WO2019011013A1 - 触控电路、触控面板、显示面板和显示装置 - Google Patents

触控电路、触控面板、显示面板和显示装置 Download PDF

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Publication number
WO2019011013A1
WO2019011013A1 PCT/CN2018/081696 CN2018081696W WO2019011013A1 WO 2019011013 A1 WO2019011013 A1 WO 2019011013A1 CN 2018081696 W CN2018081696 W CN 2018081696W WO 2019011013 A1 WO2019011013 A1 WO 2019011013A1
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WIPO (PCT)
Prior art keywords
circuit
touch
voltage
output
electrically connected
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Application number
PCT/CN2018/081696
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English (en)
French (fr)
Inventor
曹学友
王海生
丁小梁
郑智仁
郭玉珍
韩艳玲
刘伟
王鹏鹏
张平
Original Assignee
京东方科技集团股份有限公司
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Priority to US16/303,961 priority Critical patent/US11281325B2/en
Publication of WO2019011013A1 publication Critical patent/WO2019011013A1/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
    • 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
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • G06F3/04144—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position using an array of force sensing means

Definitions

  • the present disclosure relates to a touch circuit, a touch panel including the touch circuit, a display panel including the touch circuit, a display device including the touch panel, and a display device including the display panel.
  • touch display devices already have a pressure sensing function, that is, different operations are performed according to the magnitude of the touch pressure.
  • these touch display devices with pressure sensing functions are generally used for the pressure sensing function.
  • the pressure sensing circuit is too complicated.
  • the present disclosure provides a touch control circuit, a touch panel including the touch control circuit, a display panel including the touch control circuit, a display device including the touch panel, and a Display device of the display panel.
  • a touch control circuit includes a first voltage input end, a pressure sensitive circuit, and an output circuit, the first voltage input end configured to input a first voltage signal, An input end of the pressure sensing circuit is electrically connected to the first voltage input end, an output end of the pressure sensing circuit is electrically connected to an input end of the output circuit, the pressure sensing circuit comprises a pressure sensitive resistor, and the output circuit
  • the control terminal is configured to receive a control signal, the output circuit configured to control an on state of the input and output of the output circuit in response to the control signal.
  • the pressure sensing circuit further includes a voltage dividing sub-circuit
  • the touch circuit further includes a second voltage input terminal, the second voltage input terminal configured to input a second voltage signal
  • the second The voltage signal is different from the first voltage signal
  • the first end of the voltage sensitive resistor is electrically connected to the first voltage signal input end
  • the second end of the pressure sensitive resistor and the first voltage divider circuit One end is electrically connected
  • the second end of the voltage sensitive resistor is further electrically connected to an output end of the pressure sensitive circuit
  • the second end of the voltage dividing sub-circuit is electrically connected to the second voltage input end.
  • the voltage divider subcircuit includes a fixed resistor.
  • the voltage dividing subcircuit includes a voltage dividing transistor and a voltage dividing control signal input terminal, the voltage dividing control signal input terminal is configured to input a voltage dividing control signal, and a gate and a gate of the voltage dividing transistor
  • the voltage dividing control signal input end is electrically connected
  • the first pole of the voltage dividing transistor is electrically connected to the second end of the voltage sensitive resistor
  • the second end of the voltage dividing transistor and the second voltage input terminal are electrically connected
  • the voltage dividing transistor is configured to turn on the first pole and the second pole of the voltage dividing transistor in response to the voltage dividing control signal received by the gate of the voltage dividing transistor.
  • the pressure sensing circuit further includes a voltage dividing sub-circuit and an amplifying transistor
  • the touch circuit further includes a second voltage input terminal
  • the second voltage input terminal is configured to input a second voltage signal
  • the second voltage signal is different from the first voltage signal
  • the first end of the pressure sensitive resistor is electrically connected to the first voltage signal input end
  • the second end of the pressure sensitive resistor and the voltage divider a first end of the circuit is electrically connected
  • a second end of the voltage sensitive resistor is further electrically connected to a gate of the amplifying transistor
  • a first end of the voltage dividing sub-circuit and a second end of the voltage sensitive resistor Electrically connecting
  • the second end of the voltage dividing sub-circuit is electrically connected to the second voltage input end
  • the first pole of the amplifying transistor is electrically connected to the first end of the pressure sensitive resistor
  • the amplifying transistor The second pole is electrically connected to the output of the pressure sensitive circuit.
  • the output circuit includes an output transistor, a gate of the output transistor is electrically coupled to a control terminal of the output circuit, and a first pole of the output transistor is electrically coupled to an input of the output circuit The second pole of the output transistor is coupled to the output of the output circuit.
  • a touch panel includes a plurality of touch scan lines and a plurality of touch output lines, the plurality of touch scan lines and the plurality of touch
  • the control output lines are interlaced to divide the touch panel into a plurality of touch units, and each of the touch units includes a touch circuit, wherein the touch circuit is the touch provided by the disclosed embodiment.
  • the control end of the output circuit of the touch circuit in the same row is electrically connected to the corresponding one of the touch scan lines, and the output end of the touch circuit in the same column is electrically connected to the corresponding touch output line.
  • the touch circuit includes a voltage dividing transistor
  • the touch panel further includes a plurality of voltage dividing control signal lines, and each row of the touch unit corresponds to one of the voltage dividing control signal lines, in the same row.
  • the gate of the voltage dividing transistor of the touch circuit is electrically connected to a corresponding one of the voltage dividing control signal lines.
  • a display device includes a touch panel, and the touch panel is a touch panel provided by the embodiment of the present disclosure, and the display device further includes an address circuit.
