WO2020037869A1 - 电容屏的驱动系统、触摸屏和智能交互设备 - Google Patents

电容屏的驱动系统、触摸屏和智能交互设备 Download PDF

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WO2020037869A1
WO2020037869A1 PCT/CN2018/118237 CN2018118237W WO2020037869A1 WO 2020037869 A1 WO2020037869 A1 WO 2020037869A1 CN 2018118237 W CN2018118237 W CN 2018118237W WO 2020037869 A1 WO2020037869 A1 WO 2020037869A1
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Prior art keywords
capacitive screen
receiving
cables
driving
sets
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PCT/CN2018/118237
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English (en)
French (fr)
Inventor
刘天保
邬营杰
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广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Publication of WO2020037869A1 publication Critical patent/WO2020037869A1/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
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present application relates to the field of electronic equipment, and in particular, to a driving system for a capacitive screen, a touch screen, and an intelligent interactive device.
  • the capacitive screen includes TX (driving) and RX (receiving), which respectively represent the two stages of the capacitor.
  • a stable capacitor is formed between T and R.
  • FIG. 1 is a schematic diagram of a capacitive screen according to the prior art.
  • a current capacitive screen especially a large capacitive screen used in a conference scene, is generally set in two narrow ways of the capacitive screen.
  • the device TX on the side is the drive cable, and RX is set on the long side under the capacitive screen, that is, the receiver cable.
  • FIG. 2 is a schematic diagram of a capacitive screen according to the prior art.
  • two sets of TX are connected to a driving circuit
  • one set of RX is connected to a receiving circuit. Both the driving circuit and the receiving circuit are connected to the MCU.
  • the MCU is also connected to the CPU of the terminal through an interface such as USB or UART, so that the terminal knows the user's operation of the capacitive screen.
  • the circuit of the display screen is usually arranged on the lower long side. Since the output of the display screen is also arranged on the lower long side, the The outgoing line will be disturbed by the display circuit; (2) For the display with a long side, the signal in the center of the screen in the TX direction is weak; (3) The TX scan period is long, which results in a slow touch response of the capacitive screen; 4) The use of materials with lower impedance results in higher costs.
  • At least some embodiments of the present application provide a driving system for a capacitive screen, a touch screen, and an intelligent interactive device, so as to at least solve the technical problem of slow response speed of the capacitive screen in the prior art.
  • a driving system of a capacitive screen includes a receiving control circuit, a controller, and at least two driving control circuits, wherein the controller and the receiving control are respectively The circuit is connected to at least two driving control circuits.
  • the driving system of the capacitive screen further includes: multiple sets of driving cables, each of which is connected to at least two driving control circuits; receiving cables, receiving cables and receiving control circuits Connected.
  • the capacitive screen is rectangular, and multiple sets of driving cables are evenly disposed on the long side of the capacitive screen, and the receiving cables are evenly disposed on the narrow side of the capacitive screen.
  • multiple sets of drive cables are arranged on the long side below the capacitive screen.
  • At least two drive control circuits are two drive control circuits, and multiple sets of drive cables are two sets of drive cables.
  • the two sets of drive cables are respectively arranged on the long side of the lower side of the capacitive screen, and the left side and the lower side of the long side.
  • the receiving cable includes two sets of receiving cables, and the two receiving cables are respectively disposed on two narrow sides of the capacitive screen.
  • the receiving control circuit is a receiving control circuit, and two sets of receiving cables are connected to one receiving control circuit.
  • the receiving control circuit is two receiving control circuits, and the two sets of receiving cables are respectively connected to the two receiving control circuits.
  • a touch screen is further provided, including the driving system for the capacitive screen described above.
  • a smart interactive device including the touch screen described above.
  • At least two drive control circuits and multiple sets of drive cables are provided, and each set of drive cables is respectively connected to a corresponding drive control circuit, thereby achieving the purpose of increasing the driving speed and reducing
  • the time consumed by the driving, thereby increasing the response speed of the capacitive screen solves the technical problem of slow response speed of the capacitive screen in the prior art.
  • FIG. 1 is a schematic diagram of a capacitive screen according to the prior art
  • FIG. 2 is a schematic diagram of a capacitive screen according to the prior art
  • FIG. 3 is a schematic diagram of a driving system of a capacitive screen according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a capacitive screen according to the present application.
  • FIG. 5 is a schematic diagram of an optional driving system according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a driving system of a capacitive screen according to an embodiment of the present application.
  • the driving system of the capacitive screen includes a receiving control circuit and a control circuit. And the at least two driving control circuits, wherein the controller is respectively connected to the receiving control circuit and the at least two driving control circuits, as shown in FIG. 3, the driving system of the capacitive screen further includes:
  • the receiving cable is connected to the receiving control circuit.
  • the driving control circuit may be a driving circuit
  • the receiving control circuit may be a receiving circuit
