WO2021022804A1 - 触控检测方法、驱动器及触控显示装置 - Google Patents

触控检测方法、驱动器及触控显示装置 Download PDF

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Publication number
WO2021022804A1
WO2021022804A1 PCT/CN2020/076832 CN2020076832W WO2021022804A1 WO 2021022804 A1 WO2021022804 A1 WO 2021022804A1 CN 2020076832 W CN2020076832 W CN 2020076832W WO 2021022804 A1 WO2021022804 A1 WO 2021022804A1
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Prior art keywords
touch
type
blanking period
touch object
display
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PCT/CN2020/076832
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English (en)
French (fr)
Inventor
刘卫平
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敦泰电子（深圳）有限公司
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Priority to US17/610,218 priority Critical patent/US11726606B2/en
Publication of WO2021022804A1 publication Critical patent/WO2021022804A1/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
    • 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
    • G06F3/0418—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
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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

Definitions

  • the present invention relates to the field of display touch technology, in particular to a touch detection method and a driver capable of realizing the touch detection method and a touch display device using the driver.
  • More and more smart devices integrate display and touch functions at the same time.
  • One way to achieve the above functions is to time-multiplex the display electrodes of smart devices, that is, divide different working time periods. Perform display and touch.
  • Existing touch methods include a method that uses an active touch object for touch and a method that uses a passive touch object for touch.
  • the active touch object is, for example, an active stylus, which can actively emit scanning signals.
  • the smart device receives and detects the scan signal emitted by it.
  • Passive touch objects are, for example, fingers and passive pens, which cannot emit scanning signals. When the finger touches the smart device, the smart device emits the scanning signal. Therefore, smart devices detect the touch operations of the above two objects in different ways, and for smart devices that can detect the touch operations of the above two objects at the same time, one way is to do it in each work cycle , Time-sharing detection of active touch objects, detection of passive touch objects' touch operations, and display screens.
  • the problem with the above method is that two touch detections (detection of active touch objects and detection of passive touch objects) are performed in all working cycles, and if there is no active touch object, the active detection The touch operation of the multi-touch object is not conducive to saving the power consumption of the smart device.
  • One aspect of the present invention provides a touch detection method applied to a touch display device, wherein the touch display device works in a plurality of display frames, and there is a touch detection method between every two adjacent display frames.
  • One-type blanking period each of the display frames includes at least one second-type blanking period and at least one third-type blanking period;
  • the touch detection method includes:
  • the touch of the first touch object or/and the second touch object is detected. Control operation.
  • Another aspect of the present invention provides a driver, the driver is applied to a touch display device, the touch display device works in a plurality of display frames, each of the two adjacent display frames has a one-type A blanking period, each of the display frames includes at least one second-type blanking period and at least one third-type blanking period;
  • the driver includes:
  • the first detection module is configured to detect the touch operation of the first touch object during at least one of the one-type blanking periods
  • a judging module for judging whether there is a second touch object during the at least one second-class blanking period
  • the second detection module is configured to detect the first touch object or/and the first touch object during at least part of the three types of blanking periods belonging to the same display frame as the at least one second type of blanking period according to the judgment result Touch operation of the second touch object.
  • touch display device works in a plurality of display frames, each of the two adjacent display frames has a one-type blanking period, each The display frame includes at least one second-type blanking period and at least one third-type blanking period; the touch display device includes:
  • a driver the driver is used to drive the touch display module to detect the touch operation of the first touch object during at least one of the first type blanking period, and during the at least one second type of blanking period,
  • the touch display module is driven to determine whether there is a second touch object, and the driver is further configured to, according to the determination result, belong to at least part of the three types in the same display frame as the at least one second type blanking period During the blanking period, the touch display module is driven to detect the touch operation of the first touch object or/and the second touch object;
  • the driver drives the touch display module to display images.
  • the touch detection method provided by the embodiment of the present invention is applied to a touch display device.
  • the touch display device works in multiple display frames. By configuring a one-type blanking period between each display frame, and in each display frame Configure at least one second-type blanking period and at least one third-type blanking period in at least one of the first-type blanking periods to detect the touch operation of the first touch object, and determine whether there is a second touch according to the second-type blanking period.
  • the judgment result of the control object is such that at least part of the three types of blanking periods are used to detect the touch operation of the first touch object or/and the second touch object, so that the touch display device can be time-sharing Detect the touch operation of the first touch object and the second touch object, and according to the actual situation (whether there is a second touch object), set three types of touch detection methods for blanking periods (detect the first touch)
  • the control object or/and the touch operation of the second touch object are beneficial to reasonably set the action mode of the touch display device according to different situations, and save the power consumption of the touch display device.
  • FIG. 1 is a schematic diagram of a planar structure of a touch display device according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of a three-dimensional structure of a touch display device according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic diagram of a touch detection method in a working cycle according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic flowchart of a touch detection method according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of another touch detection method according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a touch detection method in a working cycle according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a touch detection method in a working cycle according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic diagram of a touch detection method in a working cycle according to the fourth embodiment of the present invention.
  • FIG. 9 is a schematic diagram of modules of a touch display device according to the fifth embodiment of the present invention.
  • the first type of blanking period T1 is the first type of blanking period T1
  • the first sub-period T11 The first sub-period T11
  • This embodiment provides a touch detection method, which is applied to a touch display device.
  • the touch display device is, for example, a computer, a tablet, a mobile phone, or other smart devices that have both display and touch functions.
  • the touch display device 10 includes a substrate 11.
  • the substrate 11 is a thin-film transistor (TFT) substrate.
  • the substrate 11 defines a display area 111 and a non-display area 112 surrounding the display area 111.
  • the display area 111 is the area where the touch display device 10 displays images, and the non-display area 112 is used to set the internal electronics of the touch display device 10. Components (such as touch detection driver, display driver), wiring, etc.
  • the touch display device 10 further includes a gate driver 12, a source driver 13 and a touch detection driver 14 arranged in the non-display area.
  • a plurality of parallel gate lines G1 to Gm and a plurality of parallel gate lines G1 to Gm are also arranged on the substrate 11.
  • the arranged data lines D1 to Dn, the gate lines G1 to Gm and the data lines D1 to Dn are arranged to cross.
  • the gate driver 12 is electrically connected to the gate lines G1 to Gm.
  • the gate driver 12 outputs a gate scan signal in the order of G1 to Gm to scan each gate line.
  • the source driver 13 is electrically connected to the data lines D1 to Dn, and simultaneously outputs data signals to each data line.
  • the gate driver 12 and the source driver 13 implement the screen display of the touch display device 10 in the above-mentioned manner.
  • the touch display device 10 further includes a plurality of common electrodes 15 formed on the area enclosed by the gate lines G1 to Gm and the data lines D1 to Dn, each common electrode 15 is arranged in an array, and They are electrically connected to the touch detection driver 14 respectively.
  • each common electrode 15 is applied with a common voltage.
  • each common electrode 15 is used as a touch electrode, and a touch scan signal is applied.
  • the touch display device 10 in this embodiment further includes an upper glass substrate 16, a polarizer 17 and a protective cover 18 which are stacked in sequence.