  • the input end of the addressing circuit is connected to the touch output line, and the addressing circuit is configured to determine the coordinates of the touch point and the touch applied to the touch point according to the signal output by the touch output line. Control the size of the pressure.
  • a display panel includes a plurality of pixel units, wherein at least a portion of the pixel units include a touch circuit, and the touch circuit is a touch provided by the disclosed embodiment
  • the control panel further includes a plurality of touch scan lines and a plurality of touch output lines, wherein the control end of the output circuit of the touch circuit in the same row is electrically connected to the corresponding one of the touch scan lines, in the same column The output end of the touch circuit is electrically connected to a corresponding one of the touch output lines.
  • a display device includes a display panel, wherein the display panel is a display panel provided by the disclosed embodiment, and the display device further includes an addressing circuit.
  • An input end of the addressing circuit is electrically connected to the touch output line, and the addressing circuit is configured to determine a coordinate of the touch point and a touch applied to the touch point according to the signal output by the touch output line Control the size of the pressure.
  • FIG. 1 is a schematic circuit diagram of a touch control circuit according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of an embodiment of a touch circuit provided by an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of another embodiment of a touch circuit provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of still another embodiment of a touch circuit provided by an embodiment of the present disclosure.
  • FIG. 5 is a circuit diagram of a touch panel including the touch circuit shown in FIG. 2;
  • FIG. 6 is a circuit diagram of a touch panel including the touch circuit shown in FIG. 3;
  • FIG. 7 is a circuit diagram of a touch panel including the touch circuit shown in FIG. 4;
  • FIG. 8 is a schematic circuit diagram of a display device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic circuit diagram of a display device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic circuit diagram of a display device according to an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a touch control circuit.
  • the touch control circuit includes a first voltage input terminal V1, a pressure sensitive circuit 110, and an output circuit 120.
  • the first voltage input terminal V1 is used to input the first voltage signal
  • the input end of the pressure sensing circuit 110 is electrically connected to the first voltage input terminal V1
  • the output end of the pressure sensing circuit 110 is electrically connected to the input end of the output circuit 120.
  • Circuit 110 includes a pressure sensitive resistor.
  • the control terminal of the output circuit 120 is configured to receive a control signal
  • the output circuit 120 is configured to control respective communication states (on or off) between the input end of the output circuit 120 and the output end of the output circuit 120 according to the control signal. .
  • the touch control circuit is applied to the touch panel.
  • the pressure sensitive circuit 110 can include a pressure sensitive resistor 111 , and the resistance value of the pressure sensitive resistor 111 in the pressure sensitive circuit 110 follows the touch pressure.
  • the change in the change causes the magnitude of the current flowing through the voltage sensing circuit 110 to change, so that the output of the output terminal of the pressure sensing circuit 110 changes.
  • the magnitude of the touch pressure can be determined by collecting the magnitude of the output of the output of the pressure sensitive circuit 110.
  • the touch control circuit is applied to the touch panel.
  • Each touch panel includes a plurality of touch circuits.
  • the position of the touch circuit can be determined by determining the output of the output of the pressure sensing circuit 110.
  • the position coordinates of the handle can be determined by determining the output of the output of the pressure sensing circuit 110. The position coordinates of the handle.
  • the position of the touch point and the magnitude of the applied touch pressure can be determined at the same time, so that the touch panel including the touch circuit can have a relatively simple structure.
  • the pressure sensitive resistor 111 can be fabricated from a QTC material.
  • the output circuit 120 can perform different responses according to different control signals.
  • the control signal may include a first control signal and a second control signal that are different from each other.
  • the input end of the output circuit 120 is controlled to be turned on, and when the control end of the output circuit 120 receives the second control signal, the input end of the output circuit 120 is controlled. Disconnected from the output.
  • the specific structure of the pressure sensitive circuit 110 can be variously changed.
  • the pressure sensitive circuit 110 includes points in addition to the pressure sensitive resistor 111.
  • the voltage circuit 112 further includes a second voltage input terminal V2.
  • the second voltage input terminal V2 is for inputting a second voltage signal, the second voltage signal being different from the first voltage signal.
  • the first end of the pressure sensitive resistor 111 can be electrically connected to the first voltage signal input terminal V1, and the second end of the pressure sensitive resistor 111 can be divided and divided.
  • the first end of the sub-circuit 112 is electrically connected, and the second end of the voltage-sensitive resistor 111 is also electrically connected to the output end of the pressure-sensitive circuit 110, and the second end of the voltage-dividing sub-circuit 112 is electrically connected to the second voltage input terminal V2.
  • the voltage sensing resistor 111 and the voltage dividing sub-circuit 112 form a voltage dividing circuit.
  • the output of the output terminal of the pressure sensing circuit 110 maintains a constant potential, and is subjected to touch pressure.
  • the resistance of the pressure sensitive resistor 111 changes (for example, becomes small), and the current flowing through the pressure sensitive resistor 111 changes accordingly, so that the voltage at the output end of the pressure sensitive circuit 110 changes.
  • the voltage dividing sub-circuit 112 it is also possible to avoid a short circuit caused by the resistance of the voltage sensitive resistor 111 being too small.
  • the specific structure of the partial voltage sub-circuit 112 is not limited.
  • the partial voltage sub-circuit 112 includes a fixed resistance.
  • the voltage of the first voltage signal input by the first voltage signal input terminal V1 is higher than the voltage of the second voltage signal input by the second voltage signal input terminal V2.
