进行触摸检测。
图 8为根据本发明另一实施例的触摸检测方法的驱动信号的时序图， 在 该触摸检测方法中各行组的检测行的数目可以不同。 如图 8所示， 电压源可 以在第一周期对第 1行输入主检测驱动信号， 在第二周期对第 2行和第 3行 输入主检测驱动信号， 在第三周期对第 2行输入次检测驱动信号， 在第四周 期对第 4行和第 5行输入主检测驱动信号， 在第五周期对第 4行输入次检测 驱动信号， 以此类推， 对整个触摸屏进行触摸检测。
图 9为根据本发明另一实施例的触摸检测方法的驱动信号的时序图， 在 该触摸检测方法中各行组的检测行的数目可以不同。 如图 9所示， 电压源可 以在第一周期对第 1行输入主检测驱动信号， 在第二周期对第 2行和第 3行 输入主检测驱动信号， 在第三周期对第 3行输入次检测驱动信号， 在第四周 期对第 4行和第 5行输入主检测驱动信号， 在第五周期对第 5行输入次检测 驱动信号， 以此类推， 对整个触摸屏进行触摸检测。
在实际应用中， 可以采用上述实施例中的触摸检测方式对触摸屏进行检 测， 但本发明不限于此。 为提高检测精确度， 可以将上述实施例中的触摸检 测方式两两结合。
在上述实施例中， 触摸检测可以分为主检测和次检测 （辅助检测） 两个 检测阶段； 在主检测阶段， 依次对每一行组中的各检测行都进行主检测， 其 中， 对同一行组中位于同一像素列的像素点进行同步触摸检测； 在次检测阶 段， 如果任意一个行组中有存在触¾ ^馈的像素列， 依次对该像素列中的选 定检测行内的像素点进行触摸检测， 确定触摸像素点。 这样， 缩短了触摸检 测的次数和总时间， 解决了现有技术中存在的触摸检测次数过多导致的设备 现响应过' f曼、 停顿或无响应的问题。
本发明实施例还提供了一种触摸检测装置，如图 10所示，该触 4莫检测装 置可以包括：
划分模块 1001 , 对触摸屏中的多个检测行进行行组划分；
选裤模块 1002, 从每一个行组中选定检测行；
检测模块 1003 , 对每一个行组中每一检测行内的各像素点进行触摸检 测， 其中， 针对同一行组中位于同一像素列的像素点的触摸检测是同步进行 的； 以及当在任意一个行组中检测到存在触摸反馈的像素列时， 依次对上述 像素列中的选定检测行内的像素点进行触摸检测， 确定触摸像素点。
上述检测模块 1003可以具体用于：
若上述任意一个行组的选定检测行数目为 1 , 则在向上述任意一个行组 中的各检测行输入驱动信号之后的预设时间长度内， 向上述任意一个行组的 选定检测行输入驱动信号； 若上述任意一个行组的选定检测行数目大于 1 , 则在向上述任意一个行组中的各检测行输入驱动信号之后的预设时间长度 内， 依次向上述任意一个行组中的各选定检测行输入驱动信号； 依次对上述 像素列中的接收到驱动信号的选定检测行内的像素点进行触摸检测。
可选地， 向上述任意一个行组中的各检测行输入驱动信号的时间长度和 预设时间长度的比值可以与上述任意一个行组中选定检测行的数目相同。
上述检测模块 1003还可以用于：
在确定所述像素列中任意一个选定检测行内的像素点存在触摸反馈时， 确定所述像素点为触摸像素点； 在确定所述像素列中每一个选定检测行内的 像素点都不存在触摸反馈或所述任意一个行组中不存在选定检测行时， 将所 述任意一个行组中位于所述像素列中非选定检测行内的像素点确定为触摸像 素点。
在上述触摸检测装置中，检测模块 1003可以采用下述方式中的任意一种 对像素点进行触摸检测： 电阻式触摸检测方式、 电容式触摸检测方式、 红外 触摸检测方式、 声表面波触摸检测方式和电磁触摸检测方式。 上述触摸检测装置可以与以上触摸检测方法的流程——对应， 在此不再 赘述。
在本发明的实施例中， 对触摸屏中的多个检测行进行行组划分， 对每一 个行组中位于同一像素列的像素点同步进行触摸检测， 在确定某一行组中有 存在触 ¾ ^馈的像素列时， 对该像素列中位于选定检测行内的像素点进行触 摸检测， 从而确定触摸像素点， 与传统方法中对每个像素点依次进行触摸检 测相比减少了检测次数， 有效地降低了对触摸屏处理器的运算速率要求， 缩 短触摸检测的总时间， 提高了反应速率， 解决了触摸检测次数过多导致的设 备响应过 '(·曼、 停顿或无响应的问题。
尽管已描述了本发明的优选实施例， 但本领域内的技术人员一旦得知了 基本创造性概念， 则可对这些实施例做出另外的变更和修改。 所以， 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 脱离本发明实施例的精神和范围。 这样， 倘若本发明实施例的这些修改和变 型属于本发明权利要求及其等同技术的范围之内， 则本发明也意图包含这些 改动和变型在内。