  • At least two drive control circuits are drive control circuit 1 to drive control circuit n, and multiple sets of drive cables are TX1 to TXn, respectively.
  • Each set of driving cables TX is connected to the corresponding driving control circuit, RX is a receiving cable, and the receiving cable RX is connected to the receiving control circuit.
  • each set of drive cables can be driven independently and simultaneously. Therefore, the scanning time of each set of drive cables is reduced, the driving speed is improved, and the response speed of the capacitive screen is improved, which solves the technical problem of slow response speed of the capacitive screen in the prior art.
  • the capacitive screen is rectangular, and multiple sets of driving cables are evenly disposed on the long side of the capacitive screen, and the receiving cables are evenly disposed on the narrow side of the capacitive screen.
  • the drive cable is disposed on the two narrow sides of the capacitive screen, and its scanning period is relatively long.
  • multiple sets of drive cables are disposed on the long side of the capacitive screen.
  • the screen has x groups of driving cables arranged on the long side, and the scanning distance of each group of driving cables is only y / x, thereby shortening the scanning period of the driving cables and further improving the response speed of the capacitive screen.
  • the capacitive screen in this example is a rectangular capacitive screen, and multiple sets of driving cables TX are disposed on the long side of the bottom of the capacitive screen, and the receiving cables are disposed on the capacitive screen.
  • One of the narrow sides Because the length of the narrow side is short, only one RX can be used, and multiple sets of drive cables are set on the long side of the capacitive screen, so that each group of drive cables needs to be scanned in a shorter time, thereby reducing the capacitive screen The purpose of the response time.
  • the receiving cable is set on the short side of the capacitive screen, and the outgoing line of the display is on the lower long side, the receiving cable is not affected by the outgoing line of the display, which improves the receiving cable's susceptibility to display.
  • the problem of screen circuit interference reduces the requirements for capacitive screens on material impedance. Relatively high-impedance materials have a large cost reduction space.
  • a plurality of sets of driving cables are disposed on a long side below the capacitive screen.
  • At least two drive control circuits are two drive control circuits, and multiple sets of drive cables are two sets of drive cables.
  • FIG. 4 is a schematic diagram of a capacitive screen according to the present application.
  • two sets of driving cables RX are provided on the long side of the capacitive screen.
  • the ratio of the length to the short side of the capacitive screen includes various sizes such as 16: 9. If more sets of driving cables are set, more driving control circuits are required to increase the cost of the capacitive screen.
  • the solution provided by the above solution is For a capacitive screen of a normal size, it can improve the response speed and avoid increasing the cost. It is a preferred implementation mode, and the production cost of the capacitive screen is guaranteed under the condition that the response speed of the capacitive screen is increased.
  • the two sets of driving cables are respectively disposed on the left side of the capacitive screen with the center line on the left side and the bottom long side with the center line on the right side.
  • the dividing line in the capacitive screen in FIG. 4 is the middle line of the lower side, and a set of drive cables TX is set on the left and right of the center line, so that the two sets of drive cables can achieve the best responding speed.
  • the receiving cable includes two sets of receiving cables, and the two receiving cables are respectively disposed on two narrow sides of the capacitive screen.
  • a set of receiving cables is provided on each of the two narrow sides of the capacitive screen, so that the impedance distribution of the capacitive screen is uniform, and the driving signals and signals received by the receiving cables are more uniform.
  • the receiving control circuit is a receiving control circuit, and two sets of receiving cables are connected to one receiving control circuit.
  • FIG. 5 is a schematic diagram of an optional driving system according to an embodiment of the present application.
  • the capacitive screen is provided with a set of receiving banks on the left and right narrow sides respectively.
  • Line RX, and the two sets of receiving cables are connected to the same receiving circuit (ie, receiving control circuit).
  • one set of receiving control circuits is commonly used by the two sets of receiving cables, and the same receiving control circuit is used for receiving control.
  • the receiving control circuit is two receiving control circuits, and the two sets of receiving cables are respectively connected to the two receiving control circuits.
  • each set of receiving cables is controlled by a corresponding receiving control circuit.
  • the capacitive screen is divided into two parts, and the left half is divided by the left RX and The lower long center line detects the touch signal with the left TX, and the right half detects the touch signal with the right RX and the lower long center line with the right TX.
  • a touch screen includes the driving system of the capacitive screen described in the first embodiment.
  • a smart interactive device includes the touch screen described in the second embodiment.
  • the driving system, touch screen, and intelligent interactive device of the capacitive screen provided by at least some embodiments of the present application have the following beneficial effects: by setting at least two driving control circuits and multiple sets of driving cables, each group of driving cables They are respectively connected to corresponding drive control circuits, thereby achieving the purpose of increasing the driving speed, reducing the time consumed for driving, and thereby increasing the response speed of the capacitive screen, and solving the technical problem of slow response speed of the capacitive screen in the prior art.