  • the substrate 11 is arranged on a side of the upper glass substrate 16 away from the protective cover 18, and the plurality of common electrodes 15 are arranged between the substrate 11 and the upper glass substrate 16.
  • the surface of the protective cover 18 away from the common electrode 15 is the surface of the touch display device 10 that receives the touch operation.
  • the touch display device 10 when the touch display device 10 performs screen display, it works in multiple display frames T display , that is, when the touch display device 10 displays a dynamic screen, the dynamic screen includes multiple frames of images.
  • the time period is defined as a display frame T display , and, referring to FIG. 1 and FIG. 3 together, a display frame T display also corresponds to the time for the gate driver 12 to scan all the gate lines G1 to Gm.
  • each gate line in each group is continuous arrangement.
  • the time for scanning a group of gate lines is defined as a display sub-frame t display , and the time interval is defined as a second type of blanking period T2 or three types of blanking period T3.
  • each display frame T display includes a plurality of display sub-frames t display , and there are one or two types of blanking periods T2 or one or three types of blanking periods T3 between every two display sub-frames t display , and each display frame T
  • the display includes at least one type two blanking period T2 and at least one type three blanking period T3.
  • the touch display device 10 performs screen display and touch detection in a time-division manner. Specifically, the touch display device 10 performs screen display in each display sub-frame t display , and can perform the screen display in each first-type blanking period T1 and each second-type blanking period Touch detection is performed in the time period T2 and each of the three types of blanking time periods T3.
  • the touch detection function of the touch display device 10 supports detection of touch operations of a first touch object (not shown) and detection of touch operations of a second touch object (not shown).
  • the first touch object is an object that cannot actively send a touch scan signal, that is, a passive touch object.
  • the touch display device 10 needs to actively send a touch scan signal.
  • the touch object is, for example, a finger; the second touch object can actively send out a touch scan signal and can receive the touch scan signal sent by the touch touch display device 10, that is, an active touch object, for example, Active stylus.
  • each display frame T display and the closest one-type blanking period T1 before the display frame T display are collectively defined as a duty cycle T.
  • the working process of the touch display device 10 in each work cycle T is substantially the same. In this embodiment, the working process of the touch display device 10 in multiple consecutive work cycles T will be described in detail below.
  • the touch detection method provided by this embodiment includes:
  • Step S1 detecting the touch operation of the first touch object during at least one of the one-type blanking periods
  • Step S2 in at least one second-type blanking period in each working period T, it is determined whether there is a second touch object.
  • Step S3 According to the judgment result, at least part of the three types of blanking periods belonging to the same display frame as the at least one second type of blanking period in each work cycle T, and detecting the first touch object or/and Touch operation of the second touch object.
  • each display frame T display includes 9 display sub-frames t display , 1 second-type blanking period T2 and 7 third-type blanking periods T3, wherein, the second-type blanking period The period T2 occurs before all the three types of blanking periods T3, and each of the second type of blanking periods T2 and each of the third type of blanking periods T3 are located between two adjacent display sub-frames t display .
  • step S1 in at least one type of blanking period T1, the touch detection driver 14 outputs a touch scan signal to each common electrode 15 to detect the touch operation of the first touch object .
  • a type of blanking period T1 one touch operation of the first touch object can be completely detected. Because the touch display device 10 provided in this embodiment does not need to detect the touch operation of the first touch object in each first blanking period T1. In a one-type blanking period T1, if the touch operation of the first touch object is not detected, the touch display device 10 is idle during this period, that is, the touch display device 10 does not perform any operation during this period.
  • step S2 it is determined whether there is a second touch object during the second-type blanking period T2 in each work cycle T.
  • the plurality of common electrodes 15 are arranged in an array, and the plurality of common electrodes 15 time-sharing form multiple rows arranged in the X direction or multiple columns arranged in the Y direction, and two adjacent common electrodes in each row
  • the electrodes 15 are electrically connected to each other, and two adjacent common electrodes 15 in each column are electrically connected to each other.
  • step S2 the above-mentioned multiple common electrodes form multiple rows arranged along the X direction, and the touch detection driver 14 outputs a touch scan signal to scan each row of the common electrodes 15 to determine whether there is a second touch object at the current moment.
  • the touch detection driver 14 outputs a touch scan signal to scan each row of the common electrodes 15 to determine whether there is a second touch object at the current moment.
  • the coordinates of the second dimension of the control object can be used to finally determine the specific coordinates of the second touch object (of course, in other embodiments, the common electrodes 15 in each column may be scanned first, and then the common electrodes 15 in each row).
  • step S2 it is only necessary to determine whether there is a second touch object and obtain the coordinates of the first dimension without determining the specific coordinates of the second touch object. Therefore, it is not necessary to do a complete touch detection, only It is sufficient to scan the common electrodes 15 of each row or scan the common electrodes 15 of each column.
  • step S3 according to the judgment result in step S2, the working mode of each three-type blanking period T3 belonging to the same display frame T display as the second-type blanking period T2 in each working period T is determined.
  • step S2 If it is determined in step S2 that there is a second touch object, the seven three types of blanking periods T3 mentioned above are all used to detect the touch operation of the second touch object. Since determining the specific coordinates of the second touch object requires scanning the common electrodes 15 of each row and scanning the common electrodes 15 of each column, a three-type blanking period T3 can only complete scanning of the common electrodes 15 of each row or scanning of the common electrodes 15 of each column. Two three types of blanking periods T3 are required to jointly complete a touch operation for detecting the second touch object.
  • the first three-type blanking period T3 in the display frame T display and the adjacent second-type blanking period T2 jointly complete a touch operation for detecting the second touch object
  • the subsequent six third-type blanking periods T3 are Two or two are divided into three groups, the two three-type blanking periods T3 in each group are adjacent, and each group is used to complete a touch operation for detecting the second touch object.
  • step S1 when it is determined in step S2 that there is a second touch object, a total of one touch operation of the first touch object is detected in one duty cycle T.
  • Control operation and detect four touch operations of the second touch object, and complete the display of one frame of image. If the frequency at which the touch display device 10 displays an image is 60 Hz, according to the above-mentioned working process in one duty cycle T, the frequency of detecting the touch operation of the first touch object is also 60 Hz, and the frequency of detecting the touch of the second touch object is also 60 Hz.
  • the frequency of the control operation is 240 Hz.
  • the first touch object is a finger
  • the second touch object is an active stylus. Since the operation of the active stylus is generally faster than the speed of the fingers, it requires The detection frequency of the touch operation is higher than the detection frequency of the finger touch operation, so as to obtain a better touch experience. Therefore, in this embodiment, the detection frequency (240 Hz) of the touch operation on the second touch object is 4 times the detection frequency (60 Hz) of the touch operation on the first touch object, which is beneficial to improve the touch experience.
  • the second type blanking period T2 of the current working cycle T by scanning the common electrodes 15 of each row or column, not only can it be determined whether there is a second touch object, but also when there is a second touch object.
  • a touch operation for detecting a second touch object is completed together with the adjacent one or three types of blanking periods T3. That is, the second-type blanking period T2 is not only used to determine whether there is a second touch object, but also used for touch detection of the second touch object, which helps to save the overall time of touch detection.
