Why does the touch screen feel the human touch response?

The touch screen works according to the current, and there is a very critical structure inside the touch screen, which has two layers of conductive film, and between the two layers is not air, but there is an electric charge. There is a microcurrent in the human body, when the finger touches the screen, there will be a loss of charge, transferred to the human body, which can attract the electrons between the membranes, resulting in an electronic imbalance between the membranes, that is, when the hand touches the screen, the electrons of the screen will be unbalanced, and the position of your point will form a coordinate system, and the processing system will locate the position of the finger and carry out the desired operation.

Hello, the touch screen is another innovation in computer input technology, as long as you use your finger on it to complete the "information input" and "command", very convenient. The touch points on the touch screen correspond to a "function switch". When the finger touches this switching area, the corresponding "function program" immediately activates to execute a preset series of commands.

The key to the technology of the touch screen is to measure the exact position (i.e. coordinates) of the touch point, for example, the "surface acoustic wave touch screen" is equipped with horizontal and vertical ultrasonic transmitters in the upper left and lower right corners, and two corresponding ultrasonic receivers in the upper right corner. The ultrasonic emitter always emits ultrasonic waves while the touch screen is operating. When people touch the screen, their fingers block and absorb some of the ultrasound waves, causing their energy to be attenuated.

In this case, the ultrasonic receiver calculates the coordinates of the finger and thus obtains the exact position of the finger and reacts.

The touch screen is controlled using pressure sensitivity. The main part of the resistive touch screen is a resistive film screen that fits well with the surface of the display, which is a multi-layer composite film that uses a layer of glass or a hard plastic flat plate as the base layer.

The on-screen haptic feedback system can be programmed to drive various connectivity devices, which can be used to replace mechanical button panels and create vivid audio-visual effects through the LCD screen. As the latest computer input device, touch screen is currently the simplest, most convenient and natural way of human-computer interaction.

The touch screen can realize multi-touch, sensitive operation, and has the characteristics of not easy to be touched by mistake and high durability. The capacitive touch screen can sense the current of the human body to operate, avoid the touch of other items, and perform well in dustproof, waterproof, wear-resistant, etc., the capacitive touch screen has a long life and does not need pressure to generate signals, and can be achieved by direct touch. There will be some interference factors in the use of capacitive TP touch screen, electrostatic discharge, in a strong magnetic field, oil, sweat, water vapor and other conductive substances attached to the screen may permanently damage the capacitive screen.

When the ambient temperature and humidity do not meet the working environment, or the voltage is low and unstable, physical impact and vibration and other factors will cause damage to the capacitive touch screen, resulting in the scrapping of the capacitive screen. Therefore, capacitive TP touch screens need to be tested. The high-current shrapnel microneedle module plays a connecting role in the touch screen test, made of nickel alloy beryllium copper material, light and thin, tough, high service life, strong overcurrent capacity, its average service life can reach more than 20w times, and it can reach 50w times under good operation, environment and maintenance, and the yield rate of the female seat test is as high.

Touch screens are divided into capacitive and resistive

The principle of the capacitive screen is to use the human body as an electrode of a capacitor element, when there is a conductor close to the capacitance of a sufficient capacitance value coupled with the working surface of the sandwich ITO, (the capacitance between the finger contact and the screen is formed) the capacitance between the finger and the screen changes to obtain touch information.

Resistive touch screen is basically a thin film plus glass structure, when touched, the ITO of the lower layer of the film will contact the ITO of the upper layer of glass, fingers press the screen, the distance between the two screens changes, resulting in the change of screen resistance value, a message is sent out through the sensor, and then sent from the controller to the computer, through the driver to convert to the X and Y values on the screen, and complete the action of clicking, and present on the screen.

Earlier, people pressed a few keys through the keyboard, entered information to the computer, issued commands, after the birth of the mouse, people like to use the mouse to input, because it is very convenient to operate, the emergence of the touch screen is another innovation in microcomputer input technology, the input of information with the touch screen is simpler, more convenient, more natural, always use a finger on the top to lightly click, touch to complete the information input, to achieve the purpose of giving orders.

People who don't know anything about computers can operate it without special training. Because of this, touch screens have not only been widely used in industrial control, but also deeply rooted in people's daily life, and are favored.

The working principle of the touch screen is not complicated, each touch point on the screen corresponds to a function switch, when your finger touches the switch area, it is equivalent to turning on the switch, the relevant function program starts immediately, faithfully executes a series of commands after the pre-design, it is not difficult to see that the accurate position (that is, coordinates) of the touch point is the key to technology.

At present, the touch screen has obvious advantages in terms of beauty and practicality, simple operation, and the response speed can also meet the requirements, but the reliability is not ideal, and it needs to be further improved.

The touch screen is another innovation in computer input technology, which can be used to "enter information" and "give orders" with a single touch of your finger. The touch points on the touch screen correspond to a "function switch". When the finger touches this switching area, the corresponding "function program" immediately activates to execute a preset series of commands.

This surface acoustic wave is a mechanical wave that can propagate on the surface of a glass-like object, and the reflective strip can propagate this pulse signal to the surface of the cladding.

Because our hands are in contact with it that has a force on it, technology is still very powerful.

Because that switch can only be turned on by a human being.

When the finger touches this switching area, the corresponding "function program" immediately activates to execute a preset series of commands.

That's probably the power of technology.

Our human touch is like a keystroke.

Other gloves are also acceptable.

Nowadays, touch phones are divided into resistive and capacitive. And we generally use capacitive mobile phones, which are sensitive to the touch of our hands.

It has a lot to do with the special settings of the screen.,It's completely set to be more sensitive to people or can be recognized.,When people touch it, they will naturally react.。

When your finger comes into contact with a metal substance that conducts electricity in your phone, the capacitance of the screen changes. It also causes a change in the frequency of the oscillator connected to it. This creates the effect of a touch screen.

Most of the mobile phones we use now are capacitive touch screens, and capacitive touch screens have two layers of screens, which are divided into inner screens and outer screens, and the inner screen is the touch receiving screen.

The types of touch screens mainly include resistive technology touch screens, surface acoustic wave technology touch screens, capacitive technology touch screens, etc., and their principles are not the same.

Because there is a metal substance on the screen that can conduct electricity, when the finger touches it, the capacitance here changes, and the touch screen reaction is completed.

There is a sensor on the screen.

First of all, it should be noted that the vast majority of touch screens are capacitive screens now.

Capacitive touch screen technology works using the body's current sensing. The capacitive touch screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are each coated with a layer of ITO, the outermost layer is a thin layer of silicone glass protective layer, the laminated ITO coating is used as the working surface, four electrodes are drawn out at the four corners, and the inner layer ITO is the shielding layer to ensure a good working environment. When the finger touches the metal layer, due to the electric field of the human body, the user and the surface of the touch screen form a coupling capacitance, which is a direct conductor for high-frequency currents, so the finger draws a small current from the contact point.

This current flows out of the electrodes on the four corners of the touch screen, and the current flowing through these four electrodes is proportional to the distance of the finger to the four corners, and the controller derives the position of the touch point by accurately calculating the proportion of these four currents.