Ruibo mobile phone expertiseWhat is a capacitive screen and a resistive screen

First of all, the resistive screen:

The screen part of the resistive touch screen is a multi-layer composite film, which is composed of a layer of glass or plexiglass as the base layer, and the surface is coated with a transparent conductive layer (ITO film), and then covered with a layer of smooth and scratch-resistant plastic layer with hardened outer surface. Its inner surface is also coated with an ITO layer, separated by a number of tiny (less than thousandths of an inch) transparent separation point between the two conductive layers. When the finger touches the screen, the two layers of ITO are in contact, the resistance changes, the controller calculates the coordinates of the contact point according to the detected resistance change, and then operates accordingly according to this coordinate, so this technology must apply force to the screen in order to obtain the touch effect.

According to the number of lead-out wires, resistive screens are divided into four-wire, five-wire and other types. The outer surface of the five-wire resistive touch screen is conductive glass instead of a conductive coating, which has a longer life and higher light transmittance.

If the ITO coating of resistive touch screen is too thin, it is easy to brittle, and if the coating is too thick, it will reduce light transmission and internal reflection and reduce clarity. Due to being often touched, small cracks and even deformation will appear after a certain period of use, so its life span is not long.

Resistive touch screens** are cheap and easy to produce. The advent of four-wire, five-wire, seven-wire, and eight-line touch screens makes them more reliable, while also improving their optical properties.

Let's talk about capacitive screens:

The capacitive touch screen uses the current sensing of the human body to work, and its touch screen consists of a four-layer composite glass screen. When a finger touches a touchscreen, the finger draws a small amount of current from the point of contact due to a coupling capacitance formed by the electric field of the human body, the user, and the surface of the touchscreen, which is a direct conductor for high-frequency currents. 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 from the finger to the four corners, and the controller obtains the position information of the touch point through the accurate calculation of the proportion of these four currents.

Capacitive touch screens have the advantages of high sensitivity and easy implementation of multi-touch technology. However, the shortcomings of the capacitive screen are also obvious, the reflection of the capacitive screen is serious, and the transmittance of the four-layer composite touch screen of the capacitive technology to each wavelength of light is uneven, and there is a problem of color distortion, due to the reflection of light between the layers, it also causes the blurring of image characters. And for mobile phone users, its technical characteristics determine that it can only be operated with fingers (now this disadvantage is actually regarded as an advantage...).

The biggest disadvantage of capacitive screen is "drift". Since the capacitance changes with the different temperature, humidity or grounding conditions, when the ambient temperature, humidity and ambient electric field change, it will cause the drift of the capacitive screen, resulting in inaccurate positioning.

The capacitive screen is a bit like clicking on the calm water surface with your hand to produce ripples, it is spread on the mobile phone screen with a special conductive material, only a person can make the screen produce a subtle vibration frequency to drive the mobile phone with a light touch with a finger; The platinum rui I use is a capacitive screen, which feels good to the touch and is also very handy. And the resistive screen is like clicking on a puddle of flour with your hand, and you have to use pressure to deform it. The resistive screen can only be clicked with a finger, and the resistive screen can be clicked with a fingernail or pen, which is of course convenient and accurate to operate!

To put it simply, the resistive screen is used to press, and the capacitive screen is used to touch.

Good capacitance, high clarity and long life.

Capacitive screen, the resistance is just a single touch, and the capacitive screen supports multi-touch.

I have experience with this. Capacitive screen is good.

The resistive screen must be used with a pen when it is used, if you do not use the pen, you have to press very hard with your fingers to react, and sometimes you have to press until your hand hurts to react. And now the large-screen mobile phone with a pen is too outdated.

As for the capacitive screen, as long as you touch it with your fingers, you can do it. But there's a small drawback.,When you hit **, your face sometimes hits the screen and sometimes hits the place where you hang up = =.,But that's a small drawback.。 In addition, the capacitive screen can be multi-touch, and now most mobile phone software supports this, and even must have this function to run.

I've used both, and the capacitive screen really wins across the board.

The capacitive screen is good, and the picture expression is more vivid than the resistance.

One can multi-touch and one can't.

The "screen" of resistive and capacitive screens refers to the transparent touchpad on the outer layer of the screen. The display effect in the sunlight depends on the screen material, and most of the touch screen machines are resistive screens, have anyone complained about the poor display effect in the sun?

The resistive screen is triggered by pressing, and all operations need to apply pressure to the screen, because the general resistive screen is composed of multiple layers of film, and the screen will stay when pressed, so it is also called a soft screen.

The capacitive screen is triggered by the coupling of the equivalent capacitance of the human body and the screen, which is a real touch "touch" screen, and all operations must be in contact with the human body (it is really choking in winter). Capacitive screens are all hard screens, and it is currently more popular to use tempered glass to make capacitive screens.

At present, the capacitive screen can already achieve 10-point touch, while the resistive screen is limited by its own structure and can only achieve 2-point touch at most.

The resistive screen is referred to as the soft screen, which can be clicked by the stylus or finger, and can achieve precise positioning and clicking; The disadvantage is that the positioning is not accurate, and the position must be re-positioned;

The capacitive screen is referred to as a hard screen, which can only be operated through the skin of the fingers; The disadvantages are the inability to make precise positioning clicks and the inability to operate with a stylus;

In terms of ease of use, it is recommended to use a resistive screen;

However, some mobile phone system software is done well, and the capacitive screen can achieve multi-touch operation, while the resistive screen cannot be realized! (By the way: multi-touch means that 2 fingers can operate on the touchscreen at the same time without affecting each other.) )

The principle of the resistive screen is that there is a layer of film on the screen, there is a gap between the screen and the film, when the screen is touched, the conductor between the two layers of film is turned on, the resistance between the corresponding electrodes is reduced, the conduction is triggered, and the mobile phone screen is controlled; The principle of the capacitive screen is that there is a charge induction between the conductive lattice and the fingers, just like when we touch the antenna with our hands when we listen to the radio, we can sense the signal, and the corresponding electrodes are turned on when the mobile phone screen senses the charge, so that the mobile phone is controlled. The resistive screen will be scratched after a long time, and the capacitive screen is not easy to scratch when the fingers are in contact.

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.

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.

To put it simply, the capacitive screen can be controlled at multiple points (some mobile phones are not available), the capacitive screen is a touch screen that can be touched with fingers, and touches such as nails are not reflected. And the resistor is what touch can be, but I think the capacitance is better than the resistor, anyway, each has its own a little bit and its own shortcomings, see what you like! Many of today's mobile phones are capacitive touch screens.

Resistive screens. Soft, to press hard, does not support multi-point, plastic screen.

Capacitive screen. Hard, glassy, finger touch can be fine, but not as accurate as the resistive screen, support multi-point.

The resistive screen is more sensitive, small places can also be clicked, as long as the pressure can be sensitized, it can be operated with nails and fingers, it does not support multi-touch, and the cost is low. The capacitive screen supports multi-touch, which has a better experience, and can only be effective by touching it with a finger, which is more expensive.

One temperature sensing, one pressure sensing.

The capacitive screen is better, and at the same time, it will be more expensive.

The resistive screen is commonly known as the soft screen, which needs to be pressed hard, with an accuracy of a single pixel, the cost is very low, and the screen is easy to scratch if it cannot be touched at multiple points.

Capacitive screen, commonly known as hard screen, can be touched lightly by fingers, the accuracy can reach several pixels, the cost is 10% to 50% more expensive than the resistive screen, multi-touch can be realized, and the damage resistance is strong.