  • the time of each working cycle T is the same.
  • the time interval between the second type blanking period T2 and its nearest one or three types of blanking periods T3, and each adjacent three types of blanking periods is the same, so the time interval for detecting the touch operation of the first touch object every two adjacent times is the same as the time interval of detecting the touch operation of the second touch object every two adjacent times. That is, the touch display device 10 performs touch detection evenly, and the user experience is better.
  • step S2 if it is determined in step S2 that there is no second touch object, the seven three types of blanking periods T3 mentioned above are all used to detect the touch operation of the first control object.
  • step S2 determines whether there is no second touch object
  • only one second type blanking period T2 is used to determine whether there is a second touch object
  • the remaining three types of blanking period T3 Both can be used to detect the touch operation of the first touch object. It is beneficial to avoid unnecessary waste of time and unnecessary power consumption, and is also beneficial to increase the frequency of detecting the first touch object, thereby helping to optimize the user's touch experience.
  • step S2 is determined to be no, that is, when there is no second touch object, there is no need to detect the first touch in each of the three types of blanking periods T3.
  • Touch operation of objects In the modified embodiment, three adjacent three-type blanking periods T3 can jointly complete a touch operation for detecting the first touch object. Since one working period T includes seven three-type blanking periods, Therefore, the touch detection of the first touch object can be performed twice, and a three-type blanking period T3 remains, without borrowing the length of the first-type blanking period T1 in the next working period T. In the remaining three types of blanking periods T3, the touch display device 10 is empty, that is, the touch display device 10 does not perform any operation.
  • the empty three-type blanking period T3 can be selected as the fifth three-type blanking period T3 in the current work cycle T. It should be understood that in this modified embodiment, the number of the three types of blanking periods T3 required to jointly complete a touch operation of the first touch object is not used to limit the present invention. In other embodiments, the number of the three types of blanking periods T3 required to jointly complete the detection of one touch operation of the first touch object is set according to actual needs.
  • the three types of blanking periods T3 in one duty cycle T are not all used to detect the touch detection of the first touch object.
  • the frequency of the touch operation of the first touch object meets the requirements, by setting part of the three types of blanking periods T3 to be vacant, it is beneficial to save the power consumption of the touch display device 10.
  • the above-mentioned empty part of the three types of blanking periods T3 are used for the touch display device to perform waterproof detection or/and noise detection, which is beneficial to improve the accuracy of touch detection of the touch display device .
  • the touch detection method provided by this embodiment differs from the first embodiment mainly in that if the step S2 is determined to be yes, that is, when there is a second touch object, there is no need for each of the three types of blanking periods T3 all detect the touch operation of the second touch object, and part of the three types of blanking period T3 is used to detect the touch operation of the second touch object, and the part of the three types of blanking period T3 is used to detect the first touch object Touch operation.
  • a three-type blanking period T3 is only used to detect the touch operation of one of the first touch object and the second touch object, and there is no three-type blanking period T3 that detects both the first touch object and the second touch object. The condition of the touch operation of the second touch object is detected.
  • part of the three types of blanking periods T3 may also be vacant, and the touch display device 10 does not perform any operation during the three types of blanking periods T3 in the vacant state.
  • a duty cycle T includes a type of blanking period T1 and a display frame T display after the type of blanking period T1, and a display frame T display includes 13 displays The sub-frame t display , one second-type blanking period T2 and 11 third-type blanking periods T3, wherein the second-type blanking period T2 is before the 11 third-type blanking periods T3, and each second-type blanking period T2 and each of the three types of blanking periods T3 are located between two adjacent display sub-frames t display .
  • step S2 if it is determined that there is no second touch object in the second type blanking period T2, then the subsequent 11 third types of blanking periods are used to detect the touch operation of the first touch object. Specifically, assuming that six adjacent three-type blanking periods T3 are used to jointly complete a touch operation for detecting the first touch object, 12 three-type blanking periods are required to complete two detections of the first touch object. Touch operation. In this embodiment, since there are only 11 three-type blanking periods T3 in the current display frame T display , a period of time in the first-type blanking period T1 in the next working period T is used to compare with the current display frame T display. In the last five three types of blanking periods T3, a touch detection is completed together, and the remaining time of the first type of blanking period T1 is empty and no operation is performed.
  • step S2 if it is determined that there is a second touch object during the second type blanking period T2, the subsequent 11 third type blanking periods T3 can be set to detect the touch operation of the first touch object , Partly used to detect the touch operation of the second touch object.
  • two adjacent three types of blanking periods T3 jointly complete a touch operation for detecting a second touch object.
  • the second type of blanking period T2 is the same as the first one in the current work cycle T.
  • the three types of blanking period T3 jointly complete the first detection of the second touch object touch operation
  • the third three types of blanking period T3 and the fourth type three blanking period T3 jointly complete the second touch object touch
  • the second detection of the operation, the sixth three-type blanking period T3 and the seventh three-type blanking period T3 jointly complete the third detection of the second touch object touch operation
  • the ninth three-type blanking period T3 and the tenth three-category blanking period T3 jointly complete the fourth detection of the touch operation of the second touch object
  • the hidden period T3 and the eleventh three-type blanking period T3 each separately detect a touch operation of the first touch object.
  • the third type of blanking period T3 detects two touch operations of the first touch object. If the first type of blanking period T1 completes one touch operation of the first touch object, then a total of three touch operations of the first touch object are completed.
  • the above-mentioned 11 three types of blanking periods T3 can be used to detect the first touch object and the second touch object in different allocation methods.
  • the allocation method in this embodiment is beneficial to improve touch Control the uniformity of detection.
  • the action mode of the subsequent three types of blanking period T3 is set as a part Detect the touch operation of the first touch object, and the other part detects the touch operation of the second touch object.
  • one display frame T display includes a plurality of second-type blanking periods T2.
  • each display frame T display includes 9 display sub-frames t display , 3 second-class blanking periods T2 and 5 third-class blanking periods T3, each of the second-class blanking periods T2 and each The three types of blanking periods T3 are all located between two adjacent display sub-frames t display .
  • the following five three types of blanking periods T3 are used to detect the second touch object; if it is determined that there is no second touch For the touch operation of the object, the following five three types of blanking periods T3 are all used to detect the touch operation of the first touch object.
  • the two states of the active stylus operating and leaving on the touch display device 10 are unlikely to switch frequently, the above method steps have been judged multiple times. Based on the first embodiment, it is beneficial to further improve touch detection. The stability prevents misjudgment caused by noise.
  • the touch detection method provided by this embodiment differs from the third embodiment mainly in that the multiple second-type blanking periods T2 included in one display frame T display are not continuous, and every two adjacent ones There is at least one third-type blanking period T3 between the second-type blanking periods T2, and each second-type blanking period T2 is used to determine whether there is a second touch object once, and according to the judgment result of each second-type blanking period T2 Detect the touch operation of the first touch object or/and the second touch object in at least part of the third type blanking period T3 between the second type blanking period T2 and the next second type blanking period T2 .
  • each display frame T display includes 9 display sub-frames, 2 second-class blanking periods T2, and 6 third-class blanking periods T3, where the first second-class blanking period T2 immediately follows After the first-type blanking period T1 of the current working cycle, there are three third-type blanking periods between the first second-type blanking period and the second second-type blanking period T2.