  • the voltage dividing sub-circuit 112 includes a voltage dividing transistor T2 and a voltage dividing control signal input terminal for inputting a voltage dividing control signal.
  • the gate of the voltage dividing transistor T3 is electrically connected to the input terminal of the voltage dividing control signal, and the first electrode of the voltage dividing transistor T2 is electrically connected to the second end of the voltage sensitive resistor 111, and the voltage dividing transistor T2 is connected. The second end is electrically connected to the second voltage input terminal V2.
  • the first pole and the second pole of the voltage dividing transistor T2 are controlled to be turned on according to the voltage dividing control signal received by the gate of the voltage dividing transistor T2, and the voltage dividing transistor T2 is operated in a saturation region. It should be noted that the voltage dividing transistor T2 operating in the saturation region is equivalent to a resistor having a fixed resistance.
  • the pressure sensing circuit 110 includes a pressure sensitive resistor 111, a voltage dividing sub-circuit 112, and an amplifying transistor T3.
  • the touch circuit further includes a second voltage input terminal V2.
  • the second voltage input terminal V2 is for inputting a second voltage signal, the second voltage signal being different from the first voltage signal.
  • the first end of the voltage sensitive resistor 111 is electrically connected to the first voltage signal input terminal V1
  • the second end of the voltage sensitive resistor 111 is electrically connected to the first end of the voltage dividing sub-circuit 112
  • the second end of the pressure sensitive resistor 111 is further It is electrically connected to the gate of the amplification transistor T3.
  • the first end of the voltage dividing sub-circuit 112 is electrically connected to the second end of the voltage sensitive resistor 111, and the second end of the voltage dividing sub-circuit 112 is electrically connected to the second voltage input terminal V2.
  • the first end of the amplifying transistor T3 is electrically connected to the first end of the pressure sensitive resistor 111, and the second end of the amplifying transistor T3 is electrically connected to the output end of the pressure sensitive circuit 110. As described above, the gate of the amplifying transistor T3 is electrically connected to the second end of the voltage sensitive resistor 111.
  • the current amplification transistor T3 operates in the enlarged area shown in Figure 4, the second amplifying transistor T3 of the amplifying transistor and the current I d I gs between the gate electrode and the first T3 satisfy the following formula (1):
  • the detected current through the output circuit 120 amplifies the current I d I ratio between the gate electrode and the first large-T3 transistor gs. It is easy to understand that the current I gs between the gate of the amplifying transistor T3 and the first pole is related to the resistance of the voltage-sensing resistor 111. Therefore, when the touch pressure is different, the resistance of the voltage-sensing resistor 111 changes, and the amplification is performed. The current I gs between the gate of the transistor T3 and the first pole also changes.
  • the current I gs between the gate of the amplifying transistor T3 and the first pole can be determined, and thus the magnitude of the touch pressure at the touch position can be determined. Since the current I d of the second pole of the amplifying transistor T3 is larger than the current I gs between the gate and the first pole of the amplifying transistor T3, it is also more easily detected, so that the detection result can be made more accurate, and thus Accurate execution of operator's operating instructions. In the embodiment shown in FIG. 4, for example, the voltage of the first voltage signal input by the first voltage signal input terminal V1 is smaller than the voltage of the second voltage signal input by the second voltage signal input terminal V2.
  • the resistance of the piezoresistor 111 is different, and therefore, the voltage at the second end of the piezoresistor 111 is also different.
  • the second pole of the amplifying transistor T3 is capable of outputting a different signal, thereby causing the output circuit 120 to output a different signal.
  • the voltage divider sub-circuit 112 includes a fixed resistor.
  • the voltage divider sub-circuit 112 can also be a transistor that operates in a saturation region.
  • the amplifying transistor T3 can be operated in the amplification region.
  • the specific structure of the output circuit 120 is not particularly limited.
  • the output circuit 120 includes an output transistor T1.
  • the gate of the output transistor T1 is electrically connected to the control terminal of the output circuit 120
  • the first pole of the output transistor T1 is electrically connected to the input terminal of the output circuit 120
  • the second pole of the output transistor T1 is The output of the output circuit 120 is connected.
  • the conduction state of the output transistor T1 is also different.
  • the gate of the output transistor T1 when the gate of the output transistor T1 receives the first control signal, the first pole and the second pole of the output transistor T1 are turned on, and when the gate of the output transistor T1 receives the second When the signal is controlled, the first pole and the second pole of the output transistor T1 are disconnected. At this time, one of the first control signal and the second control signal is a high level signal, and the other is a low level signal.
  • the output transistor T1 is an N-type transistor.
  • the voltage dividing transistor T2 is an N-type transistor.
  • the amplifying transistor T3 is also an N-type transistor.
  • an embodiment of the present disclosure provides a touch panel.
  • the touch panel includes a plurality of touch scan lines 200 and a plurality of touch output lines. 300.
  • the plurality of touch scan lines 200 and the plurality of touch output lines 300 are interlaced to divide the touch panel into a plurality of touch units, and each touch unit is provided with a touch circuit.
  • the circuit is the above touch circuit provided by the present disclosure.
  • the control end of the output circuit 120 of the touch circuit in the same row is electrically connected to the corresponding one of the touch scan lines 200, and the output end of the output circuit 120 of the touch circuit in the same column is electrically connected to the corresponding one of the touch output lines 300. connection.
  • a control signal can be provided to the touch scan line 200, and the conduction state of the input end and the output end of the output circuit 120 of the touch circuit of the same row can be controlled by the control signal.
  • control signal may include a first control signal and a second control signal.