Claims

权利要求书
1、 一种触 4莫检测方法， 包括：
步骤 S1: 对触摸屏中的多个检测行进行行组划分；
步骤 S2: 从每一个行组中确定选定检测行；
步骤 S3: 对每一个行组中每一检测行内的各像素点进行主触摸检测， 在 主触摸检测中针对同一行组中位于同一像素列的像素点的触摸检测是同步进 行的；
步骤 S4: 在任意一个行组中检测到存在触 ¾ 馈的像素列时， 对所述像 素列中的选定检测行内的像素点进行次触摸检测， 确定触摸像素点。
2、 如权利要求 1所述的方法， 其中所述步骤 S3包括：
依次向每一个行组中的各检测行输入驱动信号；
根据接收到驱动信号的行组的反馈信息， 对所述接收到驱动信号的行组 中每一个检测行内的各像素点进行触摸检测。
3、 如权利要求 1所述的方法， 其中所述步骤 S4中进行的次触摸检测包 括：
如果所述任意一个行组的选定检测行数目为 1 , 则在向所述任意一个行 组中的各检测行输入驱动信号之后的预设时间长度内， 向所述任意一个行组 的该个选定检测行输入驱动信号并对所述像素列中的该个选定检测行内的像 素点进行触摸检测；
如果所述任意一个行组的选定检测行数目大于 1 , 则在向所述任意一个 行组中的各检测行输入驱动信号之后的预设时间长度内， 依次向所述任意一 个行组中的各选定检测行输入驱动信号并对所述像素列中的接收到驱动信号 的选定检测行内的像素点进行触摸检测。
4、如权利要求 3所述的方法，其中向所述任意一个行组中的各检测行输 入驱动信号的时间长度和预设时间长度的比值与所述任意一个行组中选定检 测行的数目相同。
5、 如权利要求 1-4中任一项所述的方法， 其中所述步骤 S4包括： 在确定所述像素列中任意一个选定检测行内的像素点存在触摸反馈时， 确定所述像素点为触摸像素点；
在确定所述像素列中每一个选定检测行内的像素点都不存在触 ¾ ^馈或 所述任意一个行组中不存在选定检测行时， 将所述任意一个行组中位于所述 像素列中非选定检测行内的像素点确定为触摸像素点。
6、如权利要求 1所述的方法， 其中采用电阻式触摸检测方式、 电容式触 摸检测方式、 红外触摸检测方式、 声表面波触摸检测方式和电磁触摸检测方 式中的任意一种对像素点进行触摸检测。
7、 一种触 4莫检测装置， 包括：
划分模块， 对触摸屏中的多个检测行进行行组划分；
选择模块， 从每一个行组中确定选定检测行；
检测模块， 对每一个行组中每一检测行内的各像素点进行主触摸检测， 其中， 针对同一行组中位于同一像素列的像素点的触摸检测是同步进行的； 以及在任意一个行组中有存在触摸反馈的像素列时， 对所述像素列中的选定 检测行内的像素点进行次触摸检测， 确定触摸像素点。
8、如权利要求 7所述的装置，其中所述检测模块进行的主触摸检测包括： 依次向每一个行组中的各检测行输入驱动信号；
根据接收到驱动信号的行组的反馈信息， 对所述接收到驱动信号的行组 中每一个检测行内的各像素点进行触摸检测。
9、如权利要求 8所述的装置，其中所述检测模块进行的所述次触摸检测 包括：
如果所述任意一个行组的选定检测行数目为 1 , 则在向所述任意一个行 组中的各检测行输入驱动信号之后的预设时间长度内， 向所述任意一个行组 的该个选定检测行输入驱动信号并对所述像素列中接受到驱动信号的该个选 定检测行进行触摸检测；
如果所述任意一个行组的选定检测行数目大于 1 , 则在向所述任意一个 行组中的各检测行输入驱动信号之后的预设时间长度内， 依次向所述任意一 个行组中的各选定检测行输入驱动信号并对所述像素列中的接收到驱动信号 的选定检测行内的像素点进行触摸检测。
10、 如权利要求 9所述的装置， 其中向所述任意一个行组中的各检测行 输入驱动信号的时间长度和预设时间长度的比值与所述任意一个行组中选定 检测行的数目相同。
11、 如权利要求 6-10中任一项所述的装置， 其中： 当确定所述像素列中任意一个选定检测行内的像素点存在触¾ 馈时， 所述检测模块确定所述像素点为触摸像素点；
当确定所述像素列中每一个选定检测行内的像素点都不存在触 ¾ ^馈或 所述任意一个行组中不存在选定检测行时， 所述检测模块将所述任意一个行 组中位于所述像素列中非选定检测行内的像素点确定为触摸像素点。
12、 如权利要求 7所述的装置， 其中所述检测模块采用电阻式触摸检测 方式、 电容式触摸检测方式、 红外触摸检测方式、 声表面波触摸检测方式和 电磁触摸检测方式中的任意一种对像素点进行触摸检测。
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