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Abstract

一种电容屏的驱动系统、触摸屏和智能交互设备。其中，电容屏的驱动系统包括：接收控制电路、控制器（MCU）和至少两个驱动控制电路，其中，控制器（MCU）分别与接收控制电路和至少两个驱动控制电路相连，电容屏的驱动系统还包括：多组驱动排线（TX），多组驱动排线（TX）分别与至少两个驱动控制电路相连；接收排线（RX），接收排线（RX）与接收控制电路相连。解决了现有技术中电容屏响应速度较慢的技术问题。

Description

电容屏的驱动系统、触摸屏和智能交互设备
本申请要求于2018年8月21日提交中国专利局、申请号为201821350466.4、申请名称“电容屏的驱动系统、触摸屏和智能交互设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备领域，具体而言，涉及一种电容屏的驱动系统、触摸屏和智能交互设备。
背景技术
电容屏包括TX(驱动)和RX(接收)两部分，分别代表了电容的两级，T和R之间形成了一个稳定的电容，当手指触摸电容屏时，手指作为第三导体，又形成了一个电容，触摸屏的控制芯片即可以根据这个变化的电容值确定触摸的具体位置。
图1是根据现有技术的一种电容屏的示意图，结合图1所示，目前的电容屏，尤其是用于会议场景的大电容屏，通常的设置方式是，在电容屏的两个窄边上设备TX，即驱动排线，在电容屏下方的长边设置RX，即接收排线。图2是根据现有技术的一种电容屏的原理图，结合图2所示，两组TX连接至驱动电路，一组RX连接至接收电路，驱动电路和接收电路均与MCU相连，由MCU控制TX的时序，并根据接收电路返回的结果，确定触摸的位置，从而实现对触摸屏的控制。MCU还通过USB或UART等接口与终端的CPU相连，从而使得终端知晓用户对电容屏的操作。
对于现有技术中电容屏的上述结构，至少存在如下几个问题：(1)显示屏的电路通常设置于下方的长边，由于显示屏的出线也设置于下方的长边，因此接收电路的出线会受到显示屏电路的干扰；(2)对于长边较长的显示屏，TX方向的屏幕中心区域信号较弱；(3)TX扫描周期长，导致电容屏触控响应速度较慢；(4)需要使用阻抗较低的材料，导致成本较高。
针对现有技术中电容屏响应速度较慢的问题，目前尚未提出有效的解决方案。
申请内容
本申请至少部分实施例提供了一种电容屏的驱动系统、触摸屏和智能交互设备，以至少解决现有技术中电容屏响应速度较慢的技术问题。
根据本申请其中一实施例的一个方面，提供了一种电容屏的驱动系统，电容屏的 驱动系统包括：接收控制电路、控制器和至少两个驱动控制电路，其中，控制器分别与接收控制电路和至少两个驱动控制电路相连，电容屏的驱动系统还包括：多组驱动排线，多组驱动排线分别与至少两个驱动控制电路相连；接收排线，接收排线与接收控制电路相连。
可选的，电容屏为矩形，多组驱动排线均匀设置于电容屏的长边，接收排线均匀设置于电容屏的窄边。
可选的，多组驱动排线设置于电容屏下方的长边。
可选的，至少两个驱动控制电路为两个驱动控制电路，多组驱动排线为两组驱动排线。
可选的，两组驱动排线分别设置于电容屏下方长边的中线以左和下方长边的中线以右。
可选的，接收排线包括两组接收排线，两组接收排线分别设置于电容屏的两个窄边。
可选的，接收控制电路为一个接收控制电路，两组接收排线与一个接收控制电路相连。
可选的，接收控制电路为两个接收控制电路，两组接收排线分别与两个接收控制电路相连。
根据本申请其中一实施例的另一方面，还提供了一种触摸屏，包括上述的电容屏的驱动系统。
根据本申请其中一实施例的另一方面，还提供了一种智能交互设备，包括上述的触摸屏。
在本申请至少部分实施例中，通过设置至少两个驱动控制电路和多组驱动排线，且每组驱动排线都分别与对应的驱动控制电路相连，从而达到了提高驱动速度的目的，减少驱动所消耗的时间，进而提高电容屏的响应速度，解决了现有技术中电容屏响应速度较慢的技术问题。
附图说明
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1是根据现有技术的一种电容屏的示意图；
图2是根据现有技术的一种电容屏的原理图；
图3是根据本申请实施例的电容屏的驱动系统的示意图；
图4是根据本申请的一种电容屏的示意图；以及
图5是根据本申请实施例的一种可选的驱动系统的示意图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。
实施例1
根据本申请实施例，提供了一种电容屏的驱动系统的实施例，图3是根据本申请实施例的电容屏的驱动系统的示意图，所述电容屏的驱动系统包括：接收控制电路、控制器和至少两个驱动控制电路，其中，控制器分别与接收控制电路和至少两个驱动控制电路相连，如图3所示，该电容屏的驱动系统还包括：