  • first control signal When the first control signal is received on the touch scan line 200, the input end and the output end of the output circuit 120 of the touch circuit of the same row are both turned on. .
  • second control signal When the second control signal is received on the touch scan line 200, the input end and the output end of the output circuit 120 of the touch circuit of the same row are disconnected.
  • the resistance value of the pressure sensitive resistor 111 in the pressure sensing circuit 110 changes, so that the signal output by the touch circuit under the touch point is different from the touch outside the touch point.
  • the signal output by the circuit According to the output signal, the position of the touch point and the magnitude of the touch pressure can be determined.
  • the touch circuit provided by the present disclosure has a simple structure and can simultaneously determine the touch pressure and position of the touch point.
  • the touch circuit is the touch circuit shown in FIG. 2 .
  • the touch circuit is the touch circuit shown in FIG.
  • the touch panel further includes a plurality of voltage dividing control signal lines 400, each row of touch units corresponding to one voltage dividing control signal line 400, and the gate of the voltage dividing transistor T2 of the touch circuit in the same row.
  • the poles are electrically connected to a corresponding one of the control signal lines 400.
  • a voltage division control signal is supplied to the gates of the respective voltage dividing transistors T2 in one row through the divided voltage control signal line 400.
  • the touch circuit is the touch circuit shown in FIG.
  • an embodiment of the present disclosure provides a display device including a touch panel, the touch panel being the touch panel provided by the present disclosure, and correspondingly, the display
  • the device further includes an addressing circuit
  • FIGS. 8 to 10 illustrate schematic views of a display device including a touch panel according to the present disclosure, as shown in FIGS. 8 to 10, the input terminal of the addressing circuit and the touch
  • the control output line 300 is electrically connected.
  • the addressing circuit can determine the coordinates of the touch point and the touch pressure applied to the touch point according to the signal output by the touch output line 300.
  • the display device is an external display device, that is, the display device further includes a display panel, and the touch panel is attached to the display surface of the display panel.
  • an embodiment of the present disclosure provides a display panel, the display panel includes a plurality of pixel units, and at least a part of the pixel units are provided with a touch circuit, and the touch circuit is the disclosure.
  • the above touch circuit is provided.
  • the display panel further includes a plurality of touch scan lines 200 and a plurality of touch output lines 300.
