Resistance screen and capacitive screen which is good

Working principle

Resistance touch screen: composed of multilayer transparent conductive plate, two layers of transparent metal conductive layer used to identify the touch signal can identify the pressure signals from the stylus, nails, and any hard objects, and normally the two layers of transparent metal conductive layer are in mutual insulation state, when the stylus and other hard objects touch the surface of the screen, The first layer of metal conductive layer has deformation, contact with the second layer of metal conductive layer, at this time between the two layers of metal conductive layer to form a pathway, and because the two layers of metal conductive layer between the resistance, constant voltage (5V) from the two layers of metal between the conductive layer will be buck, according to this characteristic, The touch-screen circuit can achieve the position of the touch-screen by using the voltage value to calculate the coordinates from which the pressure comes from.

Capacitive touch screen: The human body, touch the top of the screen and the surface of the screen will naturally form a coupling capacitor, coupled capacitance can effectively communicate from the body of high-frequency current signals, using the characteristics of biological currents, distributed in the four corners of the screen electrodes can receive from the finger through the fingers of the human body high-frequency current signal transmission, Because of the difference of contact position, the current intensity of the electrodes on the four angles is different, and the coordinates of the contact points can be obtained by the comparison operation, so that the screen positioning is realized.

　　Precision and sensitivity

Resistance screen: Compared to the capacitive screen, resistance screen precision is much higher, the two layers of transparent metal conductive layer to form a path to generate current, just need to come from a very small pixel point of pressure, so the screen positioning of resistance screen is very accurate, even can be accurate to the screen of one pixel point; But the resistance screen positioning needs enough pressure to achieve, so uneven touch screen may lead to the identification of interrupts, compared to the capacitive screen sensitivity is much worse;

Capacitive screen: Because the biological current is distributed on the top of the finger surface, so the input current is not fixed to a point, but in a plane, resulting in the capacitance screen in the input must occupy several pixel points, while the finger and screen does not need to fully contact to form a current path, so it is easy to screen positioning occurs In the accuracy of the capacitive screen does not occupy the advantage, but because of the use of human biological current induction principle, so we need to touch the top of the finger with the screen, do not need to create pressure on the screen to achieve the transmission of the signal, so the sensitivity is higher than the resistance screen;

　　User Experience

Resistance screen: Resistance screen because the voltage pressure drop to calculate the screen coordinates, this feature determines that it can not be calculated at the same time different pressure points of the coordinates, resulting in the resistance screen can not support more than touch;

Capacitive screen: Its current distributed input characteristics can be perfect to receive signals from different screen coordinates point, you can say that more than a touch is a big highlight of the capacitive screen, now, more and more software programs to develop a multi-touch new features, For the user experience, capacitive screen multi-touch technology does improve the user experience to a new level;

　　Cost and Maintenance

Resistance screen: The Resistance screen has developed to today because of its mature technology, equipment and easy access to the raw materials, so that the resistance screen in the cost is very low; since the early mobile phone screen and notebook screen are used as input carrier, the market share is very large, so it is easy to find relevant repair parts in the market, So the resistance screen in the maintenance aspect appears to have the superiority;

Capacitance screen: Capacitance screen production cost is generally more than the resistance screen 10% to 50%, the early capacitor screen mainly in Apple, Google's high-end products used, these products are typical flagship products, consumers are also easy to accept, but in the low-end product market, Capacitive screen often because of its high cost to many consumers deterred;