WO2019052050A1 - 触摸显示系统 - Google Patents

触摸显示系统 Download PDF

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Publication number
WO2019052050A1
WO2019052050A1 PCT/CN2017/116305 CN2017116305W WO2019052050A1 WO 2019052050 A1 WO2019052050 A1 WO 2019052050A1 CN 2017116305 W CN2017116305 W CN 2017116305W WO 2019052050 A1 WO2019052050 A1 WO 2019052050A1
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WO
WIPO (PCT)
Prior art keywords
switch tube
power supply
switch
power
touch screen
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PCT/CN2017/116305
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English (en)
French (fr)
Inventor
母燕雄
Original Assignee
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 WO2019052050A1 publication Critical patent/WO2019052050A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive 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

Definitions

  • the utility model relates to the technical field of touch screens, in particular to a touch display system.
  • Infrared Touch Screen Technology consists of a touch screen and infrared transmitting and receiving sensing elements mounted on the outer frame of the touch screen.
  • the infrared emitting and receiving sensing elements form an infrared detecting net on the surface of the screen, and any touch object can change the contact.
  • Touch screen operation is achieved by infrared rays.
  • the capacitive screen works with the current sensing of the human body. The advantage of the infrared touch screen is that it is cheap and free from current, voltage and static interference, and is suitable for harsh environmental conditions.
  • the disadvantage is that the resolution is low, and the thickness of the whole machine is increased due to the increase of the outer frame.
  • the advantage of the capacitive screen is that the writing experience is smooth, the resolution is high, and the whole machine can be made thin, but the disadvantage of the capacitive screen is that it is easily disturbed by the interference of the external environment, resulting in inaccurate touch or inability to touch and write. For example, when the ambient temperature and humidity change, it will cause the capacitive screen to drift, resulting in inaccurate touch.
  • the drift of the capacitive screen is a technically insufficiency.
  • the environmental potential surface including the user's body) is farther away from the capacitive touch screen, but much larger than the finger area.
  • the signal sent by the touch screen causes interference, which makes the reference signal obtained by the touch screen unstable, resulting in abnormal operation of the touch screen after booting, for example, touch failure, performance degradation; and prone to random reporting, such as touch function disorder, automatic execution of non- Problems with normal operation of touch commands.
  • the object of the present invention is to provide a touch display system capable of avoiding the interference of the startup operation of the display screen during the booting process, so that the reference data acquired from the touch screen is more stable, thereby improving the stability of the operation of the touch screen system.
  • a touch display system for solving the above technical problem includes: a display screen, a touch screen, a host control unit, a power supply switch unit, and a touch screen control unit;
  • the host control unit has a first power input end, a display control end, a first communication end, and is configured to start timing when the power input has a current input, and output a power supply switch signal to supply power when the timing value reaches a timing threshold a power supply switch control end of the switch unit;
  • the power supply switch unit has a second power input end, a power output end, and a power switch control end;
  • the touch screen control unit has a third power input end, a touch control end, and a second communication end ;
  • the display control end is connected to the display screen, the power supply switch control end is connected to the power supply switch controlled end, and the first communication end is connected to the second communication end;
  • the power output end is connected to the third power input end, and the touch control end is connected to the touch screen.
  • the power supply switch unit includes a first switch tube, a first resistor, and a second switch tube;
  • the control end of the first switch tube is connected to the controlled end of the power supply switch, and is configured to turn on the first switch tube when receiving the power supply switch signal;
  • the input end of the first switch tube is configured to receive a current input to the host control unit through the first resistor when the first switch tube is turned on, and the output end of the first switch tube is grounded ;
  • the input end of the first switch tube is connected to the control end of the second switch tube, and is configured to provide a low level to the control end of the second switch tube when the first switch tube is turned on, so that The second switch tube is turned on;
  • the input end of the second switch tube is connected to the second power input end for receiving a current input, and the output end of the second switch tube is connected to the power output end for the second switch tube On time An output current is supplied to the power supply output.
  • the power supply switch unit further includes a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, and a second capacitor;
  • the second resistor is connected between the control end of the first switch tube and the controlled end of the power switch, and the third resistor is connected between the control end of the first switch tube and the ground; a fourth resistor is connected between the input end of the first switch tube and the control end of the second switch tube; the fifth resistor is connected between the controlled end of the power switch and the second power input end.
