Touch control circuit, touch control device and electronic equipment

Abstract

A touch circuit, a touch device and an electronic device, the touch circuit comprises a controller, a touch detection module and a pressure detection module, the touch detection module is electrically connected with the controller, the touch detection module is used for inputting at least one touch signal to the controller, and the pressure detection module is electrically connected with the controller. The pressure detection module is used for inputting a pressure signal to the controller, and the controller is used for outputting a control signal according to the touch signal and the pressure signal, so that the touch circuit can output the control signal only when a person touches and applies pressure to the pressure detection module; the touch control circuit does not output a control signal when touching foreign matters such as liquid, dust, a ring and a key or the skin slightly, so that the risk of mistaken touch caused by non-manual operation is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to touch circuit technical field, concretely relates to a touch circuit, touch device and electronic equipment. BACKGROUND

[0002] In modern society, touch circuit and pressure sensing circuit have become an indispensable part in many electronic devices. Provide intuitive, convenient interactive experience for users. The touch electrode of the touch device usually judges whether it is touched according to the detection principle of capacitance change. In the prior art, when the touch electrode contacts liquid, dust, ring and key and other foreign matters or skin light touch, capacitance change will also occur, which will cause false touch. UTILITY MODEL CONTENT

[0003] The utility model discloses a touch circuit, touch device and electronic equipment, solve the problem that in prior art, when the touch electrode contacts liquid, dust, ring and key and other foreign matters or skin light touch, capacitance change will also occur, which will cause false touch.

[0004] To achieve the purpose of the utility model, the utility model provides the following technical scheme:

[0005] Firstly, the utility model provides a touch circuit, comprising: a controller;Touch detection module, with the controller electricity is connected, the touch detection module is used to input at least one touch signal to the controller;Pressure detection module, with the controller electricity is connected, and the pressure detection module is used to input pressure signal to the controller;Wherein, the controller is used to output control signal according to the touch signal and the pressure signal.

[0006] In one embodiment, the touch detection module includes a touch chip and a plurality of touch electrodes, and the plurality of touch electrodes are electrically connected to the touch chip, and the touch chip is electrically connected to the controller.

[0007] In one embodiment, the touch chip includes a plurality of first input terminals and a plurality of first output terminals, the controller includes a plurality of second input terminals, the plurality of first input terminals correspond one-to-one to the plurality of first output terminals, the plurality of first input terminals correspond one-to-one to the plurality of touch electrodes and are electrically connected, and the plurality of first output terminals correspond one-to-one to the plurality of second input terminals and are electrically connected.

[0008] In one embodiment, the touch circuit further includes a first power supply and a first capacitor, one end of the first capacitor is electrically connected to the first power supply and also electrically connected to the touch chip, and the other end of the first capacitor is electrically connected to a power supply ground.

[0009] In one embodiment, the touch control circuit further comprises a second power supply, the second power supply is electrically connected with the controller and the pressure detection module.

[0010] In one embodiment, the pressure detection module comprises a pressure sensor and an inductor, the pressure sensor is electrically connected with the second power supply, and the inductor is connected with the pressure sensor and the controller.

[0011] In one embodiment, the pressure detection module further comprises a first resistor, the first resistor is connected with the pressure sensor and the inductor.

[0012] In one embodiment, the pressure detection module further comprises a second resistor and a second capacitor, the second resistor is connected with the second capacitor in parallel, and the second resistor is electrically connected between the first resistor and the inductor.

[0013] In a second aspect, the utility model also provides a touch control device, including the touch control circuit of any one of the implementation of the first aspect.

[0014] In a third aspect, the utility model also provides an electronic device, including a function module and the touch control device of the second aspect, the function module is electrically connected with the controller, and the controller is used for inputting the control signal to the function module.

[0015] By arranging the controller, the touch detection module and the pressure detection module, the touch detection module and the pressure detection module are electrically connected with the controller, and the controller is used for outputting the control signal according to at least one touch signal output by the touch detection module and the pressure signal of the pressure detection module, so that the touch control circuit only outputs the control signal when human touch and pressure are applied to the pressure detection module, the touch control circuit does not output the control signal when contacting liquid, dust, ring and key and other foreign matters or skin light touch, and the risk of false touch caused by non-human operation is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and obviously, the drawings in the following description can only be some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0017] Figure 1 It is a circuit diagram of the touch control circuit of one embodiment;

[0018] Figure 2 It is a work flow diagram of the touch control circuit of one embodiment.