  • the other 3 A third-class blanking period is after the second second-class blanking period T2.
  • the above-mentioned first type two blanking period T2 and the second type two blanking period T2 are separately judged once. If it is determined that there is a second touch object during the first or second type blanking period T2, the second touch object is detected during at least part of the third type blanking period T3 between the second type blanking period and the next second type blanking period T2 If it is determined that there is no second touch object in the second-type blanking period T2, then at least part of the third-type blanking period T3 between the second-type blanking period T2 and the next second-type blanking period T2 The touch operation of the first touch object is detected.
  • the above method steps of this embodiment set two second-type blanking periods T2 separately, and perform two judgments in one work cycle T, which is beneficial to the current
  • the second touch object can be detected in the working period T, and the second touch object does not need to be detected in the next working period T, which helps to improve the efficiency of touch detection.
  • the detection accuracy of the touch operation of the second touch object is higher than the detection accuracy of the touch operation of the first touch object, therefore, in all the foregoing embodiments, if the The at least one second type blanking period T2 determines that there is a second touch object, regardless of how the three types of blanking periods T3 in the current display frame T display are allocated (for detecting the first touch object, for detecting the second Touch objects, or being in an empty state, etc.), should satisfy the requirement that in the current display frame T display , the total time for detecting the touch operation of the second touch object is greater than that used for detecting the touch operation of the first touch object The condition of the total duration.
  • the touch display device 20 provided in this embodiment includes a touch display module 21 and a driver 22.
  • each common electrode 15 in the touch display module 21 is applied with a common voltage when displaying an image, and when the touch display device 20 performs touch detection, a touch scan signal is applied as a touch electrode .
  • the driver 22 is a driver chip or a functional unit in a driver chip, and can also be a driver chip set.
  • the driver 22 is a single driver chip, which can be used as the touch detection driver 14 as shown in FIG. 1, or it can be integrated with the gate driver 12, source driver 13 and touch as shown in FIG.
  • the driver 22 is a driver chip set, which includes a gate driver 12, a source driver 13 and a touch detection driver 14 that are independent of each other as shown in FIG. 1.
  • the touch display device 20 works in a plurality of display frames T display , and there is a type of blanking period T1 between each two adjacent display frames T display , and each display frame T display includes a plurality of display sub-frames t display , There is a second-type blanking period T2 or a third-type blanking period T3 between every two display sub-frames t display , and each display frame T display includes at least one second-type blanking period T2 and at least one third-type blanking period Time period T3.
  • the drive 22 includes:
  • the first detection module 221 is configured to drive the touch display module 21 to detect the touch operation of the first touch object during at least one type of blanking period T1;
  • the determining module 222 is configured to drive the touch display module 21 to determine whether there is a second touch object during the at least one second-type blanking period T2;