多组驱动排线，多组驱动排线分别与至少两个驱动控制电路相连；
接收排线，接收排线与接收控制电路相连。
可选的，上述驱动控制电路可以为驱动电路，接收控制电路即可以为接收电路。
在一种可选的实施例中，结合图3所示的示例，在该示例中，至少两个驱动控制电路为驱动控制电路1至驱动控制电路n，多组驱动排线分别为TX1至TXn，每组驱动排线TX分别与对应的驱动控制电路相连，RX为接收排线，接收排线RX与接收控制电路相连。
在上述方案中，由于设置了至少两个驱动控制电路和多组驱动排线，且每组驱动排线都分别与对应的驱动控制电路相连，因此使得每组驱动排线都能够被独立同时驱动，从而减少每组驱动排线的扫描时间，提升驱动速度，进而提高电容屏的响应速度，解决了现有技术中电容屏响应速度较慢的技术问题。
可选的，根据本申请上述实施例，电容屏为矩形，多组驱动排线均匀设置于电容 屏的长边，接收排线均匀设置于电容屏的窄边。
现有技术中驱动排线设置于电容屏的两个窄边，其扫描周期较长，而上述方案将多组驱动排线设置于电容屏的长边，如果电容屏的长边为y，电容屏具有x组设置于长边上的驱动排线，则每组驱动排线的扫描距离仅为y/x，从而缩短了驱动排线的扫描周期，进而进一步的提高了电容屏的响应速度。
在一种可选的实施例中，仍结合图3所示，该示例中的电容屏为矩形电容屏，多组驱动排线TX设置于电容屏底部的长边，接收排线设置于电容屏的其中一个窄边。由于窄边的长度较短，因此使用一个RX即可，而电容屏的长边上设置有多组驱动排线，从而使得每组驱动排线需要扫描的时间较短，进而达到了缩短电容屏的响应时间的目的。
可选的，由于将接收排线设置在了电容屏的短边，而显示屏的出线在下方的长边，因此接收排线不会受到显示屏出线的影响，改善了接收排线易受显示屏电路干扰的问题，从而降低了电容屏对材料阻抗的要求，相对阻抗高的材料，成本有较大的下降空间。
可选的，根据本申请上述实施例，多组驱动排线设置于电容屏下方的长边。
可选的，根据本申请上述实施例，至少两个驱动控制电路为两个驱动控制电路，多组驱动排线为两组驱动排线。
在一种可选的实施例中，图4是根据本申请的一种电容屏的示意图，结合图4所示，电容屏的长边设置有两组驱动排线RX。
通常电容屏的长短边之比包括16:9等多种尺寸，如果设置较多组的驱动排线，则需要配套较多的驱动控制电路，使得电容屏成本增加，而上述方案提供的方案对于通常尺寸的电容屏来说，即能够提高响应速度，也避免了增加较多的成本，是一种优选的实施方式，在提高电容屏响应速度的情况下保证电容屏的制作成本。
可选的，根据本申请上述实施例，两组驱动排线分别设置于电容屏下方长边的中线以左和下方长边的中线以右。
仍结合图4所示，图4中的电容屏中的分割线即为下方边长的中线，中线左右各设置了一组驱动排线TX，从而使得两组驱动排线都能够达到最佳的响应速度。
可选的，根据本申请上述实施例，接收排线包括两组接收排线，两组接收排线分别设置于电容屏的两个窄边。
在上述方案中，电容屏的两个窄边各设置一组接收排线，从而使得电容屏的阻抗 分配均匀，进而使得驱动信号、和接收排线接收到的信号更均匀。
可选的，根据本申请上述实施例，接收控制电路为一个接收控制电路，两组接收排线与一个接收控制电路相连。
在一种可选的实施例中，图5是根据本申请实施例的一种可选的驱动系统的示意图，结合图5所示，电容屏在左右两个窄边分别设置了一组接收排线RX，且两组接收排线连接于同一个接收电路(即接收控制电路)。
在上述实施例中，两组接收排线共同使用一个接收控制电路，由同一个接收控制电路对其进行接收控制。
可选的，根据本申请上述实施例，接收控制电路为两个接收控制电路，两组接收排线分别与两个接收控制电路相连。
在上述实施例中，每组接收排线由一个对应的接收控制电路控制，将上述方案应用于图4的示例中，则该电容屏被分为两部分，左半部分由左侧的RX和下方长边中线以左的TX检测触摸信号，右半部分由右侧的RX和下方长边中线以右的TX检测触摸信号。
实施例2
根据本申请实施例，提供了一种触摸屏，触摸屏包括实施例1中所述的电容屏的驱动系统。
实施例3
根据本申请实施例，提供了一种智能交互设备，智能交互设备包括实施例2所述的触摸屏。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
在本申请的上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述仅是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。
工业实用性
如上所述，本申请至少部分实施例提供的电容屏的驱动系统、触摸屏和智能交互设备具有以下有益效果：通过设置至少两个驱动控制电路和多组驱动排线，且每组驱 动排线都分别与对应的驱动控制电路相连，从而达到了提高驱动速度的目的，减少驱动所消耗的时间，进而提高电容屏的响应速度，解决了现有技术中电容屏响应速度较慢的技术问题。

