How touch screens work includes resistive and capacitive screens!

The resistor works by being guided by a hard object, such as a fingernail or stylus. The capacitive screen works by the friction between the fingers (flesh, not the nails) and ......the screen to generate static electricitySatisfied.

Dear, hello, I am happy to answer your questions, the working principle of the resistive touch screen is mainly through the principle of pressure sensing to achieve the operation and control of the screen content, this touch screen body part is a multi-layer composite film that is very compatible with the surface of the display, of which the first layer is the bottom layer of glass or plexiglass, the second layer is the partition layer, the third layer is the surface layer of multiple resins, and the surface is also coated with a transparent conductive layer, and then covered with a layer of hardened outer surface, smooth and scratch-resistant plastic layer. The conductive layer and glass layer sensors on the surface of the polylipid layer are separated by a number of tiny compartments where the current passes through the surface layer, and when the surface layer is pressed down, it touches the bottom layer, and the controller simultaneously reads the proportional current from the four corners and calculates the distance of the finger position. This type of touch screen uses two highly transparent conductive layers to form a touch screen, with the distance between the two layers being only microns.

When the finger touches the screen, the two layers of conductive layers that are usually insulated from each other have a contact at the touch point, because one of the conductive layers is connected to the 5V uniform voltage field in the direction of the y-axis, so that the voltage of the detection layer changes from zero to non-zero, and the controller detects this connection, carries out a D conversion, and compares the obtained voltage value with 5V, you can get the Y-axis coordinates of the touch point, and the X-axis coordinates are obtained in the same way, which is the most basic principle common to all resistive technology touch screens. I hope my answers help you and I wish you a happy life.

Resistive screens can be touched with any hard object, while capacitive screens can only be touched by fingers (by static electricity) (of course, you can also use your feet). The stronger the static electricity of the hand, the higher the sensitivity, understand?

Capacitive screen: high cost, support multi-touch, that is, you can use your finger directly.

Resistive screen: The cost is slightly lower, and only supports a single touch, with a fingernail, or a stylus.

Capacitive touch screen features, structure G+G structure multi-touch projection capacitive screen, fashionable and beautiful, fast response. Hard screen scratch resistant.

Capacitive touch screens only need to be touched, and no pressure is required to generate a signal.

Capacitive touch screens require only one or no correction after production, while resistive technology requires conventional correction.

Customized resistive screen, capacitive screen, looking for full touch Lu Shuyun, she is the number of 183, the middle is 2005, the back four digits are 9375, the life of the capacitive scheme will be longer, because the parts in the capacitive touch screen do not need to move. In a resistive touch screen, the upper ITO film needs to be thin enough to be elastic so that it bends downward to contact the ITO film underneath.

Capacitive technology is superior to resistive technology in terms of light loss and system power consumption.

The choice between capacitive and resistive technology depends mainly on the object touching the screen. If it is a finger touch, a capacitive touch screen is a better choice. If a stylus is required, whether plastic or metal, a resistive touch screen will do the trick.

A capacitive touch screen can also use a stylus, but a special stylus is required to match.

Surface capacitive can be used for large touch screens, and the combination is also low, but it cannot support gesture recognition nowadays: inductive capacitive is mainly used for small and medium-sized touch screens, and can support gesture recognition.

Capacitive technology is wear-resistant, has a long service life, and has low maintenance costs for the user, so the overall operating expenses of the manufacturer can be further reduced.

Capacitive touch screens can support multi-touch technology, and unlike resistive touch screens, they are unresponsive and less prone to wear and tear.

Resistive touch screen features:

The advantage of resistive touch screen is that its screen and control system are relatively cheap, and the response sensitivity is very good, and whether it is a four-wire resistance touch screen or a five-wire resistance touch screen, they are a kind of working environment that is completely isolated from the outside world, not afraid of dust and water vapor, and can adapt to various harsh environments. It can be touched with any object and has good stability. [12]

The advantages of resistive touch screens can be categorized as:

1.The resistive touch screen is highly accurate down to the pixel level and can be used with a maximum resolution of 4096x4096.