  • the second detection module 223 is configured to drive the touch display module 21 during at least part of the three-type blanking period T3 that belongs to the same display frame T display as the at least one second-type blanking period T2 according to the above-mentioned judgment result To detect the touch operation of the first touch object or/and the second touch object.
  • the driver 22 is also used to drive the touch display module 21 to display an image in each display sub-frame t display .
  • driver 22 and the touch display device 20 For the specific working process of the driver 22 and the touch display device 20, please refer to the first to fourth embodiments. It should be understood that the driver 22 and the touch display device 20 provided in this embodiment can be implemented as any of the first to fourth embodiments. One of the steps of the touch detection method can achieve all the beneficial effects described in the first to fourth embodiments.

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Abstract

一种触控检测方法，应用于触控显示装置，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个二类消隐时段及至少一个三类消隐时段；所述触控检测方法包括：在至少一个所述一类消隐时段，检测第一触控物体的触控操作（S1）；在所述至少一个二类消隐时段，判断是否存在第二触控物体（S2）；根据判断结果，在与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，检测所述第一触控物体或/和所述第二触控物体的触控操作（S3）。还提供一种驱动器及触控显示装置。

Description

触控检测方法、驱动器及触控显示装置 技术领域
本发明涉及显示触控技术领域，尤其涉及一种触控检测方法及可实现该触控检测方法的驱动器及应用该驱动器的触控显示装置。
背景技术
越来越多的智能设备(如手机、平板)同时集成有显示与触控的功能，一种实现上述功能的方式为将智能设备的显示电极分时复用，也即分不同的工作时间段进行显示和触控。
现有的触控方式包括采用主动式触控物体进行触控的方式与采用被动式触控物体进行触控的方式，主动式触控物体例如为主动式触控笔，其可主动发射扫描信号，并在触控智能设备时，由智能设备接收并检测其发射的扫描信号。被动式触控物体例如为手指、被动笔，其无法发射扫描信号，手指在触控智能设备时，由智能设备发射扫描信号。因此，智能设备在检测上述两种物体的触控操作的方式是不同的，而对于可同时检测上述两种物体的触控操作的智能设备来讲，一种做法是，在每一工作周期中，分时检测主动式触控物体、检测被动式触控物体的触控操作、显示画面。但，上述方式存在的问题是，在所有的工作周期都进行两次触控检测(检测主动式触控物体、检测被动式触控物体)，则在无主动式触控物体的情况下，检测主动式触控物体的触控操作不利于节省智能设备的功耗。
发明内容
本发明一方面提供一种触控检测方法，应用于触控显示装置，其特征在于，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个 二类消隐时段及至少一个三类消隐时段；
所述触控检测方法包括：
在至少一个所述一类消隐时段，检测第一触控物体的触控操作；
在所述至少一个二类消隐时段，判断是否存在第二触控物体；以及
根据判断结果，在与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，检测所述第一触控物体或/和所述第二触控物体的触控操作。
本发明另一方面提供一种驱动器，所述驱动器应用于触控显示装置，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个二类消隐时段及至少一个三类消隐时段；
所述驱动器包括：
第一检测模块，用于在至少一个所述一类消隐时段，检测第一触控物体的触控操作；
判断模块，用于在所述至少一个二类消隐时段，判断是否存在第二触控物体；以及
第二检测模块，用于根据判断结果，在与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，检测所述第一触控物体或/和所述第二触控物体的触控操作。
本发明另一方面提供一种触控显示装置，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个二类消隐时段及至少一个三类消隐时段；所述触控显示装置包括：
触控显示模组；以及
驱动器，所述驱动器用于在至少一个所述一类消隐时段，驱动所述触控显示模组以检测第一触控物体的触控操作，并在所述至少一个二类消隐时段，驱动所述触控显示模组以判断是否存在第二触控物体，所述驱动器还用于根据判断结果，在与所述至少一个二类消隐时段属 于同一显示帧的至少部分所述三类消隐时段，驱动所述触控显示模组以检测所述第一触控物体或/和所述第二触控物体的触控操作；
在所述多个显示帧中除所述至少一个二类消隐时段及至少一个三类消隐时段之外的时段，所述驱动器驱动所述触控显示模组显示图像。
本发明实施例提供的触控检测方法，应用于触控显示装置，触控显示装置工作于多个显示帧，通过在各个显示帧之间配置一个一类消隐时段，并在每一显示帧中配置至少一个二类消隐时段及至少一个三类消隐时段，在至少一个该一类消隐时段检测第一触控物体的触控操作，根据二类消隐时段判断是否存在第二触控物体的判断结果，使得至少部分所述三类消隐时段用于检测所述第一触控物体或/和所述第二触控物体的触控操作，实现了触控显示装置可分时检测第一触控物体和第二触控物体的触控操作，并可根据实际情况(是否存在第二触控物体)，设置三类消隐时段的触控检测方式(检测所述第一触控物体或/和所述第二触控物体的触控操作)，有利于根据不同的情况合理设置触控显示装置的动作方式，节省触控显示装置的功耗。
附图说明
图1为本发明实施例一提供的触控显示装置的平面结构示意图。
图2为本发明实施例一提供的触控显示装置的立体结构示意图。
图3为本发明实施例一提供的一个工作周期内的触控检测方法的示意图。
图4为本发明实施例一提供的触控检测方法的流程示意图。
图5为本发明实施例一提供的另一个触控检测方法的示意图。
图6为本发明实施例二提供的一个工作周期内的触控检测方法的示意图。
图7为本发明实施例三提供的一个工作周期内的触控检测方法的示意图。
图8为本发明实施例四提供的一个工作周期内的触控检测方法的示意图。
图9本发明实施例五提供的触控显示装置的模块示意图。
主要元件符号说明
触控显示装置                 10、20
基板                         11
显示区                       111
非显示区                     112
栅极驱动器                   12
源极驱动器                   13
触控检测驱动器               14
栅极线                       G1～Gm
数据线                       D1～Dn
公共电极                     15
上玻璃基板                   16
偏光片                       17
保护盖板                     18
显示帧                       T display
显示子帧                     t display
一类消隐时段                 T1