[0019] BRIEF DESCRIPTION OF DRAWINGS

[0020] 100 - touch circuit

[0021] MCU - controller, IN21…IN2 n - second input, IN3 - third input, OUT2 - second output, VDD2 - second positive power supply interface, GND - second negative power supply interface

[0022] 10 - touch detection module, IC - touch chip, IN11…IN1 n - first input, OUT11…OUT1 n - first output, VDD1 - first positive power supply interface, VSS - first negative power supply interface, TP1…TP n - touch electrode

[0023] 20 - pressure detection module, P - pressure sensor, L - inductor, R1 - first resistor, R2 - second resistor, C2 - second capacitor

[0024] V1 - first power supply, C1 - first capacitor, V2 - second power supply, W - functional module DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "electrically connected" to another component, it can be directly electrically connected to the other component or there can be intervening components.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for describing the specific embodiments only and is not intended to be limiting. The use of the terms "and / or" includes a combination of one or more of the associated listed items.

[0028] Some embodiments of the present application will be described in detail below with reference to the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] Please refer to Figure 1 The utility model provides a kind of electronic equipment (not shown), including functional module W and the touch control device (not shown) in the utility model embodiment, functional module W is electrically connected with controller MCU, and controller MCU is used to input control signal to functional module W.

[0030] Optionally, the electronic equipment can be kitchen household appliances with touch panel or touch key, including refrigerator, microwave oven, electromagnetic oven and oven, etc., without limitation. Optionally, the electronic equipment can also be electronic equipment with touch screen, including electronic book, tablet computer and smart phone, electronic cigarette, smart watch, etc., without limitation. Optionally, functional module W includes light emitting unit, loudspeaker, temperature regulator, vibration motor and driving motor, etc., corresponding to realize image display function, sound function, temperature regulation function, vibration function and rotation translation function, etc., without limitation.

[0031] The utility model provides electronic equipment, by using functional module W and the touch control device in the utility model embodiment, functional module W is electrically connected with controller MCU, and controller MCU is used to input control signal to functional module W, realize the specific function of electronic equipment by touch control, reduce the risk of false touch caused by non-human operation simultaneously.

[0032] Please refer to Figure 1 The utility model also provides a kind of touch control device, including the touch control circuit 100 in the utility model embodiment. Optionally, the touch control device can be touch screen and touch key, etc., without limitation. Optionally, touch control device also includes screen (not shown), and the touch electrode TP and pressure sensor P of the touch control circuit 100 in the utility model embodiment are all arranged on screen.

[0033] The utility model provides touch control device, by using the touch control circuit 100 in the utility model embodiment, realize the specific function of electronic equipment by touch control, reduce the risk of false touch caused by non-human operation simultaneously.

[0034] Please refer to Figure 1 And Figure 2 The utility model also provides a kind of touch control circuit 100, including controller MCU, touch detection module 10 and pressure detection module 20, touch detection module 10 is electrically connected with controller MCU, and touch detection module 10 is used to input at least one touch signal to controller MCU, pressure detection module 20 is electrically connected with controller MCU, and pressure detection module 20 is used to input pressure signal to controller MCU, wherein, controller MCU is used to output control signal according to touch signal and pressure signal.

[0035] Optionally, please refer to Figure 1The touch detection module 10 includes one or more touch electrodes TP, and a user can touch a touch electrode TP to make the touch detection module 10 input a touch signal to the controller MCU, or the user can touch multiple touch electrodes TP to make the touch detection module 10 input multiple touch signals to the controller MCU.

[0036] Please refer to Figure 1 For example, the touch electrodes TP are numbered in sequence as touch electrode TP1, touch electrode TP2, …, and touch electrode TPn. n Wherein, n represents the number of touch electrodes TP, and n is any positive integer greater than or equal to 2.

[0037] Please refer to Figure 2 After the electronic device starts to work, the touch circuit 100 performs program initialization, the controller MCU starts to detect the input signal and enters a state of waiting for detecting the signal, the touch detection module 10 inputs one or more touch signals to the controller MCU after receiving a single-point touch or a multi-point touch, and the pressure detection module 20 inputs a pressure signal to the controller MCU after receiving a press.

[0038] Specifically, the controller MCU first determines whether a touch signal is detected. If the controller MCU does not detect a touch signal, the controller MCU continues to wait for signal detection. When the controller MCU detects a touch signal, it also determines whether a pressure signal is detected. If the controller MCU detects a touch signal but no pressure signal, it returns to the state of waiting for signal detection. If the controller MCU detects a touch signal and also detects a pressure signal, it outputs a control signal. That is, the controller MCU outputs a control signal only when both a touch signal and a pressure signal are detected, otherwise it returns to the state of waiting for signal detection.