  • the control end of the output circuit 120 of the touch circuit in the same row is electrically connected to the corresponding touch scan line 200, and is in the same column.
  • the output end of the output circuit 120 of the touch circuit is electrically connected to a corresponding one of the touch output lines 300.
  • the touch scan line 200 is disposed in parallel with the display scan line in the display panel
  • the touch output line 300 is disposed in parallel with the data line in the display panel.
  • an embodiment of the present disclosure provides a display device, which includes a display panel, and the display panel is a display panel provided by the embodiment of the present disclosure (refer to any of FIG. 5-7).
  • the display device further includes an addressing circuit, similar to that shown in FIGS. 8-10, the input end of the addressing circuit is electrically connected to the touch output line 300, and the addressing circuit can The coordinates of the touch point and the magnitude of the touch pressure applied to the touch point are determined according to the signal output by the touch output line 300.
  • the touch circuit may be formed while forming a pixel circuit.
  • a transistor in the pixel circuit may be multiplexed with a transistor in the touch circuit, or may be connected to the touch circuit.
  • the transistors in the same layer are formed at the same time, thereby saving process steps and saving cost, and the manufacturing process does not require specific requirements.
  • circuitry in the present disclosure may be implemented by software, hardware, or a combination thereof, for example, it may be implemented by a processor, an integrated circuit, or a combination thereof, and the present disclosure does not specifically require this.

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Abstract

本公开提供一种触控电路，所述触控电路包括第一电压输入端、第二电压输入端、压感电路和输出电路，所述第一电压输入端配置成输入第一电压信号，第二电压输入端配置成输入第二电压信号，第一电压信号不同于第二电压信号，所述压感电路的输入端与所述第一电压输入端电连接，所述压感电路的输出端与所述输出电路的输入端电连接，所述输出电路的控制端配置成接收控制信号，所述输出电路配置成响应于所述控制信号控制该输出电路的输入端与输出端的连接状态。本公开还提供一种触控面板、一种显示面板和一种显示装置。

Description

触控电路、触控面板、显示面板和显示装置
相关申请的交叉引用
本申请要求在2017年7月14日提交中国专利局、申请号为201710574042.X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
本公开涉及触控电路、包括触控电路的触控面板、包括触控电路的显示面板、包括触控面板的显示装置和包括显示面板的显示装置。
背景技术
目前，一些触控显示装置中已经具备了压感功能，即，根据触控压力的大小来执行不同的操作，但是，这些具有压感功能的触控显示装置中普遍存在用于压感功能的压感电路过于复杂的问题。
发明内容
本公开提供一种触控电路、一种包括该触控电路的触控面板、一种包括所述触控电路的显示面板、一种包括所述触控面板的显示装置和一种包括所述显示面板的显示装置。
作为本公开的一个方面，提供一种触控电路，所述触控电路包括第一电压输入端、压感电路和输出电路，所述第一电压输入端配置成输入第一电压信号，所述压感电路的输入端与所述第一电压输入端电连接，所述压感电路的输出端与所述输出电路的输入端电连接，所述压感电路包括压感电阻，所述输出电路的控制端配置成接收控制信号，所述输出电路配置成响应于所述控制信号控制该输出电路的输入端与输出端的联通状态。
在一些实施例中，所述压感电路还包括分压子电路，所述触控电路还包括第二电压输入端，所述第二电压输入端配置成输入第二电压信号，所述第二电压信号不同于所述第一电压信号，所述压感电阻的第一端与所述第一电压信号输入端电连接，所述压感电阻的第二端与所述分压子电路的第一端电连接，且所述压感电阻的第二端还与所述压感电路的输出端电连接，所述分压子电路的第二端与所述第二电压输入端电连接。
在一些实施例中，所述分压子电路包括固定电阻。