第一子时段                   T11
第二子时段                   T12
二类消隐时段                 T2
三类消隐时段                 T3
工作周期                     T
步骤                         S1、S2、S3
触控显示模组                 21
驱动器                       22
第一检测模块                 221
判断模组                     222
第二触控模块                 223
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
实施例一
本实施例提供一种触控检测方法，其应用于触控显示装置，触控显示装置为例如电脑、平板、手机等同时具备显示与触控功能的智能装置。
请参阅图1，触控显示装置10包括基板11，本实施例中，基板11为薄膜晶体管(Thin-Film Transistor,TFT)基板。基板11上定义有显示区111及围绕显示区111设置的非显示区112，显示区111为触控显示装置10显示画面的区域，非显示区112则用于设置触控显示装置10的内部电子元器件(比如触控检测驱动器、显示驱动器)、走线等。触控显示装置10还包括设置于非显示区的栅极驱动器12、源极驱动器13及触控检测驱动器14，基板11上还设置有多个平行排列的栅极线G1～Gm以及多个平行排列的数据线D1～Dn，栅极线G1～Gm与数据线D1～Dn交叉设置。栅极驱动器12与栅极线G1～Gm电连接，在触控显示装置10进行画面显示时，栅极驱动器12以G1到Gm的顺序输出栅极扫描信号扫描各条栅极线。源极驱动器13与数据线D1～Dn电连接，并同时输出数据信号至各条数据线。栅极驱动器12与源极驱动器13以上述方式实现触控显示装置10的画面显示。
请继续参阅图1，触控显示装置10还包括多个形成在栅极线G1～Gm与数据线D1～Dn交叉围合的区域上的公共电极15，各个公共电极15呈阵列排布，且分别与触控检测驱动器14电连接。在触控显示装置10显示画面时，各个公共电极15均被施加公共电压。在触控显示装置10进行触控检测时，各个公共电极15用作触控电极，被施加触控扫描信号。
请参阅图2，本实施例中触控显示装置10还包括依序层叠设置的上玻璃基板16、偏光片17及保护盖板18。并且，基板11设置于上玻璃基板16远离保护盖板18的一侧，上述多个公共电极15设置于基板 11及上玻璃基板16之间。其中，保护盖板18上远离公共电极15的表面即为触控显示装置10接收触控操作的表面。
请参阅图3，触控显示装置10进行画面显示时，工作于多个显示帧T display，也即触控显示装置10显示动态画面时，该动态画面包括多帧图像，显示每一帧图像的时间段定义为一个显示帧T display，并且，请一并参阅图1与图3，一个显示帧T display也对应栅极驱动器12扫描完所有栅极线G1～Gm的时间。每相邻的两个显示帧T display之间具有一个一类消隐时段T1。
请继续一并参阅图1与图3，在栅极驱动器扫描栅极线G1～Gm时，将所有的栅极线G1～Gm分为若干组，每一组中的各条栅极线为连续排列。在扫描每相邻的两组栅极线之间，存在一时间间隔，将扫描完一组栅极线的时间定义为一显示子帧t display，将所述时间间隔定义为二类消隐时段T2或三类消隐时段T3。因此，每一个显示帧T display中包括多个显示子帧t display，每两个显示子帧t display之间具有一二类消隐时段T2或一三类消隐时段T3，每一个显示帧T display包括至少一个二类消隐时段T2及至少一个三类消隐时段T3。触控显示装置10分时进行画面显示与触控检测，具体的，触控显示装置10在各个显示子帧t display进行画面显示，并可在各个一类消隐时段T1、各个二类消隐时段T2及各个三类消隐时段T3进行触控检测。
触控显示装置10的触控检测功能支持检测第一触控物体(图未示)的触控操作及检测第二触控物体(图未示)的触控操作。其中，第一触控物体为无法主动发出触控扫描信号的物体，即，被动式触控物体，其在触摸触控显示装置10时，需要触控显示装置10主动发出触控扫描信号，第一触控物体例如为手指；第二触控物体可主动发出触控扫描信号并可接收触摸触控显示装置10发出的触控扫描信号，即，主动式触控物体，第二触控物体例如为主动式触控笔。
本实施例中，将每一个显示帧T display及该显示帧T display之前最邻近的一个一类消隐时段T1共同定义为一工作周期T。触控显示装置10在各个工作周期T的工作过程大致相同，本实施例中，以下将对触 控显示装置10在连续多个工作周期T中的工作过程进行详细阐述。
请参阅图4，本实施例提供的触控检测方法，包括：
步骤S1，在至少一个所述一类消隐时段，检测第一触控物体的触控操作；
步骤S2，在所述每个工作周期T中的至少一个二类消隐时段，判断是否存在第二触控物体；以及
步骤S3，根据判断结果，在每个工作周期T中与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，检测所述第一触控物体或/和所述第二触控物体的触控操作。
请再参阅图3，本实施例中，每一个显示帧T display包括9个显示子帧t display、1个二类消隐时段T2及7个三类消隐时段T3，其中，二类消隐时段T2在所有三类消隐时段T3之前出现，每一个二类消隐时段T2及每一个三类消隐时段T3皆位于两个相邻的显示子帧t display之间。
请同时参阅图1与图3，步骤S1中，在至少一个一类消隐时段T1，触控检测驱动器14输出触控扫描信号至各个公共电极15，以检测第一触控物体的触控操作。此时，在一类消隐时段T1，可以完整地检测一次第一触控物体的触控操作。由于本实施例提供的触控显示装置10无需在每一第一消隐时段T1皆检测第一触控物体的触控操作。在一个一类消隐时段T1时，若不检测第一触控物体的触控操作，则触控显示装置10在该时段空置，即触控显示装置10在该时段不进行任何操作。
步骤S2中，在每个工作周期T中的二类消隐时段T2时判断是否存在第二触控物体。
本实施例中，多个公共电极15呈阵列式排布，且上述多个公共电极15分时形成沿X方向排列的多行或沿Y方向排列的多列，每一行中相邻两个公共电极15相互电连接，每一列中相邻两个公共电极15相互电连接。
具体的，步骤S2中，上述多个公共电极形成沿着X方向排列的 多行，触控检测驱动器14输出触控扫描信号扫描各行公共电极15，以判断当前时刻是否存在第二触控物体。本实施例中，若要确定第二触控物体触控的具体坐标，需要先扫描各行公共电极15确定第二触控物体第一个维度的坐标，再扫描各列公共电极15确定第二触控物体的第二个维度的坐标，才可最终确定第二触控物体的具体坐标(当然于其他实施例中，也可以为先扫描各列公共电极15，再扫描各行公共电极15)。而步骤S2中，仅需要判断是否存在第二触控物体，并获取第一个维度的坐标，而无需确定第二触控物体的具体坐标，因此不需要做一次完整的触控检测，仅需选择扫描各行公共电极15或扫描各列公共电极15即可。
步骤S3中，根据步骤S2中的判断结果，决定每个工作周期T中与所述二类消隐时段T2属于同一显示帧T display的各个三类消隐时段T3的工作方式。
请继续同时参阅图1和图3，若步骤S2中判断为存在第二触控物体，则上述7个三类消隐时段T3皆用于检测第二触控物体的触控操作。由于确定第二触控物体的具体坐标需要扫描各行公共电极15，且扫描各列公共电极15，而一个三类消隐时段T3只能完成扫描各行公共电极15或扫描各列公共电极15，因此需要两个三类消隐时段T3共同完成一次检测第二触控物体的触控操作。其中，显示帧T display中第一个三类消隐时段T3与其邻近的二类消隐时段T2共同完成一次检测第二触控物体的触控操作，后续的6个三类消隐时段T3则两两分成三组，每组中的两个三类消隐时段T3相邻，每一组用于完成一次检测第二触控物体的触控操作。
因此可见，若步骤S1中第一消隐时段T1检测一次第一触控物体的触控操作，步骤S2判断存在第二触控物体时，一个工作周期T共检测一次第一触控物体的触控操作，并检测四次第二触控物体的触控操作，且完成一帧图像的显示。若触控显示装置10显示图像的频率为60Hz，根据上述的一个工作周期T中的工作过程，检测第一触控物体的触控操作的频率也为60Hz，而检测第二触控物体的触控操作的频率 为240Hz。本实施例中，第一触控物体为手指，第二触控物体为主动式触控笔，由于主动式触控笔的操作通常比手指的速度要快，因此要求对主动式触控笔的触控操作的检测频率高于对手指的触控操作的检测频率，以得到较好的触控体验。因此本实施例中，对第二触控物体的触控操作的检测频率(240Hz)为对第一触控物体的触控操作的检测频率(60Hz)的4倍，有利于提升触控体验。