  • the first capacitor is connected between the control end of the second switch tube and the input end of the second switch tube; the second capacitor is connected to the control end of the second switch tube and the Between the outputs of the second switching tube.
  • connection between the first communication end and the second communication end is a USB connection.
  • the timing threshold is 30 seconds.
  • the touch screen is a capacitive touch screen.
  • the utility model provides a touch display system, comprising a display screen, a touch screen, a host control unit, a power supply switch unit and a touch screen control unit; wherein the host control unit controls the display screen to start working when receiving the power supply current, and starts timing and timing After the threshold is satisfied, the power supply switch unit is controlled to output the power supply current to the touch screen control unit, so that the touch screen control unit can control the touch screen operation, wherein the working process includes acquiring the reference data from the touch screen to calibrate the signals of the subsequently received touch screen.
  • the delay power-on operation of the touch screen can be realized, and the interference generated by the start of the display screen on the touch screen can be avoided, that is, the interference of the startup operation of the display screen can be avoided, so that the touch screen can be obtained.
  • the benchmark data obtained is more stable, which in turn improves the stability of the touch screen system.
  • FIG. 1 is a schematic structural view of an embodiment of a touch display system provided by the present invention.
  • FIG. 2 is a schematic structural view of an embodiment of a power supply switch unit of the touch display system provided by the present invention
  • FIG. 3 is a schematic structural view of another embodiment of a power supply switch unit of the touch display system provided by the present invention.
  • the touch display system provided by the present invention includes a host control unit 100, a power supply switch unit 102, and a touch screen control unit 103.
  • the host control unit 100 is configured to control the display screen 104 to start working when the power supply 101 is powered and input to the host control unit 100, and start timing, and generate a power supply switch signal when the timing value reaches the timing threshold, and output the The power switch signal is applied to the power supply switch unit 102.
  • the host control unit 100 controls the display screen 104, for example, the LCD starts up, that is, the backlight is activated.
  • the system displays the time from the start-up to the display 104 to enter the main interface for 38 seconds, and the present invention passes the time measurement of multiple times, the display screen 104 starts, the backlight switch control, the backlight illumination, and the like.
  • the duration of the display screen 104's start-up operation is 30 seconds, so it is preferable to set the above-described timing threshold to 30 seconds.
  • the power supply switch unit 102 is configured to output a current input to the host control unit 100 to the touch screen control unit 103 when receiving the power supply switch signal. As can be seen from the foregoing, the power supply switch unit 102 turns on the switch about 30 seconds after the power is turned on, so that the system power supply can supply power to the touch screen control unit 103, and the entire touch screen 105 starts to work.
  • the touch screen control unit 103 is configured to start the operation of the touch screen 105 when a power input is received, and establish a communication connection with the host control unit 100. Touch screen control unit 103 needs to be controlled
  • the main control unit is configured to transmit signals with the main control unit. Therefore, the touch screen control unit 103 needs to establish a communication connection with the host control unit 100.
  • the communication connection is preferably USB (Universal Serial Bus). Bus) connection.
  • the touch screen 105 is preferably a capacitive touch screen 105.
  • the host control unit 100 is further configured to: after detecting that the touch screen control unit 103 establishes a communication connection with the host control unit 100, generate a calibration signal, and output a calibration signal to the touch screen control unit 103 through the communication connection. .
  • the touch screen control unit 103 is configured to acquire reference data from the touch screen 105 when the calibration signal is received, to calibrate a signal received from the touch screen 105 according to the reference data.
  • the touch screen control unit includes a first touch screen control unit and a second touch screen control unit
  • the first touch screen control unit is configured to receive the calibration
  • the reference data is acquired from the first touch screen, so that the control unit of the first touch screen calibrates the touch signal received from the first touch screen according to the reference data
  • the second touch screen control unit uses When receiving the calibration signal, the reference data is acquired from the second touch screen, so that the control unit of the first touch screen calibrates the touch signal received by the second touch screen according to the reference data.
  • the touch screen control unit 103 establishes a communication connection with the host control unit 100, the subsequent execution of the reference data acquisition and calibration operations need not be changed, and only the time difference between the host control unit 100 and the capacitive screen is required to be separated. Further, the difference between the operation of the display screen 104 and the operation of the capacitive screen is adjusted, and the interference of the display 104 to the reference data acquisition is avoided.