在一些实施例中，所述分压子电路包括分压晶体管和分压控制信号输入端，所述分压控制信号输入端配置成输入分压控制信号，所述分压晶体管的栅极与所述分压控制信号输入端电连接，所述分压晶体管的第一极与所述压感电阻的第二端电连接，所述分压晶体管的第二端与所述第二电压输入端电连接，所述分压晶体管配置成响应于所述分压晶体管的栅极接收到的所述分压控制信号，将所述分压晶体管的第一极和第二极导通。
在一些实施例中，所述压感电路还包括分压子电路和放大晶体管，所述触控电路还包括第二电压输入端，所述第二电压输入端配置成输入第二电压信号，所述第二电压信号不同于所述第一电压信号，所述压感电阻的第一端与所述第一电压信号输入端电连接，所述压感电阻的第二端与所述分压子电路的第一端电连接，且所述压感电阻的第二端还与所述放大晶体管的栅极电连接，所述分压子电路的第一端与所述压感电阻的第二端电连接，所述分压子电路的第二端与所述第二电压输入端电联连接，所述放大晶体管的第一极与所述压感电阻的第一端电连接，所述放大晶体管的第二极与所述压感电路的输出端电连接。
在一些实施例中，所述输出电路包括输出晶体管，所述输出晶体管的栅极与所述输出电路的控制端电连接，所述输出晶体管的第一极与所述输出电路的输入端电连接，所述输出晶体管的第二极与所述输出电路的输出端连接。
作为本公开的第二个方面，提供一种触控面板，所述触控面板 包括多条触控扫描线和多条触控输出线，所述多条触控扫描线和所述多条触控输出线互相交错将所述触控面板划分为多个触控单元，每个所述触控单元中均包括触控电路，其中，所述触控电路为本公开实施例所提供的触控电路，同一行中的触控电路的输出电路的控制端与相应的一条触控扫描线电连接，同一列中的触控电路的输出端与相应的一条触控输出线电连接。
在一些实施例中，所述触控电路包括分压晶体管，所述触控面板还包括多条分压控制信号线，每行触控单元对应一条所述分压控制信号线，同一行中的触控电路的分压晶体管的栅极与相应的一条分压控制信号线电连接。
作为本公开的第三个方面，提供一种显示装置，所述显示装置包括触控面板，所述触控面板为本公开实施例所提供的触控面板，所述显示装置还包括寻址电路，所述寻址电路的输入端与所述触控输出线连接，所述寻址电路配置成能够根据所述触控输出线输出的信号确定触控点的坐标以及施加在触控点的触控压力的大小。
作为本公开的第四个方面，提供一种显示面板，所述显示面板包括多个像素单元，其中，至少部分像素单元包括触控电路，所述触控电路为本公开实施例所提供的触控电路，所述显示面板还包括多条触控扫描线和多条触控输出线，同一行中的触控电路的输出电路的控制端与相应的一条触控扫描线电连接，同一列中的触控电路的输出端与相应的一条触控输出线电连接。
作为本公开的第五个方面，提供一种显示装置，所述显示装置包括显示面板，其中，所述显示面板为本公开实施例所提供的显示面板，所述显示装置还包括寻址电路，所述寻址电路的输入端与所述触控输出线电连接，所述寻址电路配置成能够根据所述触控输出线输出的信号确定触控点的坐标以及施加在触控点的触控压力的大小。
附图说明
附图是用来提供对本公开的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本公开，但并不构成对本 公开的限制。在附图中：
图1是本公开实施例所提供的触控电路的电路示意图；
图2是本公开实施例所提供的触控电路的一种实施方式的示意图；
图3是本公开实施例所提供的触控电路的另一种实施方式的示意图；
图4是本公开实施例所提供的触控电路的再一种实施方式的示意图；
图5是包括图2中所示的触控电路的触控面板的电路示意图；
图6是包括图3中所示的触控电路的触控面板的电路示意图；
图7是包括图4中所示的触控电路的触控面板的电路示意图；
图8是本公开实施例所提供的显示装置的电路示意图；
图9是本公开实施例所提供的显示装置的电路示意图；
图10是本公开实施例所提供的显示装置的电路示意图。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本公开，并不用于限制本公开。
作为本公开的一个方面，本公开的实施例提供一种触控电路，如图1所示，所述触控电路包括第一电压输入端V1、压感电路110和输出电路120。
第一电压输入端V1用于输入第一电压信号，压感电路110的输入端与第一电压输入端V1电连接，压感电路110的输出端与输出电路120的输入端电连接，压感电路110包括压感电阻。输出电路120的控制端用于接收控制信号，并且该输出电路120用于根据所述控制信号控制该输出电路120的输入端与该输出电路120的输出端的各自联通状态(导通或者断开)。
所述触控电路应用于触控面板中，如图2至图4所示，压感电路110可包括压感电阻111，压感电路110中的压感电阻111的阻值 随着触控压力的变化而变化，导致流过压感电路110的电流的电流值大小也随之变化，从而压感电路110的输出端的输出发生变化。通过采集压感电路110的输出端的输出的大小可以确定触控压力的大小。
如上文中所述，所述触控电路应用于触控面板中，每个触控面板包括多个触控电路，通过确定压感电路110的输出端的输出变化了的触控电路的位置可以确定触控点的位置坐标。
在所述触控电路中，可以同时确定触控点的位置以及施加的触控压力的大小，从而可以使得包括所述触控电路的触控面板具有较为简单的结构。
在本公开的一些实施例中，对压感电阻111的具体类型并不做特殊的要求，例如，可以利用QTC材料制成所述压感电阻111。
输出电路120可以根据不同的控制信号进行不同的响应。例如，控制信号可以包括互不相同的第一控制信号和第二控制信号。输出电路120的控制端接收到第一控制信号时，控制该输出电路120的输入端与输出端导通，输出电路120的控制端接收到第二控制信号时，控制该输出电路120的输入端与输出端断开。
在本公开的一些实施例中，压感电路110的具体结构可进行各种改变，例如，如图2至图4中所示，除了包括压感电阻111之外，压感电路110还包括分压子电路112，所述触控电路还包括第二电压输入端V2。
第二电压输入端V2用于输入第二电压信号，所述第二电压信号不同于所述第一电压信号。
在本公开的一些实施例中，如图2至图4所示，压感电阻111的第一端可与第一电压信号输入端V1电连接，压感电阻111的第二端可与分压子电路112的第一端电连接，且压感电阻111的第二端还与压感电路110的输出端电连接，分压子电路112的第二端与第二电压输入端V2电连接。
通过设置分压子电路112，压感电阻111与分压子电路112构成分压电路，在没有受到触控压力时，压感电路110的输出端的输出保持固定电位不变，当受到触控压力时，例如，压感电阻111的电阻发 生变化(例如，变小)，导致流过压感电阻111的电流随之变化，从而压感电路110的输出端的电压发生变化。此外，通过设置分压子电路112，还可以避免压感电阻111的电阻过小时造成短路。
在本公开的一些实施例中，对分压子电路112的具体结构并不做限定，例如，在图2中所示的本公开的触控电路的实施方式中，分压子电路112包括固定电阻。在一些实施方式中，例如，第一电压信号输入端V1输入的第一电压信号的电压高于第二电压信号输入端V2输入的第二电压信号的电压。