2.The screen is not affected by dust, moisture and oil and can be used in lower or higher temperature environments.

3.The resistive touchscreen is pressure-sensitive, can be touched with any object, even with gloves, and can be used for handwriting recognition.

4.Resistive touch screens are relatively inexpensive due to their mature technology and low threshold.

Resistance screen life: Four-wire resistive screen is lower than five-wire resistive screen. The life of a four-wire resistive screen is lower than that of an eight-wire resistive screen.

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, and the laminated ITO coating is used as the working surface ,..Capacitive screen manufacturers are fully touched:

The number of 183, the middle four digits of 2005, followed by 9375... Four electrodes are drawn from the four corners, and the inner ITO is a 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.

A resistive touch screen is a sensor that converts the physical position of a touch point (x,y) in a rectangular area into a voltage that represents the x and y coordinates. Many LCD modules use resistive touch screens that can be used with four, five, seven, or eight wires to generate the screen bias voltage and read back the voltage of the touch point.

There are many differences, the resistive screen is a soft screen, the resistive screen ** discount, and the resistive screen is a single touch. Capacitive screen hard screen, relatively expensive, ten-point touch.

Capacitance. You only use your fingers to the belly. As long as it is meat, you can touch it lightly, so that you don't need to use force.

Resistance. Anything is good to use on the screen. Sometimes the sea point is not accurate. There are many places to dot and the screen is spent.

The structure and working principle of the resistive screen.

First of all, resistive screens are divided into several categories, such as four-wire and five-wire, but what we often see is four-wire and five-wire, and the working principle is almost the same. The biggest difference is that the accuracy will vary when it is affected by external forces.

In fact, to put it simply, the resistive screen is divided into two layers, and the middle is separated by an isolator. When two layers collide with each other, the current will have an effect, and the chip will react by calculating the data between the force and the current, assessing which position of the screen is under pressure. Because resistive screens need the upper and lower layers to collide before they can react.

Therefore, when two points are pressed at the same time, the pressure on the screen becomes unbalanced, resulting in touch errors. Therefore, this principle makes it difficult to realize multi-touch on the resistive screen, and it is not easy to adjust the sensitivity of multi-touch even if it is realized through technical means.

In addition, because the resistive touch screen requires a certain amount of pressure, it is easy to cause the wear of the surface material for a long time, or the upper and lower layers lose their elasticity and cause poor contact, which will affect the normal service life of the product.

The structure and working principle of the capacitive screen.

After understanding the working principle of the resistive screen, let's take a look at the structure and working principle of the capacitive screen. In fact, the capacitive screen and the resistive screen also have two layers, but the difference is that the capacitive screen does not react through the collision between the two layers. Basically, the capacitive screen uses the lower layer to transmit signals to the upper layer, and when the upper layer is contacted by the conductor, the lower layer can receive the information and make calculations.

Therefore, the two layers of screens do not have to be in direct contact, only through the information received by the lower layers and calculations are made to determine where the fingers touch. It is precisely because of this that the capacitive screen can not only support multiple points at the same time, but also greatly improve the sensitivity of touch. And because the human body itself is a conductor, the capacitive screen can react when the finger touches the screen.

The advantage of capacitive screen over resistive screen is that capacitive screen is the principle of electrostatic drive of the human body, resistance screen is the principle of force drive, and capacitive screen can be used under harsh conditions (high temperature, high humidity, low temperature), but the use of resistive screen will be affected.

What is the difference between resistive touch screen and capacitive touch screen?

To put it simply, the former can't support multi-touch, and the latter does!

The approximate principle of capacitive screen is that finger contact with the screen forms a capacitance, and the capacitance between the finger and the screen changes to obtain touch information.

The feature is that the screen is a hard screen, sensitive to touch, no need to press the screen hard, supports multi-touch, but can only be touched with fingers.

The general principle of the resistive screen is that the finger presses the screen, and the distance between the double-layer screens changes, resulting in the change of the screen resistance value and obtaining touch information.

The feature is that the screen is a soft screen, there is a slight depression when pressed, you need to touch it a little harder, you can use any stylus, but it does not support multi-touch.