  • FIG. 2 is a schematic structural diagram of an embodiment of a power supply switch unit of the touch display system provided by the present invention
  • the power supply switch unit 102 includes a first switch tube Q1, a first resistor R1 and a second switch tube Q2; it should be noted that the port of the power supply input to the host control unit 100 is the first power input terminal 5V-M;
  • the port that the host control unit 100 outputs the power supply switch signal to the power supply switch unit 102 is a power switch control end, and the power supply switch unit provides a connection with the power switch control end.
  • the port is a power supply switch controlled terminal CTL, which further includes a power output terminal 5V-TOUCH and a second power input terminal, and the connection relationship of the power supply switch unit 102 is as follows:
  • the control terminal of the first switch transistor Q1 is connected to the power supply switch control terminal CTL, and the input terminal of the first switch transistor Q1 is connected to the first power input terminal 5V-M through the first resistor R1; An output end of the first switch tube Q1 is grounded; an input end of the first switch tube Q1 is further connected to a control end of the second switch tube Q2, and an input end of the second switch tube Q2 is connected to the power supply.
  • the first power input terminal 5V-M is connected to the first power input terminal 5V-M, and the output terminal of the second switch transistor Q2 is connected to the power supply switch.
  • the power output of the unit is connected, that is, connected to the third power input terminal 5V-TOUCH of the touch screen control unit 103.
  • the first switch tube Q1 is an NPN type transistor
  • the control end of the first switch tube Q1 is a base of an NPN type transistor
  • the input end of the first switch tube Q1 is a collector of an NPN type transistor
  • the output end of the first switching transistor Q1 is an emitter of an NPN type triode.
  • the second switch tube Q2 is a P-type MOS tube
  • the control end of the second switch tube Q2 is a gate of a P-type MOS tube
  • the input end of the second switch tube Q2 is a P-type MOS tube.
  • the source, the output end of the second switching transistor Q2 is the drain of the P-type MOS transistor.
  • the signal transmission process of the power supply switch unit 102 is as follows:
  • the control end of the first switch tube Q1 receives the power supply switch signal, and when the power supply switch signal is received, turns on the first switch tube Q1; the input end of the first switch tube Q1 is in the When the first switch tube Q1 is turned on, the current input to the host control unit 100 is received by the first resistor R1, and the output end of the first switch tube Q1 is grounded; the first switch tube Q1 is The input end is connected to the control end of the second switch tube Q2, and when the first switch tube Q1 is turned on, providing a low level to the control end of the second switch tube Q2, so that the second switch tube Q2 is turned on; the input end of the second switch tube Q2 receives the current input to the host control unit 100, and the output end of the second switch tube Q2 outputs the power input when the second switch tube Q2 is turned on.
  • the current to the host control unit 100 is provided; thereby providing current to the touch screen control unit 103 to power up, causing the touch screen 105 to initiate operation.
  • FIG. 3 it is a schematic structural diagram of another embodiment of the power supply switch unit of the touch display system provided by the present invention.
  • the power supply switch unit 102 provided in this embodiment is on the previous power supply switch.
  • the element 102 further includes a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1 and a second capacitor C2;
  • the second resistor R2 is connected between the control end of the first switch tube Q1 and the power supply switch signal output terminal CTL, and the third resistor R3 is connected to the control end of the first switch tube Q1 and the ground.
  • the fourth resistor R4 is connected between the input end of the first switch tube Q1 and the control end of the second switch tube Q2;
  • the fifth resistor R5 is connected to the controlled end of the power switch CTL2 is connected between the first power input terminal 5V-M;
  • the first capacitor C1 is connected between the control end of the second switch tube Q2 and the input end of the second switch tube Q2;
  • the second capacitor C2 is connected between the control end of the second switch tube Q2 and the output end of the second switch tube Q2.
  • the second resistor R2 and the fourth resistor R4 are provided for current limiting, and the third resistor R3 is provided for providing a bias voltage to the first switching transistor Q1, and the first capacitor C1 and the second capacitor C2 are provided for Eliminate capacitive interference.
  • the touch display system provided by the embodiment of the present invention firstly controls the display screen to enter the power-on state and starts timing.
  • a power supply switch signal is provided to the power supply switch unit to enable the power supply switch unit.