在本公开的一些实施例中，如图3所示，分压子电路112包括分压晶体管T2和分压控制信号输入端，该分压控制信号输入端用于输入分压控制信号。
如图3所示，分压晶体管T3的栅极与所述分压控制信号输入端电连接，分压晶体管T2的第一极与压感电阻111的第二端电连接，分压晶体管T2的第二端与第二电压输入端V2电连接。
根据分压晶体管T2的栅极接收到的所述分压控制信号，控制该分压晶体管T2的第一极与第二极导通，且使该分压晶体管T2工作在饱和区。需要指出的是，工作在饱和区的分压晶体管T2相当于一个阻值固定的电阻。
在本公开的一些实施例中，如图4所示，压感电路110包括压感电阻111、分压子电路112和放大晶体管T3，所述触控电路还包括第二电压输入端V2。
第二电压输入端V2用于输入第二电压信号，所述第二电压信号不同于所述第一电压信号。
压感电阻111的第一端与第一电压信号输入端V1电连接，压感电阻111的第二端与分压子电路112的第一端电连接，且压感电阻111的第二端还与放大晶体管T3的栅极电连接。
分压子电路112的第一端与压感电阻111的第二端电连接，分压子电路112的第二端与第二电压输入端V2电连接。
放大晶体管T3的第一极与压感电阻111的第一端电连接，放大晶体管T3的第二端与压感电路110的输出端电连接。如上文中所述， 放大晶体管T3的栅极与压感电阻111的第二端电连接。
该放大晶体管T3工作在放大区，如图4所示，放大晶体管T3的第二极的电流I d与放大晶体管T3的栅极和第一极之间的电流I gs满足以下公式(1)：
I d＝βI gs               (1)
在公式(1)中β＞1，由此可知，通过输出电路120检测到的电流I d比放大晶体管T3的栅极与第一极之间的电流I gs大。容易理解的是，放大晶体管T3的栅极与第一极之间的电流I gs与压感电阻111的阻值相关，因此，触控压力不同导致压感电阻111的阻值发生变化时，放大晶体管T3的栅极与第一极之间的电流I gs也会发生变化。通过检测放大晶体管T3的第二极的电流I d可以确定放大晶体管T3的栅极与第一极之间的电流I gs，进而可以确定触控位置处的触控压力的大小。由于放大晶体管T3的第二极的电流I d比放大晶体管T3的栅极与第一极之间的电流I gs大，因此，也更容易被检测到，从而可以使得检测结果更加准确，从而可以准确执行操作者的操作指令。在图4中所示的实施方式中，例如，第一电压信号输入端V1输入的第一电压信号的电压小于第二电压信号输入端V2输入的第二电压信号的电压。
容易理解的是，放大晶体管T3的第一极流向放大晶体管T3的栅极的电流与压感电阻111的大小相关联。
在不同的触控压力下，压感电阻111的阻值不同，因此，在压感电阻111的第二端的电压也随之不同。在不同的电压下，放大晶体管T3的第二极能够输出不同的信号，从而使得输出电路120输出不同的信号。
在本公开的一些实施例中，如图4所示，分压子电路112包括固定电阻。当然，分压子电路112也可以是工作在饱和区的晶体管。
需要指出的是，通过设置第一电压信号的大小、第二电压信号的大小、分压子电路112的阻值，可以使得放大晶体管T3工作在放大区。
在本公开的一些实施例中，对输出电路120的具体结构并不做 特殊的限定。如图2至图4中所示，输出电路120都包括输出晶体管T1。如图2至图4所示，输出晶体管T1的栅极与输出电路120的控制端电连接，输出晶体管T1的第一极与输出电路120的输入端电连接，输出晶体管T1的第二极与输出电路120的输出端连接。
输出晶体管T1的栅极接收到不同的控制信号时，该输出晶体管T1的导通状态也不同。
在本公开的一些实施例中，当输出晶体管T1的栅极接收到第一控制信号时，该输出晶体管T1的第一极与第二极导通，当输出晶体管T1的栅极接收到第二控制信号时，输出晶体管T1的第一极与第二极断开。此时，第一控制信号和第二控制信号中的一者为高电平信号，另一者为低电平信号。
在本公开的一些实施例中，对各个晶体管的具体类型并不做特殊的要求。例如，在图2至图4中，输出晶体管T1为N型晶体管。在图3中，分压晶体管T2为N型晶体管。在图4中，放大晶体管T3也为N型晶体管。
作为本公开的第二个方面，本公开的实施例提供一种触控面板，如图5至图7所示，所述触控面板包括多条触控扫描线200、多条触控输出线300，多条触控扫描线200和多条触控输出线300互相交错将所述触控面板划分为多个触控单元，每个触控单元中均设置有触控电路，所述触控电路为本公开所提供的上述触控电路。同一行中的触控电路的输出电路120的控制端与相应的一条触控扫描线200电连接，同一列中的触控电路的输出电路120的输出端与相应的一条触控输出线300电连接。
可以向触控扫描线200提供控制信号，可以通过控制信号控制同一行的触控电路的输出电路120的输入端与输出端的导通状态。
例如，控制信号可以包括第一控制信号和第二控制信号，当触控扫描线200上接收到第一控制信号时，同一行的触控电路的输出电路120的输入端与输出端都导通。当触控扫描线200上接收到第二控制信号时，同一行的触控电路的输出电路120的输入端与输出端都断开。
在触控点下方的触控电路中，压感电路110中的压感电阻111的阻值发生变化，从而导致触控点下方的触控电路输出的信号不同于触控点之外的触控电路输出的信号。根据输出的信号可以确定触控点的位置和触控压力的大小。
如上文中所述，本公开所提供的触控电路的结构简单，可以同时确定触控点的触控压力以及位置。
在图5所示的本公开实施例的触控面板，触控电路为图2中所示的触控电路。
在图6所示的本公开实施例的触控面板，触控电路为图3中所示的触控电路。如图6所示，所述触控面板还包括多条分压控制信号线400，每行触控单元对应一条分压控制信号线400，同一行中的触控电路的分压晶体管T2的栅极与相应的一条控制信号线400电连接。通过分压控制信号线400向一行中的各个分压晶体管T2的栅极提供分压控制信号。
在图7所示的本公开实施例的触控面板，触控电路为图4中所示的触控电路。
作为本公开的第三个方面，本公开的实施例提供一种显示装置，该显示装置包括触控面板，所述触控面板为本公开所提供的上述触控面板，相应地，所述显示装置还包括寻址电路，图8至图10示出了包括根据本公开的触控面板的显示装置的示意图，如图8至图10所示，所述寻址电路的输入端与所述触控输出线300电连接，所述寻址电路能够根据所述触控输出线300输出的信号确定触控点的坐标以及施加在触控点的触控压力的大小。
在本公开的一些实施例中，所述显示装置为外挂式的显示装置，即，所述显示装置还包括显示面板，触控面板贴合在显示面板的显示面上。
作为本公开的第四个方面，本公开的实施例提供一种显示面板，所述显示面板包括多个像素单元，至少部分像素单元中设置有触控电路，所述触控电路为本公开所提供的上述触控电路。所述显示面板还包括多条触控扫描线200和多条触控输出线300，同一行中的触控电 路的输出电路120的控制端与相应的一条触控扫描线200电连接，同一列中的触控电路的输出电路120的输出端与相应的一条触控输出线300电连接。