[0039] Alternatively, the controller MCU can first determine whether a pressure signal is detected and then determine whether a touch signal is detected. The controller MCU can also determine whether a touch signal and a pressure signal are detected at the same time, without limitation. That is, as long as the controller MCU detects the existence of both signals, it outputs a control signal.

[0040] By setting the controller MCU, the touch detection module 10, and the pressure detection module 20, the touch detection module 10 and the pressure detection module 20 are electrically connected to the controller MCU, and the controller MCU is used to output a control signal according to at least one touch signal output by the touch detection module 10 and a pressure signal of the pressure detection module 20, so that the touch circuit 100 outputs a control signal only when a person touches and applies pressure to the pressure detection module 20, and the touch circuit 100 does not output a control signal when it contacts with liquid, dust, a ring, a key, or other foreign matter or light touch of the skin, thereby reducing the risk of false touch caused by non-human operation.

[0041] Please refer to Figure 1 The touch detection module 10 comprises a touch chip IC and a plurality of touch electrodes TP, the plurality of touch electrodes TP are electrically connected with the touch chip IC, and the touch chip IC is electrically connected with the controller MCU.

[0042] For example, the touch electrode TP is a capacitive touch electrode TP. Optionally, the touch electrode TP comprises a touch panel (not shown) and an electrode sheet (not shown), the touch panel and the electrode sheet form a capacitor, the touch panel is arranged on the screen, and the electrode sheet is electrically connected with the touch chip IC. When the touch panel is touched and pressed, because the human body has conductivity, a capacitor between the human body and the electrode sheet is formed, and the size of the capacitor is changed, so that the electrode sheet inputs current to the touch chip IC. Optionally, the touch panels of the plurality of touch electrodes TP are uniformly distributed on the screen. Optionally, the touch panel can be made of glass, plastic and other materials as dielectric, and the electrode sheet can be made of indium tin oxide, silver, aluminum and carbon fiber as conductive medium, without limitation.

[0043] By arranging that the touch detection module 10 comprises a touch chip IC and a plurality of touch electrodes TP, the plurality of touch electrodes TP are electrically connected with the touch chip IC, and the touch chip IC is electrically connected with the controller MCU, so that the touch detection module 10 can input one or more touch signals to the controller MCU, single-touch or multi-touch of the touch control circuit 100 is realized, and the sensitivity and practicability of the touch control circuit 100 are improved.

[0044] Please refer to Figure 1 The touch chip IC comprises a plurality of first input terminals IN1 and a plurality of first output terminals OUT1, the controller MCU comprises a plurality of second input terminals IN2, the plurality of first input terminals IN1 and the plurality of first output terminals OUT1 correspond one by one, the plurality of first input terminals IN1 are electrically connected with the plurality of touch electrodes TP one by one, and the plurality of first output terminals OUT1 are electrically connected with the plurality of second input terminals IN2 one by one.

[0045] Optionally, the controller MCU further comprises a third input terminal IN3 and a second output terminal OUT2, the third input terminal IN3 is electrically connected with the pressure detection module 20, and the second output terminal OUT2 is electrically connected with the aforementioned functional module W. Optionally, the second input terminal IN2, the third input terminal IN3 and the second output terminal OUT2 can also be output ports.

[0046] The controller MCU includes a plurality of second input terminals IN2, the plurality of first input terminals IN1 correspond to the plurality of first output terminals OUT1 one by one, the plurality of first input terminals IN1 are electrically connected to the plurality of touch electrodes TP one by one, and the plurality of first output terminals OUT1 are electrically connected to the plurality of second input terminals IN2 one by one, so that the plurality of capacitive signals input by the plurality of touch electrodes TP to the touch chip IC do not interfere with each other, and the touch chip IC can input a corresponding number of touch signals to the controller MCU when the plurality of touch electrodes TP are touched.

[0047] Please refer to Figure 1 The touch circuit 100 further includes a first power supply V1 and a first capacitor C1, one end of the first capacitor C1 is electrically connected to the first power supply V1 and also electrically connected to the touch chip IC, and the other end of the first capacitor C1 is electrically connected to the power ground.

[0048] The power ground refers to the negative electrode of the first power supply V1. Optionally, the touch chip IC further includes a first power supply positive electrode interface VDD1 and a first power supply negative electrode interface VSS, the first power supply positive electrode interface VDD1 is electrically connected to the first power supply V1, and the first power supply negative electrode interface VSS is connected to the power ground. Optionally, the first power supply V1 can input a positive voltage of 1.8V (volts) or 2.5V or 3.3V or 5V to the touch chip IC, without limitation.

[0049] Optionally, the first capacitor C1 is used to reduce voltage fluctuations and noise, so that the first power supply V1 provides stable operating voltage to the touch chip IC.