  • the touch screen control unit can be powered on, control the touch screen to start work, thereby avoiding the interference during the booting process by controlling the working time difference between the display screen and the touch screen, so that the reference signal data obtained by the touch screen starting work is not booted.
  • the process interference improves the stability of the reference signal data, and further calibrates the signals received from the touch screen according to the reference signal data, thereby improving the stability of the operation of the touch display system.

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

本实用新型公开了一种触摸显示系统，包括：显示屏(104)、触摸屏(105)、主机控制单元(100)、供电开关单元(102)和触摸屏控制单元(103)；主机控制单元(100)具有第一电源输入端、显示控制端、第一通信端和用于在电源输入端具有电流输入时开始计时并在计时值在到计时阈值时输出供电开关信号给供电开关单元(102)的供电开关控制端；供电开关单元(102)具有第二电源输入端、电源输出端和供电开关受控端；触摸屏控制单元(103)具有第三电源输入端、触摸控制端和第二通信端；显示控制端与显示屏(104)连接，供电开关控制端与供电开关受控端连接，第一通信端与第二通信端连接；电源输出端与第三电源输入端连接，触摸控制端与触摸屏(105)连接。采用本实用新型，能够避开开机过程显示屏启动工作的干扰。

Description

触摸显示系统 技术领域
本实用新型涉及触摸屏技术领域，具体涉及一种触摸显示系统。
背景技术
目前常用的智能平板根据触控类型大致可分为红外屏智能平板及电容屏智能平板。红外屏(Infrared Touch Screen Technology)由触摸屏及装在触摸屏外框上的红外线发射与接收感测元件构成，红外线发射与接收感测元件在屏幕表面上形成红外线探测网，任何触摸物体可改变触点上的红外线而实现触摸屏操作。电容屏则是利用人体的电流感应进行工作的。红外触摸屏的优点是价格便宜，且不受电流、电压和静电干扰，适宜恶劣的环境条件，缺点是分辨率低，且由于增加了外框，导致整机厚度的增加。电容屏的优点是书写体验流畅，分辨率高，且能做到整机轻薄，但电容屏的缺点是容易受外界环境的干扰产生漂移，导致触摸不准或无法触摸书写。例如，当环境温度、湿度改变时，都会引起电容屏的漂移，造成触控不准确。电容屏的漂移原因属于技术上的先天不足，环境电势面(包括用户的身体)虽然与电容触摸屏离得较远，却比手指头面积大的多，这些因素都直接影响触摸位置的确定。
实用新型内容
本发明人在实施本实用新型时，发现在电容式交互智能平板、会议平板领域内，一般的触摸屏会通过USB连接到整机中，整机系统控制触摸屏进行到正常的显示工作，但是由于触摸屏的USB与整机建立USB连接之后，整机系统会马上进行到正常的工作状态中，不能在整机开机后对信号进行一次矫正，则在整机后续的工作过程中，由于背光开关控制、LCD启动、背光点亮等开机过程对 触摸屏发送的信号造成了干扰，使得触摸屏获取到的基准信号不稳定，导致开机后触摸屏工作异常，例如，触控失效，性能下降；以及易发生乱报点，例如触控功能错乱，自动执行非正常操作的触控指令等问题。
因而，本实用新型的目的是，提供一种触摸显示系统，能够避开开机过程显示屏启动工作的干扰，使从触摸屏中获取到的基准资料更稳定，进而提高触摸屏系统工作的稳定性。
为了解决上述技术问题一种触摸显示系统，包括：显示屏、触摸屏、主机控制单元、供电开关单元和触摸屏控制单元；
