Why resistive screens can t support multi touch, while capacitive screens can

The principle of resistive screen is different from that of capacitive screen, the resistive screen is pressed to produce touch, if you press more points, it is unbalanced, you want to press it here, press it there, can it be balanced, so this multi-point can be realized, but it is not as good as the capacitive screen multi-touch screen.

Industrial capacitive screen expert, the number of 183, the middle four digits are 2005, and the last four digits are 9375. All touch.

Capacitive screen: It is a finger touching the touch screen to produce a coupling capacitance to form a touch screen. , so that all ten points can produce an accurate touch at the same time

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. 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.

The resistive screen is induced by pressing with a hard object.

Capacitive screens are temperature-sensing.

Multi-touch means that it can support multi-point input at the same time.

There are many technologies that can achieve multi-touch, not only capacitive screens. Resistance screens can also be used, infrared screens, and ultrasonic screens can also be used.

Capacitive screens are divided into self-containment and mutual tolerance, the commonly used is mutual tolerance, which can achieve multi-touch, and self-compliance generally realizes single point or local two points.

The number of multi-touches is generally nominal 3 points. 5 points. 10 o'clock.

It's mainly about the size of the touchscreen, after all, no one wants to put ten fingers on a 4-inch screen. The second is related to the processing chip of the touch, the more touch points, the more complex the data processing, but the current touch chip technology is very good, and the number of touch points will be limited in the algorithm program (some can be opened to the user).

Hope the above is helpful to you.

To put it simply, the resistive screen uses pressure, you can use anything, you can use your fingers and stylus, and you can use other things. The capacitive screen should rely on the temperature of the fingers, it is useless to use other things, the capacitive screen is a multi-touch touch, and the recognition is relatively high, unlike some resistive screens, it does not respond for half a day, and it has to be very hard. Capacitive screens are recommended.

The capacitive screen is a kind of touch screen, which can be understood as a combination of many transparent small capacitors, the position of each capacitor can be identified in the system, when working, each capacitor of the capacitive screen has a little charge, when we touch the capacitive screen with our fingers, the charge of the position touched by the fingers will be led away (the human body is also conductive), the system can calculate which position of the charge of the small capacitor is led away, so that we can know the occurrence of the touch action and carry out the corresponding function.

That's why, in winter, wearing ordinary gloves, you can't use capacitive screens, because ordinary gloves don't conduct electricity.

Multi-touch is a touch action that the system can recognize multiple locations at the same time.

This is mainly compared with the resistive touch screen, because of the different working principles, the ordinary resistive screen can only recognize the touch action of one point at a time.

A simple explanation is that when playing a game, there are two virtual buttons on the screen, and a mobile phone that supports multi-touch will respond when pressed together. And the resistive screen does not support multi-point mobile phones, only the first button pressed down has a response, the second one has no response, and it cannot respond when pressed together.

This means that you can use multiple points on the touchscreen to manipulate it at the same time, just like the touch version on some laptops.

There can be multiple touchpoints on the screen to operate.

1. Multi-touch is a multi-point or multi-user interactive operation mode on the same display interface, abandoning the single-point operation mode of keyboard and mouse.

2. Users can touch the screen with a single touch with both hands, or touch the screen with different gestures such as clicking, double-tapping, panning, pressing, scrolling and rotating, so as to achieve free control, so as to better and more comprehensively understand the relevant characteristics of the object (text, video, **, health film, three-dimensional simulation and other information). 3. According to customer needs, the corresponding touchpad, touch software and multi-system can be customized; Can be used with professional graphics software.

What do you mean by virtual keyboard?

It can be operated with several fingers.

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?

The capacitive screen can be multi-touch, and the capacitive screen is the basis for multi-touch.