[0050] The touch circuit 100 further includes a first power supply V1 and a first capacitor C1, one end of the first capacitor C1 is electrically connected to the first power supply V1 and also electrically connected to the touch chip IC, and the other end of the first capacitor C1 is electrically connected to the power ground, so that the touch chip IC can work under the stable output voltage provided by the first power supply V1 to input touch signals to the controller MCU.

[0051] Please refer to Figure 1 The touch circuit 100 further includes a second power supply V2, which is electrically connected to the controller MCU and the pressure detection module 20.

[0052] Optionally, the controller MCU further includes a second power supply positive electrode interface VDD2 and a second power supply negative electrode interface GND, the second power supply positive electrode interface VDD2 is connected to the second power supply V2, and the second power supply negative electrode interface GND is connected to the power ground, wherein the power ground refers to the negative electrode of the second power supply V2. Optionally, the second power supply V2 is similar to the first power supply V1, and reference can be made accordingly, and will not be described again. Optionally, the first power supply V1 and the second power supply V2 can also be connected together and share the same power supply, to simplify the circuit design.

[0053] The touch control circuit 100 further comprises a second power supply V2, which is electrically connected with the controller MCU and the pressure detection module 20, so that the pressure detection module 20 and the controller MCU share one working power supply, and the structure of the touch control circuit 100 is simplified.

[0054] Please refer to Figure 1 The pressure detection module 20 comprises a pressure sensor P and an inductor L, the pressure sensor P is electrically connected with the second power supply V2, and the inductor L is connected with the pressure sensor P and the controller MCU.

[0055] Optionally, the inductor L is connected with the pressure sensor P and the third input end IN3. Optionally, the pressure sensor P can be a piezoresistive pressure sensor, a capacitive pressure sensor, a piezoelectric pressure sensor, an electromagnetic pressure sensor, etc., without limitation. When the pressure sensor P is subjected to pressure, the sensitive unit (not shown) inside the pressure sensor P changes in physical state under the action of the pressure and outputs a voltage change. Since the pressure of the human body pressing the pressure sensor P is not a constant value, the voltage output by the pressure sensor P has fluctuations, and the inductor L is used to filter out fluctuations in the current to input a stable pressure signal to the controller MCU.

[0056] By setting the pressure detection module 20 to comprise the pressure sensor P and the inductor L, the pressure sensor P is electrically connected with the second power supply V2, and the inductor L is connected with the pressure sensor P and the controller MCU, so that when the pressure sensor P is subjected to pressure, it can input a stable pressure signal to the controller MCU through the filtering action of the inductor L.

[0057] Please refer to Figure 1 The pressure detection module 20 further comprises a first resistor R1, which is connected with the pressure sensor P and the inductor L.

[0058] Since the voltage signal output by the pressure sensor P can be very small and is easily affected by external interference such as line noise and electromagnetic waves, resulting in unstable signals, by setting the pressure detection module 20 to further comprise the first resistor R1, which is connected with the pressure sensor P and the inductor L, the pressure detection module 20 can amplify the signal or adjust the output range of the signal by adjusting the resistance value of the first resistor R1, so that the signal is more stable and easier to process.

[0059] Please refer to Figure 1 The pressure detection module 20 further comprises a second resistor R2 and a second capacitor C2, the second resistor R2 is connected in parallel with the second capacitor C2, and the second resistor R2 is electrically connected between the first resistor R1 and the inductor L.

[0060] By setting the pressure detection module 20 further comprises a second resistance R2 and a second capacitor C2, the second resistance R2 is connected with the second capacitor C2 in parallel, the second resistance R2 is electrically connected between the first resistance R1 and the inductor L, so that the voltage output by the pressure sensor P can be divided by the first resistance R1 and the second resistance R2, the voltage within the MCU port acquisition range is obtained, and the pressure signal is more stable after being further filtered by the second capacitor C2 and the inductor L.

[0061] In the description of the embodiments of the present application, it should be explained that the orientation or position relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship described based on the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0062] The above disclosed is only a preferred embodiment of the present application, of course, cannot limit the scope of the present application, and those skilled in the art can understand that all or part of the above-mentioned processes can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A touch circuit, comprising: The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit.

2. The touch circuit of claim 1, wherein, The application relates to a touch control circuit.

3. The touch circuit of claim 2, wherein, The application relates to a touch control circuit.

4. The touch circuit of claim 2, wherein, The application relates to a touch control circuit.

5. A touch device, comprising: The application relates to a touch control circuit.

6. An electronic device, comprising: The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. The application relates to a touch control circuit. 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