所述主机控制单元具有第一电源输入端、显示控制端、第一通信端和用于在所述电源输入端具有电流输入时开始计时并在计时值在到计时阈值时输出供电开关信号给供电开关单元的供电开关控制端；所述供电开关单元具有第二电源输入端、电源输出端和供电开关受控端；所述触摸屏控制单元具有第三电源输入端、触摸控制端和第二通信端；
所述显示控制端与所述显示屏连接，所述供电开关控制端与所述供电开关受控端连接，所述第一通信端与所述第二通信端连接；
所述电源输出端与所述第三电源输入端连接，所述触摸控制端与所述触摸屏连接。
进一步地，所述供电开关单元包括第一开关管、第一电阻和第二开关管；
所述第一开关管的控制端与所述供电开关受控端连接，用于在接收到所述供电开关信号时使所述第一开关管导通；
所述第一开关管的输入端用于在所述第一开关管导通时，通过所述第一电阻接收供电输入给所述主机控制单元的电流，所述第一开关管的输出端接地；
所述第一开关管的输入端与所述第二开关管的控制端连接，用于在所述第一开关管导通时，提供低电平给所述第二开关管的控制端，使所述第二开关管导通；
所述第二开关管的输入端与所述第二电源输入端连接，用于接收电流输入，所述第二开关管输出端与所述电源输出端连接，用于在所述第二开关管导通时 输出电流给所述电源输出端。
进一步地，所述供电开关单元还包括第二电阻、第三电阻、第四电阻、第五电阻、第一电容和第二电容；
所述第二电阻连接在所述第一开关管的控制端和所述供电开关受控端之间，所述第三电阻连接在所述第一开关管的控制端与地之间；所述第四电阻连接在所述第一开关管的输入端与所述第二开关管的控制端之间；所述第五电阻连接在所述供电开关受控端与所述第二电源输入端之间；所述第一电容连接在所述第二开关管的控制端与所述第二开关管的输入端之间；所述第二电容连接在所述第二开关管的控制端与所述第二开关管的输出端之间。
优选地，所述第一通信端与所述第二通信端的连接为USB连接。
优选地，所述计时阈值为30秒。
优选地，所述触摸屏为电容触摸屏。
相比于现有技术，本实用新型的有益效果在于：
本实用新型提供触摸显示系统，包括有显示屏、触摸屏、主机控制单元、供电开关单元和触摸屏控制单元；其中主机控制单元在接收到供电电流时，控制显示屏先启动工作，并开始计时，计时满足阈值之后，控制供电开关单元将供电电流输出给触摸屏控制单元，使得触摸屏控制单元可以控制触摸屏工作，其中，工作过程包括从触摸屏中获取基准资料来对后续接收到的触摸屏的信号进行校准。从而通过提供一个供电开关单元即可实现对触摸屏的延时上电工作，避开显示屏的启动对触摸屏产生的干扰，即，能够避开开机过程显示屏启动工作的干扰，使从触摸屏中获取到的基准资料更稳定，进而提高触摸屏系统工作的稳定性。
附图说明
图1是本实用新型提供的触摸显示系统的一个实施例的结构示意图；
图2是本实用新型提供的触摸显示系统的供电开关单元的一个实施例的结构示意图；
图3是本实用新型提供的触摸显示系统的供电开关单元的另一个实施例的结构示意图。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型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实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
请参阅图1，是本实用新型提供的触摸显示系统的一个实施例的结构示意图；本实用新型提供的一种触摸显示系统，包括：主机控制单元100、供电开关单元102和触摸屏控制单元103。
所述主机控制单元100，用于当检测到有电源101供电输入所述主机控制单元100时，控制显示屏104启动工作，并开始计时，在计时值达到计时阈值时生成供电开关信号，输出所述供电开关信号给所述供电开关单元102。其中，当供电输入所述主机控制单元100时，此时应当有系统的操作人按了电源键，给系统整机上电。那么，此时主机控制单元100控制显示屏104，例如LCD启动工作，即，背光启动。在本实用新型实施例中，系统从开机到显示屏104显示进入主界面的时长为38秒，而本实用新型人通过多次的时长测量，显示屏104启动、背光开关控制、背光点亮等显示屏104启动工作的过程所占据的时长为30秒，因而优选地设置上述计时阈值为30秒。
所述供电开关单元102，用于当接收到所述供电开关信号时，将供电输入所述主机控制单元100的电流输出给所述触摸屏控制单元103。从前述可知，开机约30秒左右供电开关单元102会打开开关，使系统供电能为触摸屏控制单元103供电，整个触摸屏105开始工作。