在一些实施例中，触控扫描线200与显示面板中的显示扫描线平行设置，触控输出线300与显示面板中的数据线平行设置。
作为本公开的第五个方面，本公开的实施例提供一种显示装置，所述显示装置包括显示面板，所述显示面板为本公开实施例所提供的显示面板(参考图5-7任一所示)，所述显示装置还包括寻址电路，与图8至图10所示的类似，所述寻址电路的输入端与所述触控输出线300电连接，所述寻址电路能够根据所述触控输出线300输出的信号确定触控点的坐标以及施加在触控点的触控压力的大小。
在一些实施例中，可以在形成像素电路的同时形成所述触控电路，例如，所述像素电路中的晶体管可以与所述触控电路中的晶体管复用，或者可以与所述触控电路中的晶体管同时同层形成，从而节省工艺步骤并节约成本，本公开中对制备工艺不做具体要求。
此外，本公开中的“电路”可以由软件、硬件或其结合实现，例如，其可以通过处理器、集成电路或其结合等实现，本公开对此不做具体要求。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而，本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (12)

  1. 一种触控电路，包括第一电压输入端、压感电路和输出电路，
    所述第一电压输入端配置成输入第一电压信号；
    所述压感电路的输入端与所述第一电压输入端电连接，所述压感电路的输出端与所述输出电路的输入端电连接，所述压感电路包括压感电阻；
    所述输出电路的控制端配置成接收控制信号，所述输出电路配置成响应于所述控制信号控制该输出电路的输入端与输出端的联通状态。
  2. 根据权利要求1所述的触控电路，其中，所述压感电路还包括分压子电路，所述触控电路还包括第二电压输入端，
    所述第二电压输入端配置成输入第二电压信号，所述第二电压信号不同于所述第一电压信号；
    所述压感电阻的第一端与所述第一电压信号输入端电连接，所述压感电阻的第二端与所述分压子电路的第一端电连接，且所述压感电阻的第二端还与所述压感电路的输出端电连接；
    所述分压子电路的第二端与所述第二电压输入端电连接。
  3. 根据权利要求2所述的触控电路，其中，所述分压子电路包括固定电阻。
  4. 根据权利要求2所述的触控电路，其中，所述分压子电路包括分压晶体管和分压控制信号输入端，
    所述分压控制信号输入端配置成输入分压控制信号；
    所述分压晶体管的栅极与所述分压控制信号输入端电连接，所述分压晶体管的第一极与所述压感电阻的第二端电连接，所述分压晶体管的第二端与所述第二电压输入端电连接，所述分压晶体管配置成响应于所述分压晶体管的栅极接收到的所述分压控制信号，将所述分 压晶体管的第一极与第二极导通。
  5. 根据权利要求1所述的触控电路，其中，所述压感电路还包括分压子电路和放大晶体管，所述触控电路还包括第二电压输入端，
    所述第二电压输入端配置成输入第二电压信号，所述第二电压信号不同于所述第一电压信号；
    所述压感电阻的第一端与所述第一电压信号输入端电连接，所述压感电阻的第二端与所述分压子电路的第一端电连接，且所述压感电阻的第二端还与所述放大晶体管的栅极电连接；
    所述分压子电路的第一端与所述压感电阻的第二端电连接，所述分压子电路的第二端与所述第二电压输入端电连接；
    所述放大晶体管的第一极与所述压感电阻的第一端电连接，所述放大晶体管的第二极与所述压感电路的输出端电连接。
  6. 根据权利要求5所述的触控电路，其中，所述分压子电路包括固定电阻。
  7. 根据权利要求1至6中任意一项所述的触控电路，其中，所述输出电路包括输出晶体管，所述输出晶体管的栅极与所述输出电路的控制端电连接，所述输出晶体管的第一极与所述输出电路的输入端电连接，所述输出晶体管的第二极与所述输出电路的输出端连接。
  8. 一种触控面板，包括多条触控扫描线和多条触控输出线，所述多条触控扫描线和所述多条触控输出线互相交错将所述触控面板划分为多个触控单元，每个所述触控单元均包括触控电路，其中，所述触控电路包括第一电压输入端、压感电路和输出电路，所述第一电压输入端配置成输入第一电压信号，所述压感电路的输入端与所述第一电压输入端电连接，所述压感电路的输出端与所述输出电路的输入端电连接，所述压感电路包括压感电阻，所述输出电路的控制端配置成接收控制信号，所述输出电路配置成响应于所述控制信号控制该输 出电路的输入端与输出端的连接状态，同一行中的触控电路的输出电路的控制端与相应的一条触控扫描线电连接，同一列中的触控电路的输出端与相应的一条触控输出线电连接。
  9. 根据权利要求8所述的触控面板，其中，所述压感电路还包括分压子电路，所述触控电路还包括第二电压输入端，所述第二电压输入端配置成输入第二电压信号，所述第二电压信号不同于所述第一电压信号，所述压感电阻的第一端与所述第一电压信号输入端电连接，所述压感电阻的第二端与所述分压子电路的第一端电连接，且所述压感电阻的第二端还与所述压感电路的输出端电连接，所述分压子电路的第二端与所述第二电压输入端电连接，
    所述分压子电路包括分压晶体管和分压控制信号输入端，所述分压控制信号输入端配置成输入分压控制信号，所述分压晶体管的栅极与所述分压控制信号输入端电连接，所述分压晶体管的第一极与所述压感电阻的第二端电连接，所述分压晶体管的第二端与所述第二电压输入端电连接，所述分压晶体管配置成响应于所述分压晶体管的栅极接收到的所述分压控制信号将所述分压晶体管的第一极与第二极导通，
    所述触控面板还包括多条分压控制信号线，每行触控单元对应一条所述分压控制信号线，同一行中的触控电路的分压晶体管的栅极与相应的一条分压控制信号线电连接。
  10. 一种显示装置，包括触控面板，其中，所述触控面板为根据权利要求8或9所述的触控面板，所述显示装置还包括寻址电路，所述寻址电路的输入端与所述触控输出线连接，所述寻址电路配置成根据所述触控输出线输出的信号确定触控点的坐标以及施加在触控点的触控压力的大小。
  11. 一种显示面板，包括多个像素单元，其中，至少部分像素单元包括触控电路，所述触控电路为根据权利要求1至7中任意一项 所述的触控电路，所述显示面板还包括多条触控扫描线和多条触控输出线，同一行中的触控电路的输出电路的控制端与相应的一条触控扫描线电连接，同一列中的触控电路的输出端与相应的一条触控输出线电连接。
  12. 一种显示装置，包括显示面板，其中，所述显示面板为根据权利要求11所述的显示面板，所述显示装置还包括寻址电路，所述寻址电路的输入端与所述触控输出线电连接，所述寻址电路配置成根据所述触控输出线输出的信号确定触控点的坐标以及施加在触控点的触控压力的大小。
PCT/CN2018/081696 2017-07-14 2018-04-03 触控电路、触控面板、显示面板和显示装置 WO2019011013A1 (zh)

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