进一步的，在当前工作周期T的二类消隐时段T2，通过扫描各行或各列公共电极15的方式，不仅可以判断是否存在第二触控物体，还可在存在第二触控物体的情况下，与相邻的一三类消隐时段T3共同完成检测一次第二触控物体的触控操作。也即二类消隐时段T2不仅用于判断是否存在第二触控物体，还用于作对第二触控物体的触控检测，有利于节省触控检测的总体时间。
再进一步的，每个工作周期T时间相同，同一工作周期T中，二类消隐时段T2与其最邻近的一三类消隐时段T3之间的时间间隔、各个相邻的三类消隐时段T3之间的时间间隔皆相同，因此每相邻两次检测第一触控物体的触控操作的时间间隔与每相邻两次检测第二触控物体的触控操作的时间间隔皆相同，也即触控显示装置10均匀地进行触控检测，用户体验更好。
请参阅图5，若步骤S2中判断为不存在第二触控物体，则上述7个三类消隐时段T3皆用于检测第一控物体的触控操作。本实施例中，假设需连续的四个三类消隐时段T3才能共同完成检测一次第一触控物体的触控操作，但是由于在一个工作周期T内仅有7个三类消隐时段T3，不够划分为两组以实现两次检测第一触控物体的触控操作。则本实施例中，将借用下一工作周期中的一类消隐时段T1的一部分时间用于与当前工作周期T中的最后三个三类消隐时段共同完成检测一次第一触控物体的触控操作，一类消隐时段T1剩余的时间则空置，不进行任何操作。
因此可见，若步骤S2判断为否，也即不存在第二触控物体时，仅需使用一个二类消隐时段T2用于判断是否存在第二触控物体，其 余的三类消隐时段T3可皆用于检测第一触控物体的触控操作。有利于避免不必要的时间浪费及不必要的功耗浪费，还有利于提高检测第一触控物体的频率，进而有利于优化用户的触控体验。
请再参阅图3，在本发明的一变更实施例中，若步骤S2判断为否，也即不存在第二触控物体时，无需在每个三类消隐时段T3皆检测第一触控物体的触控操作。在所述变更实施例中，相邻的3个三类消隐时段T3即可共同完成检测一次第一触控物体的触控操作，由于一个工作周期T中包括7个三类消隐时段，因此，可以进行两次第一触控物体的触控检测，并剩余一个三类消隐时段T3，无需借用下一工作周期T中的一类消隐时段T1的时长。在该剩余的三类消隐时段T3，触控显示装置10空置，也即触控显示装置10不进行任何操作。为了尽量保证检测第一触控物体的触控操作的均匀性，该空置的三类消隐时段T3可以选择为当前工作周期T中的第5个三类消隐时段T3。应当理解，该变更实施例中，共同完成检测一次第一触控物体的触控操作所需的三类消隐时段T3的个数并不用于限定本发明。于其他实施例中，共同完成检测一次第一触控物体的触控操作所需的三类消隐时段T3的个数根据实际需要进行设置。
上述变更实施例中，当判断不存在第二触控物体时，一个工作周期T中的三类消隐时段T3并未被全部用于检测第一触控物体的触控检测，在保证了检测第一触控物体触控操作的频率满足要求的基础上，通过设置部分三类消隐时段T3空置，有利于节省触控显示装置10的功耗。
于另一变更实施例中，上述的空置的部分三类消隐时段T3用于供触控显示装置进行防水侦测或/和噪声侦测，有利于提高触控显示装置触控检测的准确性。
实施例二
请参阅图6，本实施例提供的触控检测方法，与实施例一的区别主要在于，若步骤S2判断为是，也即存在第二触控物体时，无需在每个三类消隐时段T3皆检测第二触控物体的触控操作，而将部分三 类消隐时段T3用于检测第二触控物体的触控操作，部分三类消隐时段T3用于检测第一触控物体的触控操作。应当理解，一个三类消隐时段T3仅用于检测第一触控物体与第二触控物体其中一者的触控操作，不存在一个三类消隐时段T3既检测第一触控物体又检测第二触控物体的触控操作的情况。当然，本实施例中，部分三类消隐时段T3也可以被空置，触控显示装置10在空置状态下的三类消隐时段T3不作任何操作。
请继续参阅图6，本实施例中，一个工作周期T包括一一类消隐时段T1及在所述一类消隐时段T1后的一显示帧T display，一显示帧T display包括13个显示子帧t display、1个二类消隐时段T2及11个三类消隐时段T3，其中，该二类消隐时段T2位于11个三类消隐时段T3之前，每一二类消隐时段T2及每一三类消隐时段T3皆位于两个相邻的显示子帧t display之间。
步骤S2中，若在二类消隐时段T2判断不存在第二触控物体，则在后续的11个三类消隐时段皆用于检测第一触控物体的触控操作。具体的，假设相邻的6个三类消隐时段T3用于共同完成一次检测第一触控物体的触控操作，则需要12个三类消隐时段以完成两次检测第一触控物体的触控操作。本实施例中，由于当前显示帧T display中仅有11个三类消隐时段T3，则借用下一工作周期T中的一类消隐时段T1中的一段时长用于与当前显示帧T display中最后5个三类消隐时段T3共同完成一次触控检测，一类消隐时段T1剩余的时间则空置，不进行任何操作。
请继续参阅图6，步骤S2中，若在二类消隐时段T2判断存在第二触控物体，可设置后续11个三类消隐时段T3部分用于检测第一触控物体的触控操作，部分用于检测第二触控物体的触控操作。具体的，本实施例中，两个相邻的三类消隐时段T3共同完成检测一次第二触控物体的触控操作，其中，二类消隐时段T2与当前工作周期T中第一个三类消隐时段T3共同完成第二触控物体触控操作的第一次检测，第三个三类消隐时段T3及第四个三类消隐时段T3共同完成第二触控 物体触控操作的第二次检测，第六个三类消隐时段T3及第七个三类消隐时段T3共同完成第二触控物体触控操作的第三次检测，第九个三类消隐时段T3及第十个三类消隐时段T3共同完成第二触控物体触控操作的第四次检测，而当前工作周期T内的第二个三类消隐时段T3、第五个三类消隐时段T3及第十一个三类消隐时段T3各自单独检测一次第一触控物体的触控操作。因此，本实施例中，若在二类消隐时段T2判断存在第二触控物体，则在当前工作周期内检测四次第二触控物体的触控操作，并在第三类消隐时段T3检测二次第一触控物体的触控操作，若第一类消隐时段T1完成一次第一触控物体的触控操作，则共完成三次第一触控物体的触控操作。
可以理解的，于其他实施例中，上述11个三类消隐时段T3用于检测第一触控物体和第二触控物体的分配方式可不同，本实施例中的分配方式有利于提升触控检测的均匀性。
本实施例提供的触控检测方法，在实施例一的基础上，在二类消隐时段T2判断存在第二触控物体时，将后续的三类消隐时段T3的作动方式设置为一部分检测第一触控物体的触控操作，另一部分检测第二触控物体的触控操作，一方面有利于提高第二触控物体的检测频率的基础上，另一方面也有利于提高第一触控物体的检测频率。
实施例三
请参阅图7，本实施例提供的触控检测方法，与实施例一的主要区别在于，本实施例中，一个显示帧T display包括多个二类消隐时段T2。
请继续参阅图7，本实施例中，同一工作周期T中，多个二类消隐时段T2在至少一个三类消隐时段T3之前。每一二类消隐时段T2用于单独判断一次是否存在第二触控物体。本实施例中，每一个显示帧T display包括9个显示子帧t display、3个二类消隐时段T2及个5个三类消隐时段T3，每一个二类消隐时段T2及每一个三类消隐时段T3皆位于两个相邻的显示子帧t display之间。至少两个二类消隐时段T2判断存在第二触控物体时，才最终判断存在第二触控物体。
请继续参阅图7，本实施例中，若判断为存在第二触控物体，则 后续的5个三类消隐时段T3皆用于检测第二触控物体；若判断不存在第二触控物体的触控操作，则后续的5个三类消隐时段T3皆用于检测第一触控物体的触控操作。
由于主动式触控笔在触控显示装置10上操作、离开的两个状态不太可能频繁切换，因此上述方法步骤通过多次判断，在实施例一的基础上，有利于进一步提高触控检测的稳定性，防止噪声引起的误判。
实施例四
请参阅图8，本实施例提供的触控检测方法，与实施例三的区别主要在于，一个显示帧T display中包括的多个二类消隐时段T2并不连续，每两个相邻的二类消隐时段T2之间具有至少一个三类消隐时段T3，每一二类消隐时段T2用于判断一次是否存在第二触控物体，根据每一二类消隐时段T2的判断结果，在所述二类消隐时段T2与下一二类消隐时段T2之间的至少部分三类消隐时段T3检测第一触控物体或/和所述第二触控物体的触控操作。
本实施例中，每一个显示帧T display包括9个显示子帧、2个二类消隐时段T2及6个三类消隐时段T3，其中，第一个二类消隐时段T2紧跟在当前工作周期的一类消隐时段T1以后，第一个二类消隐时段与第二个二类消隐时段T2之间具有3个三类消隐时段，上述显示帧T display中，另外3个三类消隐时段在第二个二类消隐时段T2之后。
上述第一个二类消隐时段T2及第二个二类消隐时段T2分别单独进行一次判断。若在一二类消隐时段T2判断存在第二触控物体，则在二类消隐时段与下一二类消隐时段T2之间的至少部分三类消隐时段T3检测第二触控物体的触控操作；若在二类消隐时段T2判断不存在第二触控物体，则在二类消隐时段T2与下一二类消隐时段T2之间的至少部分三类消隐时段T3检测第一触控物体的触控操作。