所述触摸屏控制单元103，用于当接收到供电输入时，启动触摸屏105工作，并与所述主机控制单元100建立通信连接。触摸屏控制单元103由于需要受控 制于主控制单元，与主控制单元进行信号之间的传递，因而触摸屏控制单元103需要先与主机控制单元100建立通信连接，其中，所述通信连接优选为USB(Universal Serial Bus，通用串行总线)连接。在本实用新型实施例中，所述触摸屏105优选为电容触摸屏105。
所述主机控制单元100，还用于在检测到所述触摸屏控制单元103与所述主机控制单元100建立通信连接后，生成校准信号，通过所述通信连接输出校准信号给所述触摸屏控制单元103。
所述触摸屏控制单元103，用于在接收到所述校准信号时，从所述触摸屏105中获取基准资料，以根据所述基准资料对从所述触摸屏105中接收到的信号进行校准。
进一步地，在所述触摸屏105包括有第一触摸屏和第二触摸屏时，则所述触摸屏控制单元包括第一触摸屏控制单元和第二触摸屏控制单元，第一触摸屏控制单元用于接收到所述校准信号时，从所述第一触摸屏中获取基准资料，以使所述第一触摸屏的控制单元根据所述基准资料对从所述第一触摸屏接收到的触摸信号进行校准；第二触摸屏控制单元用于接收到所述校准信号时，从所述第二触摸屏中获取基准资料，以使所述第一触摸屏的控制单元根据所述基准资料对所述第二触摸屏接收到的触摸信号进行校准。
需要说明的是，在触摸屏控制单元103与主机控制单元100建立通信连接之后，后续所执行基准资料获取和校准操作均无需作出更改，只需要隔开主机控制单元100与电容屏上电的时间差，进而调整显示屏104工作与电容屏工作的时间之差，避开显示屏104开机对基准资料获取的干扰。
如图2所示，是本实用新型提供的触摸显示系统的供电开关单元的一个实施例的结构示意图；
所述供电开关单元102包括第一开关管Q1、第一电阻R1和第二开关管Q2；需要说明的是，供电输入给所述主机控制单元100的端口为第一电源输入端5V-M；所述主机控制单元100输出所述供电开关信号给所述供电开关单元102的端口为供电开关控制端，所述供电开关单元提供的与该供电开关控制端对接 的端口为供电开关受控端CTL，其还包括有电源输出端5V-TOUCH和第二电源输入端，则所述供电开关单元102的连接关系如下：
所述第一开关管Q1的控制端与所述供电开关受控端CTL连接，所述第一开关管Q1输入端通过所述第一电阻R1与所述第一电源输入端5V-M连接；所述第一开关管Q1的输出端接地；所述第一开关管Q1的输入端还与所述第二开关管Q2的控制端连接，所述第二开关管Q2的输入端与所述供电开关单元的第电源输入端5V-M连接，且该第一电源输入端5V-M与所述第一电源输入端5V-M连接，所述第二开关管Q2的输出端与所述供电开关单元的电源输出端连接，即实现与触摸屏控制单元103的第三电源输入端5V-TOUCH连接。
优选地，所述第一开关管Q1为NPN型三极管，所述第一开关管Q1的控制端为NPN型三极管的基极，所述第一开关管Q1的输入端为NPN型三极管的集电极，所述第一开关管Q1的输出端为NPN型三极管的发射极。以及，所述第二开关管Q2为P型MOS管，所述第二开关管Q2的控制端为P型MOS管的栅极，所述第二开关管Q2的输入端为P型MOS管的源极，所述第二开关管Q2的输出端为P型MOS管的漏极。
所述供电开关单元102的信号传递过程如下：
所述第一开关管Q1的控制端接收所述供电开关信号，并在接收到所述供电开关信号时使所述第一开关管Q1导通；所述第一开关管Q1的输入端在所述第一开关管Q1导通时，通过所述第一电阻R1接收供电输入给所述主机控制单元100的电流，所述第一开关管Q1的输出端接地；所述第一开关管Q1的输入端与所述第二开关管Q2的控制端连接，在所述第一开关管Q1导通时，提供低电平给所述第二开关管Q2的控制端，使所述第二开关管Q2导通；所述第二开关管Q2的输入端接收供电输入给所述主机控制单元100的电流，所述第二开关管Q2输出端在所述第二开关管Q2导通时输出供电输入给所述主机控制单元100的电流；从而提供电流给触摸屏控制单元103上电，使得触摸屏105启动工作。
如图3所示，是本实用新型提供的触摸显示系统的供电开关单元的另一个实施例的结构示意图；本实施例提供的供电开关单元102在上一个供电开关单 元102的基础上，还包括第二电阻R2、第三电阻R3、第四电阻R4、第五电阻R5、第一电容C1和第二电容C2；