Claims (12)

  1. 一种电容屏的驱动系统，所述电容屏的驱动系统包括：接收控制电路、控制器和至少两个驱动控制电路，其中，所述控制器分别与所述接收控制电路和所述至少两个驱动控制电路相连，所述电容屏的驱动系统还包括：
    多组驱动排线，所述多组驱动排线分别与所述至少两个驱动控制电路相连；
    接收排线，所述接收排线与所述接收控制电路相连。
  2. 根据权利要求1所述的系统，其中，所述电容屏为矩形，所述多组驱动排线均匀设置于所述电容屏的长边，所述接收排线均匀设置于所述电容屏的窄边。
  3. 根据权利要求2所述的系统，其中，所述多组驱动排线设置于所述电容屏下方的长边。
  4. 根据权利要求2所述的系统，其中，所述至少两个驱动控制电路为两个驱动控制电路，所述多组驱动排线为两组驱动排线。
  5. 根据权利要求4所述的系统，其中，所述两组驱动排线分别设置于所述电容屏下方长边的中线以左和所述下方长边的中线以右。
  6. 根据权利要求4所述的系统，其中，所述接收排线包括两组接收排线，所述两组接收排线分别设置于所述电容屏的两个窄边。
  7. 根据权利要求6所述的系统，其中，所述接收控制电路为一个接收控制电路，所述两组接收排线与所述一个接收控制电路相连。
  8. 根据权利要求6所述的系统，其中，所述接收控制电路为两个接收控制电路，所述两组接收排线分别与所述两个接收控制电路相连。
  9. 一种触摸屏，所述触摸屏包括权利要求1至8中任意一项所述的电容屏的驱动系统。
  10. 一种智能交互设备，所述智能交互设备包括权利要求9所述的触摸屏。
  11. 根据权利要求5所述的系统，其中，所述接收排线包括两组接收排线，所述两组接收排线分别设置于所述电容屏的两个窄边。
  12. 根据权利要求1所述的系统，其中，电容屏的长短边之比包括16:9。
PCT/CN2018/118237 2018-08-21 2018-11-29 电容屏的驱动系统、触摸屏和智能交互设备 WO2020037869A1 (zh)

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