Control method based on capacitive touch technology

Abstract

The invention relates to the technical field of capacitive touch, and discloses a control method based on a capacitive touch technology, which comprises the following steps that: when a capacitive screen is touched, a coupling capacitor is formed among a human body electric field, a finger and a conductor layer, current emitted by electrodes on four sides flows to a contact, and the strength of the current is in direct proportion to the distance between the finger and the electrodes; and the controller positioned behind the touch screen can calculate the proportion and intensity of the current and accurately calculate the position of the touch point. According to the control method based on the capacitive touch technology, through interaction of the capacitive touch IC, the main control IC, the touch algorithm and the recognition algorithm, a mobile phone can be unlocked by touching any position of a screen with a finger, and in addition, the touch sensitivity can be adjusted at any time according to the surface condition of the screen; therefore, the touch technology has a certain anti-interference effect, meanwhile, the touch accuracy is improved, and the problems that an existing capacitive touch control system is single in function and insufficient in anti-interference capacity, and the accuracy needs to be improved are solved.

Description

Technical Field

[0001] The present invention relates to the field of capacitive touch technology, and in particular to a control method based on the capacitive touch technology. Background Art

[0002] With the development of science and technology, capacitive touch technology is widely used in various electronic products due to its advantages such as sensitive response, convenient operation and high durability. Capacitive touch screen technology works by using the current induction of the human body. The capacitive touch screen is a four-layer composite glass screen. The inner surface and interlayer of the glass screen are coated with a layer of ITO. The outermost layer is a thin layer of silica glass protective layer. The interlayer ITO coating is used as the working surface. Four electrodes are led out at the four corners. The inner layer ITO is a shielding layer to ensure a good working environment. However, the existing capacitive touch control system has problems such as single function, insufficient anti-interference ability, and accuracy needs to be improved. For this reason, we propose an improved capacitive touch control method and device. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a control method based on capacitive touch technology, which solves the problems of the existing capacitive touch control system, such as single function, insufficient anti-interference ability, and need to improve accuracy.

[0004] The present invention provides the following technical solutions: a control method based on capacitive touch technology, including: when touching the capacitive screen, a coupling capacitor is formed between the human body electric field, the finger and the conductor layer, the current emitted by the four-side electrodes will flow to the contact point, and its strength is proportional to the distance between the finger and the electrode, and the controller located behind the touch screen will calculate the proportion and strength of the current, accurately calculate the position of the touch point, and then execute the key command, in addition, the capacitive touch structure contains an insulating medium layer, a metal layer and a substrate layer, the substrate layer is provided with a capacitive touch IC and a main control IC, the metal layer is electrically connected to the capacitive touch IC, the capacitive touch IC is electrically connected to the main control IC and a power supply, the metal grid capacitive touch control densely distributes the silk threads of conductive metals such as copper and their oxides on the PET substrate conductive layer to form a conductive metal grid with a regular shape, and realizes the signal transmission function through inductive touch based on the bonded conductive film, and is equipped with a main control IC including a detection module and an identification module, and the identification module includes a fingerprint acquisition module, a feature extraction module and a matching module.

[0005] After S1 presses the capacitive screen with his finger, the finger changes the capacitance of the contact point, and the capacitive touch IC starts working immediately, feeding back the current electric shock information to the main control IC, which then performs user fingerprint recognition and matching to start the device;

[0006] When the S2 detection module detects water droplets on the screen, the detection module cooperates with the touch algorithm to send instructions to the capacitive touch IC. At this time, the capacitive touch IC will reduce the touch sensitivity of the screen;

[0007] The S3 inspection module, in conjunction with the recognition algorithm, can also adjust the fingerprint unlocking position in real time based on the finger pressure location.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] This control method based on capacitive touch technology, through the interaction between capacitive touch IC, main control IC, touch algorithm and recognition algorithm, can achieve the goal of unlocking the mobile phone by touching any position of the screen with a finger. In addition, the touch sensitivity can be adjusted at any time according to the surface conditions of the screen, so that the touch technology has a certain anti-interference effect, and at the same time, the touch accuracy is improved, solving the problems of existing capacitive touch control systems such as single function, insufficient anti-interference ability, and accuracy that needs to be improved. DETAILED DESCRIPTION

[0010] A control method based on capacitive touch technology, including: when touching the capacitive screen, a coupling capacitor will be formed between the human body electric field, the finger and the conductor layer, the current emitted by the four-sided electrodes will flow to the contact point, and its strength is proportional to the distance between the finger and the electrode, and the controller located behind the touch screen will calculate the proportion and strength of the current, accurately calculate the position of the touch point, and then execute the key command. In addition, the capacitive touch structure contains an insulating medium layer, a metal layer and a substrate layer, the substrate layer is provided with a capacitive touch IC and a main control IC, the metal layer is electrically connected to the capacitive touch IC, the capacitive touch IC is electrically connected to the main control IC and a power supply, and the metal grid capacitive touch densely distributes the silk threads of conductive metals such as copper and their oxides on the PET substrate conductive layer to form a conductive metal grid with a regular shape, and realizes the signal transmission function through inductive touch based on the bonded conductive film, and is equipped with a main control IC including a detection module and an identification module, and the identification module includes a fingerprint collection module, a feature extraction module and a matching module.

[0011] After S1 presses the capacitive screen with his finger, the finger changes the capacitance of the contact point, and the capacitive touch IC starts working immediately, feeding back the current electric shock information to the main control IC, which then performs user fingerprint recognition and matching to start the device;

[0012] When the S2 detection module detects water droplets on the screen, the detection module cooperates with the touch algorithm to send instructions to the capacitive touch IC. At this time, the capacitive touch IC will reduce the touch sensitivity of the screen;

[0013] The S3 inspection module, in conjunction with the recognition algorithm, can also adjust the fingerprint unlocking position in real time based on the finger pressure location.

[0014] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control method based on capacitive touch technology, characterized in that: When touching the capacitive screen, a coupling capacitor will be formed between the human body's electric field, fingers and conductor layer. The current emitted by the four-sided electrodes will flow to the contact point, and its strength is proportional to the distance between the finger and the electrode. The controller behind the touch screen will calculate the proportion and strength of the current, accurately calculate the position of the touch point, and then execute the key command. In addition, the capacitive touch structure contains an insulating dielectric layer, a metal layer and a substrate layer. The substrate layer is provided with a capacitive touch IC and a main control IC. The metal layer is electrically connected to the capacitive touch IC, and the capacitive touch IC is electrically connected to the main control IC and a power supply. The metal grid capacitive touch densely covers the threads of conductive metals such as copper and their oxides on the conductive layer of the PET substrate to form a conductive metal grid with a regular shape. The signal transmission function is realized by inductive touch based on the fitted conductive film. In addition, the main control IC is equipped with a detection module and an identification module. The identification module includes a fingerprint acquisition module, a feature extraction module and a matching module. After S1 presses the capacitive screen with his finger, the finger changes the capacitance of the contact point, and the capacitive touch IC starts working immediately, feeding back the current electric shock information to the main control IC, which then performs user fingerprint recognition and matching to start the device; When the S2 detection module detects water droplets on the screen, the detection module cooperates with the touch algorithm to send instructions to the capacitive touch IC. At this time, the capacitive touch IC will reduce the touch sensitivity of the screen; The S3 inspection module, in conjunction with the recognition algorithm, can also adjust the fingerprint unlocking position in real time based on the finger pressure location.