所述第二电阻R2连接在所述第一开关管Q1的控制端和所述供电开关信号输出端CTL之间，所述第三电阻R3连接在所述第一开关管Q1的控制端与地之间；所述第四电阻R4连接在所述第一开关管Q1的输入端与所述第二开关管Q2的控制端之间；所述第五电阻R5连接在所述供电开关受控端CTL2与所述第一电源输入端5V-M之间；所述第一电容C1连接在所述第二开关管Q2的控制端与所述第二开关管Q2的输入端之间；所述第二电容C2连接在所述第二开关管Q2的控制端与所述第二开关管Q2的输出端之间。
需要说明的是，设置第二电阻R2和第四电阻R4是为了限流，设置第三电阻R3是为了提供偏置电压给第一开关管Q1，设置第一电容C1和第二电容C2是为了排除电容干扰。
实施本实用新型实施例，具有如下有益效果：
本实用新型实施例提供的一种触摸显示系统，首先主控制单元正常控制显示屏进入开机状态，并开始计时，当达到计时阈值时，再提供一个供电开关信号给供电开关单元，让供电开关单元导通，使得触摸屏控制单元能够上电，控制触摸屏启动工作，从而通过控制显示屏与触摸屏之间的工作时间差来避开开机过程中的干扰，使得触摸屏启动工作所获得的基准信号资料不受开机过程干扰，提高了基准信号资料的稳定性，进而在根据基准信号资料对从所述触摸屏中接收到的信号所进行的校准更为准确，提高了触摸显示系统工作的稳定性。
以上所述是本实用新型的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本实用新型原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本实用新型的保护范围。

Claims (6)

  1. 一种触摸显示系统，其特征在于，包括：显示屏、触摸屏、主机控制单元、供电开关单元和触摸屏控制单元；
    所述主机控制单元具有第一电源输入端、显示控制端、第一通信端和用于在所述电源输入端具有电流输入时开始计时并在计时值在到计时阈值时输出供电开关信号给供电开关单元的供电开关控制端；所述供电开关单元具有第二电源输入端、电源输出端和供电开关受控端；所述触摸屏控制单元具有第三电源输入端、触摸控制端和第二通信端；
    所述显示控制端与所述显示屏连接，所述供电开关控制端与所述供电开关受控端连接，所述第一通信端与所述第二通信端连接；
    所述电源输出端与所述第三电源输入端连接，所述触摸控制端与所述触摸屏连接。
  2. 如权利要求1所述的触摸显示系统，其特征在于，所述供电开关单元包括第一开关管、第一电阻和第二开关管；
    所述第一开关管的控制端与所述供电开关受控端连接，用于在接收到所述供电开关信号时使所述第一开关管导通；
    所述第一开关管的输入端用于在所述第一开关管导通时，通过所述第一电阻接收供电输入给所述主机控制单元的电流，所述第一开关管的输出端接地；
    所述第一开关管的输入端与所述第二开关管的控制端连接，用于在所述第一开关管导通时，提供低电平给所述第二开关管的控制端，使所述第二开关管导通；
    所述第二开关管的输入端与所述第二电源输入端连接，用于接收电流输入，所述第二开关管输出端与所述电源输出端连接，用于在所述第二开关管导通时输出电流给所述电源输出端。
  3. 如权利要求2所述的触摸显示系统，其特征在于，所述供电开关单元还包括第二电阻、第三电阻、第四电阻、第五电阻、第一电容和第二电容；
    所述第二电阻连接在所述第一开关管的控制端和所述供电开关受控端之间，所述第三电阻连接在所述第一开关管的控制端与地之间；所述第四电阻连接在所述第一开关管的输入端与所述第二开关管的控制端之间；所述第五电阻连接在所述供电开关受控端与所述第二电源输入端之间；所述第一电容连接在所述第二开关管的控制端与所述第二开关管的输入端之间；所述第二电容连接在所述第二开关管的控制端与所述第二开关管的输出端之间。
  4. 如权利要求1所述的触摸显示系统，其特征在于，所述第一通信端与所述第二通信端的连接为USB连接。
  5. 如权利要求1所述的触摸显示系统，其特征在于，所述计时阈值为30秒。
  6. 如权利要求1所述的触摸显示系统，其特征在于，所述触摸屏为电容触摸屏。
PCT/CN2017/116305 2017-09-13 2017-12-15 触摸显示系统 WO2019052050A1 (zh)

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