在实际操作中，会存在第一个二类消隐时段T2对应时段没有第二触控物件的触控操作，而在第二个二类消隐时段T2对应的时段存在第二触控物件的触控操作的情况，因此，在实施例二的基础上，本实施例上述方法步骤通过将两个二类消隐时段T2分开设置，在一个 工作周期T进行两次判断，有利于在当前的工作周期T即可检测到第二触控物体，而无需等到下一个工作周期T再检测第二触控物体，有利于提高触控检测的效率。
并且应当理解的是，由于对第二触控物体的触控操作的检测精度比对第一触控物体的触控操作的检测精度的要求要高，因此，在前述所有实施例中，若在所述至少一个二类消隐时段T2判断存在第二触控物体，无论当前的显示帧T display中各个三类消隐时段T3如何分配(用于检测第一触控物体、用于检测第二触控物体、或处于空置状态等)，都应满足在当前的显示帧T display中，用于检测第二触控物体触控操作的总时长大于用于检测第一触控物体触控操作的总时长的条件。
实施例五
请参阅图9，本实施例提供的触控显示装置20，包括触控显示模组21及驱动器22。
本实施例中，触控显示模组21中的各个公共电极15在显示图像时被施加公共电压，而在触控显示装置20进行触控检测时，用作触控电极被施加触控扫描信号。驱动器22为一驱动芯片或为一驱动芯片中的一功能单元，也可为一驱动芯片组。于一实施例中，驱动器22为单个驱动芯片，其可作为如图1中所示的触控检测驱动器14，也可为集成如图1所示的栅极驱动器12、源极驱动器13及触控检测驱动器14的驱动芯片；于另一实施例中，驱动器22为一驱动芯片组，其包括如图1所示的相互独立的栅极驱动器12、源极驱动器13及触控检测驱动器14。
触控显示装置20工作于多个显示帧T display，每相邻的两个显示帧T display之间具有一一类消隐时段T1，每一个显示帧T display中包括多个显示子帧t display，每两个显示子帧t display之间具有一二类消隐时段T2或一三类消隐时段T3，每一个显示帧T display包括至少一个二类消隐时段T2及至少一个三类消隐时段T3。
请继续参阅图9，驱动器22包括：
第一检测模块221，用于在至少一个一类消隐时段T1，驱动触控显示模组21以检测第一触控物体的触控操作；
判断模块222，用于在所述至少一个二类消隐时段T2，驱动触控显示模组21以判断是否存在第二触控物体；以及
第二检测模块223，用于根据上述判断结果，在与所述至少一个二类消隐时段T2属于同一显示帧T display的至少部分所述三类消隐时段T3，驱动触控显示模组21以检测所述第一触控物体或/和所述第二触控物体的触控操作。并且，变更的实施例中，驱动器22还用于，在每一个显示子帧t display驱动触控显示模组21显示图像。
驱动器22及触控显示装置20的具体工作过程请参照实施例一～实施例四，应当理解，本实施例提供的驱动器22及触控显示装置20可实现如实施例一～实施例四中任一项所述的触控检测方法的步骤，可实现如上述实施例一～实施例四中所述的所有有益效果。
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本发明，而并非用作为对本发明的限定，只要在本发明的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本发明要求保护的范围之内。

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  1. 一种触控检测方法，应用于触控显示装置，其特征在于，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个二类消隐时段及至少一个三类消隐时段；
    所述触控检测方法包括：
    在至少一个所述一类消隐时段，检测第一触控物体的触控操作；
    在所述至少一个二类消隐时段，判断是否存在第二触控物体；以及
    根据判断结果，在与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，检测所述第一触控物体或/和所述第二触控物体的触控操作。
  2. 如权利要求1所述的触控检测方法，其特征在于，所述触控显示装置包括相互独立设置的多个公共电极；
    在所述至少一个二类消隐时段，所述多个公共电极形成沿第一方向排列的多行，每一行中相邻的两个公共电极相互电连接；所述在所述至少一个二类消隐时段，判断是否存在第二触控物体的步骤具体为：
    在所述至少一个二类消隐时段，扫描所述多行公共电极以判断是否存在第二触控物体。
  3. 如权利要求2所述的触控检测方法，其特征在于，在所述至少一个三类消隐时段，所述多个公共电极形成沿第二方向排列的多列，每一列中相邻的两个公共电极相互电连接；
    若在所述至少一二类消隐时段判断存在所述第二触控物体，则在所述二类消隐时段后的一三类消隐时段中，扫描所述多列公共电极，所述二类消隐时段与所述三类消隐时段共同完成一次对所述第二触控物体的触控操作的检测。
  4. 如权利要求1所述的触控检测方法，其特征在于，一个所述显示帧内包括多个二类消隐时段，所述多个二类消隐时段在所述至少一 个三类消隐时段之前；
    每一所述二类消隐时段用于判断一次是否存在所述第二触控物体，各个所述二类消隐时段皆判断存在所述第二触控物体时，最终判断存在所述第二触控物体。
  5. 如权利要求1～4任一项所述的触控检测方法，其特征在于，若判断存在所述第二触控物体，则在所述显示帧内的至少部分三类消隐时段检测所述第二触控物体的触控操作。
  6. 如权利要求1所述的触控检测方法，其特征在于，一个所述显示帧内包括多个二类消隐时段，每两个相邻的所述二类消隐时段之间具有至少一个所述三类消隐时段；
    每一所述二类消隐时段用于判断一次是否存在所述第二触控物体，根据每一所述二类消隐时段的判断结果，在所述二类消隐时段与下一二类消隐时段之间的至少部分三类消隐时段检测所述第一触控物体或/和所述第二触控物体的触控操作。
  7. 如权利要求6所述的触控检测方法，其特征在于，若在一二类消隐时段判断存在所述第二触控物体，则在所述二类消隐时段与下一二类消隐时段之间的至少部分三类消隐时段检测所述第二触控物体的触控操作。
  8. 如权利要求1所述的触控检测方法，其特征在于，若在所述至少一二类消隐时段判断存在所述第二触控物体，则在与所述至少一二类消隐时段同属于一显示帧的所述至少一三类消隐时段中，部分三类消隐时段检测所述第一触控物体的触控操作，部分三类消隐时段检测所述第二触控物体的触控操作；
    一个所述三类消隐时段仅用于检测所述第一触控物体与所述第二触控物体的其中一者的触控操作。
  9. 如权利要求1所述的触控检测方法，其特征在于，在一个所述显示帧中，若在所述至少一二类消隐时段判断存在所述第二触控物体，所述显示帧中检测所述第二触控物体的总时长大于检测所述第二触控物体的总时长。
  10. 如权利要求1所述的触控检测方法，其特征在于，所述第一触控物体用于接收所述触控显示装置发送的触控扫描信号，所述第二触控物体用于主动发送触控扫描信号至所述触控显示装置。
  11. 一种驱动器，其特征在于，所述驱动器应用于触控显示装置，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个二类消隐时段及至少一个三类消隐时段；
    所述驱动器包括：
    第一检测模块，用于在至少一个所述一类消隐时段，检测第一触控物体的触控操作；
    判断模块，用于在所述至少一个二类消隐时段，判断是否存在第二触控物体；以及
    第二检测模块，用于根据判断结果，在与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，检测所述第一触控物体或/和所述第二触控物体的触控操作。
  12. 一种触控显示装置，其特征在于，所述触控显示装置工作于多个显示帧，每相邻的两个所述显示帧之间具有一个一类消隐时段，每一所述显示帧中包括至少一个二类消隐时段及至少一个三类消隐时段；所述触控显示装置包括：
    触控显示模组；以及
    驱动器，所述驱动器用于在至少一个所述一类消隐时段，驱动所述触控显示模组以检测第一触控物体的触控操作，并在所述至少一个二类消隐时段，驱动所述触控显示模组以判断是否存在第二触控物体，所述驱动器还用于根据判断结果，在与所述至少一个二类消隐时段属于同一显示帧的至少部分所述三类消隐时段，驱动所述触控显示模组以检测所述第一触控物体或/和所述第二触控物体的触控操作；
    在所述多个显示帧中除所述至少一个二类消隐时段及至少一个三类消隐时段之外的时段，所述驱动器驱动所述触控显示模组显示图像。
PCT/CN2020/076832 2019-08-08 2020-02-26 触控检测方法、驱动器及触控显示装置 WO2021022804A1 (zh)

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